BAV Journal ISSN: 2366-6706 Finder Full-Text Search
Publisher: Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.V.
Munsterdamm 90 12169 Berlin, Germany
Editor: Lienhard Pagel
Co-Editor: Wolfgang Moschner
BAV Journal No. 097, November 2024
The elements of ASASSN-V J021226.31+472342.1 And
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: The variable Star ASASSN-V J021226.31+472342.1 And has been listed for some years in several databases with different periods
as an eclipsing binary of type EA. The authors present phased light curves from their own data, a list of primary and secondary minima,
O-C diagrams and an improved period solution of the star.
BAV Journal No. 096, October 2024
A LIST OF MINIMA AND MAXIMA TIMINGS BAVJ096_Data,txt
Author: Anton Paschke
Abstract: The list contains 485 timings of minina of eclipsing and maxima of pulsating stars.
It continues the list published in BAVJ 0079 (Paschke, 2023)
BAV Journal No. 095, September 2024
Light Curve Minima extracted from SuperWASP data for a Selection of Variable Stars BAVJ095_Data,txt
Authors: Analize Jooste, Derck P. Smits, Anton Paschke
Abstract: Smits & Skelton (2019) determined 1339 minima for the following 21 eclipsing binary stars: BS Hya, CD Hya, CH Hya, NSV5707, NSV5792,
NSV5872, NSV6007, NSV6009, V1053 Cen, V1054 Cen, V1121 Cen, V1133 Cen, V1139 Cen, V1140 Cen, V1144 Cen, V448 Cen, V454 Cen, V461 Hya,
V472 Cen, V600 Cen and V601 Cen. Analize Jooste determined 807 minima for the following four contact binary stars: BL Eri, V1112 Tau, V1119 Her and V1799 Ori.
BAV Journal No. 094, May 2024
A LIST OF TIMINGS Appendix: METHOD USED TO DETERMINE ECLIPSE MINIMA
Author: Analize Jooste, Anton Paschke
Abstract: Analize Jooste has determined 7173 minima timings for the following 35 stars covered in this issue of the journal:
EL Aqr, AH Aur, VW Boo, CK Boo, TW Cet, DY Cet, EE Cet, RW Com, CC Com, RW Dor, UX Eri, YY Eri, UZ Leo, XY Leo, XZ Leo, AM Leo, AP Leo, VZ Lib, V0868
Mon, V2612 Oph, ER Ori, MW Pav, BB Peg, V0407 Peg, AD Phe, AQ PSc, DZ Psc, Ou Ser, Y Sex, VY Sex, XX Sex, EQ Tau, V1128 Tau, AG Vir and NN Vir.
BAV Journal No. 093, April 2024
BAV results of observations 2023 - Visual maxima and minima of variabel stars
Author: Lienhard Pagel
Abstract: In this 100th compilation of BAV results, visual observations of variable stars, obtained mostly in the year 2023 are presented,
giving 121 maxima and 70 minima of eclipsing binaries, pulsating and eruptive stars.
BAV Journal No. 092, April 2024
ZTFJ070412.91-112403.2: A KH 15D like object with additional variability?
Authors: Klaus Bernhard, Peter Frank, Wolfgang Moschner, Udo Reffke
Abstract: ZTFJ070412.91-112403.2 exhibits characteristics and variability reminiscent of a KH 15D binary system accompanied by a circumbinary disk.
The corresponding ephemeris for this system is Min I = 2458238.8(5) + E* 34.57(2). However, there appears to be additional variability beyond what is typical
for a KH 15D object, potentially attributable to surrounding dust clouds.
BAV Journal No. 091, February 2024
Author: Lienhard Pagel
Abstract: In this 99th compilation of BAV results, photoelectric observations, obtained mostly in the year 2023 are presented giving 1483 minima and 1043 maxima.
BAV Journal No. 090, February 2024
The period of Fr151 Cyg = GSC 03949-01097
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: The variability of Fr151 Cyg was discovered by Peter Frank in 2011, who classified it as an eclipsing binary.
The authors published the discovery in 2019 in BAVJ No. 27. The authors present phased light curves from ASAS-SN and their own data,
a list of primary and secondary minima, O-C-diagrams and an improved period solution of the star.
BAV Journal No. 089, January 2024
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: The variability of NSVS 3936908 was discovered by Woźniak et al. in 2004 [1], who classified it as an eclipsing binary. The authors present
a phased light curve from their own data, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
BAV Journal No. 088, January 2024
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: The variability of V1457 Cyg was discovered by G. Romano in 1972, who classified it as an eclipsing binary.
The authors present phased light curves from ASAS-SN, from ZTF project and their own data, a list of primary and secondary minima,
O-C diagrams and an improved period solution of the star.
BAV Journal No. 087, January 2024
ZTFJ201538.86+362025.6: A candidate binary with strong reflection effect
Authors: Klaus Bernhard, Peter Frank, Wolfgang Moschner, Udo Reffke
Abstract: ZTFJ201538.86+362025.6 is a probable newly identified short-period eclipsing binary system exhibiting a pronounced reflection effect.
The associated ephemeris for this system is Min I = 2458280.9035(5) + E* 0.1714952(30).
BAV Journal No. 086, December 2023
BAV-Results of observations – transits of exoplanets in 2022
Authors: Manfred Rätz
Abstract: Eighty-eight results from the observation of 71 confirmed transit planets and 34 results from the observation of 33 planet candidates are documented.
These observations were conducted by observers affiliated with the BAV in the year 2022
BAV Journal No. 085, November 2023
The elements of Fr88 Cyg = WISE J200954.4+343108
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: The variability of Fr88 Cyg = WISE J200954.4+343108 was discovered by Peter Frank in 2009, who classified it as an eclipsing binary.
The authors present phased light curves from ASAS-SN [1], a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
BAV Journal No. 084, November 2023
The improved elements of MoV59 Cyg = UCAC3 284-159698
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: MoV59 Cyg = UCAC3 284-159698 was discovered by Wolfgang Moschner in 2016, who classified it as an eclipsing binary.
The first elements were published by the authors in 2018 [1] , and further observations until 2023 have now improved the elements.
BAV Journal No. 083, October 2023
The peculiar light curve of S CrB 2022-2023
Author: Matthias Kolb
Abstract: S CrB is a Mira star and was discovered in 1860 by Karl Henke (Marienwerder, Germany). The AAVSO database shows brightness data since 1864. The revised period
of the pulsation is 360.1 days, therefore 159 maxima can be identified to a reasonable accuracy. The average maximum brightness (visual and V band) is around 7 mag.
The 2022 maximum showed a record brightness of 5.2 mag (Visual, V band: 5.4) which is approx. three sigma above the average brightness. After that, the brightness declined
to 13.2 mag, not a record but very faint compared to previous minima. The 2023 maximum is around 8.2 mag which is the second faintest maximum ever and it was an
extraordinary flat one. All this can be statistical coincidence, but it is at least an amazing curiosity, if not a hint for more fundamental changes in the state of the star’s development.
BAV Journal No. 082, October 2023
The period of Fr259 Vul = ASASSN-V J203310.45+242300.9
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: The variability of Fr259 Vul = ASASSN-V J203310.45+242300.9 was discovered by Peter Frank in 2016, who classified it as an eclipsing binary.
The authors present phased light curves from ASAS-SN [1] and ATLAS [2], a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
BAV Journal No. 081, September 2023
The period of V2991 Cyg = Fr237 Cyg
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: V2991 Cyg = Fr237 Cyg was discovered by Peter Frank in 2012 and classified as an eclipsing binary.
The authors present phased light curves from ASAS-SN [1] and ZTF [8], a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
BAV Journal No. 080, September 2023
The period of V2976 Cyg = Fr196 Cyg
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: V2976 Cyg = Fr196 Cyg was discovered by Peter Frank in 2012 and classified as an eclipsing binary.
The authors present a phased light curve from ASAS-SN, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
BAV Journal No. 079, July 2023
A LIST OF MINIMA AND MAXIMA TIMINGS
Author: Anton Paschke
Abstract: The list contains 562 timings of minima of eclipsing and maxima of pulsating stars. It continues the list published in BAVJ 0063 (Paschke 2022).
BAV Journal No. 078, February 2023
Improved period of MoFr28 And = V803 And
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: MoFr28 And = V803 And was independently discovered in 2013 by Peter Frank and Martin Vrastek.
The authors published their discovery in BAV Rundbrief 2015 Nr. 2 [1] in 2015 with a first period and a phased light curve.
The variable has been regularly observed by Wolfgang Moschner until this year. The authors present a phased light curve from ASAS-SN,
a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
BAV Journal No. 077, January 2023
BAV results of observations 2022: Visual maxima and minima of pulsating and eruptive stars
Author: Lienhard Pagel
Abstract: In this 98th compilation of BAV results, visual observations of variable stars, obtained mostly in
the year 2022 are presented, giving 158 maxima and 103 minima of pulsating and eruptive stars.
BAV Journal No. 076, January 2023
BAV Results of observations 2022 - Photoelectric Minima/Maxima of Selected Eclipsing Binaries and Maxima/Minima of Pulsating Stars
Author: Lienhard Pagel
Abstract: In this 97th compilation of BAV results, photoelectric observations, obtained mostly in the year 2022 are presented giving 1654 minima and 1405 maxima.
BAV Journal No. 075, January 2023
The period of T-Cyg1-04350 = ASASSN-V J201147.10+515418.7
Authors: Wolfgang Moschner, Klaus Bernhard
Abstract: T-Cyg1-04350 was discovered by the TrES project [1] and classified as a eclipsing binary in 2008. The authors present a phased light curve from ASAS-SN,
a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
BAV Journal No. 074, January 2023
O-C Curves of 99 Cepheids
Author: Ralf Meyer
Abstract: This paper presents O-C-diagrams on 95 cepheid-type variable stars and on 4 W-Virginis-(CWA)- stars.
BAV Journal No. 073, January 2023
Maximum Times of 99 Cepheids
Numerical data and sources: Chepeids_All_Max_Times_Sources.txt
Author: Ralf Meyer
Abstract: In this paper, ca. 7000 times of maximum of 99 Cepheids are presented.
BAV Journal No. 072, January 2023
Period Variations of 99 Cepheid Variables
Author: Ralf Meyer
Abstarct: I evaluate times of maximum light of 99 cepheid variables from the times of discovery until about 2006 and give information on period changes. Annotated O-C diagrams are shown in the article BAVJ0074 “O-C Curves of 99 Cepheids” and can be used as a short summary of my findings on every single object.
The approximately 7000 maximum times the diagrams are based on are listed in the article BAVJ0073 “Maximum Times of 99 Cepheids” and will be part of the LcDB of the BAV.
BAV Journal No. 071, December 2022
Change of period and improved elements of the eclipsing binary Fr234 Vul = UCAC3 230-248078
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: Fr234 Vul = UCAC3 230-248078 was discovered by Peter Frank in the year 2009 and classified as EW eclipsing binary.
The authors present a phased light curve, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
The star is listed as variable in the ATLAS data bases.
BAV Journal No. 070, December 2022
Improved elements of the eclipsing binary Fr178 Aur = ASASSN-V J060836.30+515728.7
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: Fr178 Aur = ASASSN-V J060836.30+515728.7 was discovered by Peter Frank in the year 2011 and classified as EA eclipsing binary.
The authors present a phased light curve, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star. The variable is known at ASAS-SN and ATLAS.
BAV Journal No. 069, November 2022
BAV-Results of observations – transits of exoplanets in 2021
Author: Manfred Raetz
Abstract: 70 results of the observation of 57 transit planets are listed, which were obtained by observers of the BAV in 2021
BAV Journal No. 068, November 2022
The period of the eclipsing binary Fr190 = UCAC3 242-230799 Cyg
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: Fr190 = UCAC3 242-230799 Cyg was discovered by Peter Frank in the year 2015 and classified as an EA eclipsing binary.
The authors present a phased light curve, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
The object is also listed in the Atlas variable catalog, but with a period that does not match our observations.
BAV Journal No. 067, October 2022
The elements of Fr133 Vul = USNO-A2.0 1125-16097188
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: Fr133 Vul was discovered by Peter Frank and classified as RR-Lyrae-star in 2009. The authors present a phased light curve from the ASAS-SN project,
a list of own maxima, O-C diagrams and an improved period solution of the star.
BAV Journal No. 066, August 2022
V585 Vul (=Fr35 Vul ) with period jump
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: Fr35 Vul was discovered by Peter Frank and classified as short period eclipsing binary in 2008. The authors present a phased light curve, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
In 2017, a period jump occurred that can be clearly seen in the O-C diagram. The period has lengthened by approx. 0.49 seconds per orbit due to the period jump.
BAV Journal No. 065, June 2022
BH UMa - RRc type star with strong Blazhko effect
Authors: Berthold, Thomas, Agerer, Franz
BAV Journal No. 064, May 2022
The elements of Fr77 Aur = UCAC3 254-059161
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: Fr77 Aur was discovered by Peter Frank and classified as short period eclipsing binary in 2009. The authors present a phased light curve, a list of primary and secondary minima,
O-C diagrams and an im-proved period solution of the star. The variability of Fr77 Aur was discovered independently by Atlas as well as Chen et al, 2020.
The latter evaluated the data from the ZTF. Their period is also accessible via the VSX.
BAV Journal No. 063, May 2022
A LIST OF MINIMA AND MAXIMA TIMINGS
Author: Anton Paschke
Abstract: The list contains 299 timings of minima of eclipsing and maxima of pulsating stars. It continues the list published in BAVJ 0055 (Paschke 2021).
BAV Journal No. 062, April 2022
22 Years of Observations of V0505 Ser
Authors: Klaus Bernhard, Peter Frank, Wolfgang Moschner
Abstract: V0505 Ser is a short-period eclipsing variable RS CVn system discovered in 2005.
We report here new observations from 2020 and 2021 that extend the period of observations to 21 years and further support the previously suspected spot cycle
duration of about 5.5 years. Furthermore, we present the results of a detailed investigation of the O-C values of the entire observing span.
BAV Journal No. 061, February 2022
BAV-results of observations: Visual maxima and minima of pulsating and eruptive starsAbstract: In this 97th compilation of BAV results of visual observations of variable stars obtained mostly in the year 2021 are presented,
giving 162 maxima and 84 minima of pulsating and eruptive stars.
BAV Journal No. 060, February 2022
BAV-Results of observations - Photoelectric Minima/Maximaof Selected Eclipsing Binaries and Maxima/Minima of Pulsating Stars
Abstract: In this 96th compilation of BAV results, photoelectric observations obtained mostly in the year 2021 are presented giving 3324 minima and 1611 maxima.
BAV Journal No. 059, December 2021
The unusual period behavior of MoFr22 CygAuthors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: MoFr22 Cyg was discovered by Peter Frank and classified as EW type eclipsing binary in 2009. The discovery was published with first elements in BAV Journal 11 in 2016.
Supplementary observations up to the year 2021 show an unusual period behavior in the O-C diagram.
BAV Journal No. 058, December 2021
The period of Fr233 Vul
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: Fr233 Vul was discovered by Peter Frank and classified as EW type eclipsing binary in 2009. Our observations between 2009 and 2021 show an inconstant period.
BAV Journal No. 057, December 2021
New elements of MoV60 Cyg (Change of period)
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: MoV60 Cyg was discovered by Wolfgang Moschner and classified as EW type eclipsing binary in 2016. The discovery was published with first elements in BAVJ 21 in 2018.
Supplementary observations up to the year 2021 show a period change in the O-C diagram.
Author: Raetz, Manfred
Abstract: 91 results of the observation of 68 transit planets are listed, which were obtained by observers of the BAV in 2020.
A LIST OF MINIMA AND MAXIMA TIMINGS
Author: Anton Paschke
Abstract: The list contains 236 timings of minima of eclipsing and maxima of pulsating stars.
It continues the list published in BAVJ 0040 (Paschke 2020).
BAV Journal No. 054, July 2021
51 new γ Doradus stars from the ZTF survey
Author: Klaus Bernhard
Abstract: 51 new γ Doradus variables are presented, which were found in the Zwicky Transient Facility Catalog of Periodic Variable Stars.
This study confirms that high-amplitude multiperiodic γ Doradus variables with peak-to-peak amplitudes of 0.1 mag (V) and more are not rare objects.
BAV Journal No. 053, April 2021
BAV-results of observations:Visual maxima and minima of pulsating and eruptive stars BAVM 253
Author: Lienhard Pagel
Abstract: In this 95th compilation of BAV results of visual observations of variable stars obtained mostlyin the year 2020 are presented, giving 212 maxima and 122 minima of pulsating and eruptive stars.
BAV Journal No. 052, April 2021
Author: Lienhard Pagel
Abstract: In this 94th compilation of BAV results, photoelectric observations obtained mostly in the year2020 are presented giving 2430 minima and 1590 maxima.
BAV Journal No. 051, April 2021
Improved elements of the eclipsing binary ASASSN-V J205214.61+341019.6 Cyg
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: ASASSN-V J205214.61+341019.6 Cyg was discovered by the ASAS-SN-Project and classified as EB eclipsing binary. The authors present a phased light curve, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star. The object is also listed in the ZTF and Atlas variable catalogs, but with a period that does not match our observations exactly.
BAV Journal No. 050, April 2021
Improved elements of the eclipsing binary WISE J205119.0+343149 Cyg
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: WISE J205119.0+343149 Cyg was discovered by WISE-Project [1] and classified as EW eclipsing binary. The authors present a phased light curve, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star. The object is also listed in the ASAS-SN and Atlas variable catalogs, but with a period that does not match our observations exactly.
BAV Journal No. 049, February 2021
Improved elements of the eclipsing binary NSV 25369 Cyg
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: NSV 25396 is mentioned for the first time in the NSV Catalog [1] without a reference to type and period. The amplitude is given there as 0.9 mag (14.2-15.1 mag).
The object is listed in the ASAS-SN (Typ RRab) and Atlas (Type EA) variable catalogs, but with a period that does not exactly match our observations.
The authors present a phased light curve, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
BAV Journal No. 048, January 2021
Improved elements of the eclipsing binary MoV92 = UCAC3 193-019323
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: MoV92 Ori = UCAC3 193-019323 Ori was discovered by Wolfgang Moschner in the year 2016 and classified as EW eclipsing binary.
The authors present a phased light curve, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
The variable is known at ASAS-SN and ATLAS.
BAV Journal No. 047, December 2020
Improved elements of the new eclipsing binary Fr316 Cyg = UCAC3 244-166481
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: Fr316 Cyg = UCAC3 244-166481 Cyg was discovered by Peter Frank in the year 2011 and classified as EW eclipsing binary.
The authors present a phased light curve, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
The variable is known at ASAS-SN and ATLAS.
The period of the eclipsing binary Fr218 = UCAC3 238-156039 Lyr
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: Fr218 = UCAC3 238-156039 Lyr was discovered by Peter Frank in the year 2011 and classified as EA eclipsing binary.
The authors present a phased light curve, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
The variable is not listed in the ASAS-SN catalogue and VSX database. The period solution from the ATLAS catalogue is wrong.
BAV Journal No. 045, November 2020
The period of the eclipsing binary Fr257 = UCAC3 250-234427 Cyg
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: Fr257 Cyg = UCAC3 250-234427 Cyg was discovered by Peter Frank in the year 2013 and classified as EA eclipsing binary.
The authors present a phased light curve, a list of primary and secondary minima, O-C diagrams and an improved period solution of the star.
The variable is known at ASAS-SN and ATLAS.
BAV Journal Short-Notice No. 044, October 2020
Improved elements of Fr327 Cyg = UCAC3 249-201293
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: Fr327 Cyg = UCAC3 249-201293 was discovered by Peter Frank in the year 2018 and classified as EW eclipsing binary.
The authors present a phased light curve, a list of primary and secondary minima, O-C diagrams and improved elements of the star.
BAV Journal No. 043, October 2020
The period of the eclipsing binary Fr258 = GSC 02695-03684 Cyg
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: The authors present a phased light curve and a period solution of GSC 02695-03684 Cyg. GSC 02695-03684 Cyg was discovered by Peter Frank in 2016.
The variable is not listed in the ASAS-SN catalogue and the period solution from the ATLAS catalogue is wrong.
BAV Journal No. 042, September 2020
BAV-Results of observations – transits of exoplanets in 2019
Author: Manfrd Rätz
Abstracts: 49 results of the observation of 39 transit planets are listed, which were obtained by observers of the BAV in 2019.
BAV Journal No. 041, September 2020
The period of the eclipsing binary GSC 02134-00688 Lyr
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: The authors present a period solution and a phased light curve of GSC 02134-00688 Lyr. GSC 02134-00688 Lyr was discovered by Peter Frank in 2010.
The variable is not listed in the ASAS-SN catalogue and the period solution from the ATLAS catalogue is wrong. No Min II is discernible in our light curves.
BAV Journal No. 040, August 2020
A LIST OF MINIMA AND MAXIMA TIMINGS
Author: Anton Paschke
Abstract:The list contains 356 timings of minima of eclipsing and maxima of pulsating stars. It continues the list published in BAVJ 0030 (Paschke 2019).
BAV Journal No. 039, July 2020
Improved elements of the eclipsing binary ASASSN-V J190602.85+284752.5 Lyr
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: The authors present a phased light curve with the Min II and an improved period of ASASSN-V J190602.85+284752.5 Lyr.
The published periods from ASAS-SN and ATLAS could be significantly improved.
BAV Journal No. 038, July 2020
Improved elements of the eclipsing binary ASASSN-V J190646.62+293110.4 Lyr
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: The authors present a phased light curve and an improved period of ASASSN-V J190646.62+293110.4 Lyr. Because a weak Min II was discovered, the period
listed in the ASAS-SN catalogue had to be halved. In addition, the ATLAS period could be significantly improved.
BAV Journal No. 037, May 2020
Observations of RR Lyrae star IL Gem
Authors: Gisela Maintz, Wolfgang Moschner
Abstract: IL Gem is an RR Lyrae star of type RRab. It was discovered in 1963 by Hoffmeister but has been neglected for about 50 years. New observations were done by members of BAV at private observatories. New elements were calculated: 2458521.3446 + 0.4994505 *E
Abstract: 29 new variables have been found in the field of the RR Lyr star WW CrA which has been observed from 2013 to 2017. The new variables are the following: RMH-HMB-18 (UCAC4232-148844), RMH-HMB-19 (UCAC4 230-161913), RMH-HMB-20 (UCAC4 231-153888), RMH-HMB-21 (UCAC4 231-154077), RMH-HMB-22 (UCAC4 232-147029), RMH-HMB-23 (UCAC4 233-155707), RMH-HMB-24 (UCAC4 233-155936), RMH-HMB-25 (UCAC4 229-161252), RMH-HMB-26 (UCAC4 232-147348), RMH-HMB-27 (UCAC4 231-154898), RMH-HMB-28 (UCAC4 230-160837), RMH-HMB-29 (UCAC4 230-160877), RMH-HMB-30 (UCAC4 230-160978), RMH-HMB-31 (UCAC4 231-155216), RMH-HMB-32 (UCAC4 232-148032), RMH-HMB-33 (UCAC4 230-161242), RMH-HMB-34 (UCAC4 230-161258), RMH-HMB-35 (UCAC4 230-161340), RMH-HMB-36 (UCAC4 232-148444), RMH-HMB-37 (UCAC4 233-157277), RMH-HMB-38 (UCAC4 233-157415), RMH-HMB-39 (UCAC4 230-162017), RMH-HMB-40 (UCAC4 230-160089), RMH-HMB-41 (UCAC4 233-156541), RMH-HMB-42 (UCAC4 231-155679), RMH-HMB-43 (UCAC4 232-149041), RMH-HMB-44 (UCAC4 231-156279), RMH-HMB-45 (UCAC4 232-149297), RMH-HMB-46 (UCAC4 232-149330).
BAV Journal No. 035, May 2020
Authors: Wolfgang Moschner, Peter Frank, Klaus Bernhard
Abstract: The authors present a phased light curve and an improved period of GT Gem.
BAV Journal No. 034, April 2020
The new eclipsing binary UCAC3 221-061173, a system with eccentric orbit
Authors: Peter Frank, Wolfgang Moschner, Klaus Bernhard
Abstract: One new variable star (UCAC3 221-061173) is presented, which was found in a search for new variable stars in the fields of several known variables. ASAS-SN has independently discovered the variability of this object, but incorrectly assigned it to a different star.
BAV Journal No. 033, Feb. 2020
Author: Lienhard Pagel
Abstract: In this 93th compilation of BAV results, photoelectric observations obtained mostly in the year 2019 are presented giving 2943 minima and 2042 maxima.
BAVM 251
BAV Journal No. 032, Jan. 2020
First Elements for five New Variable Stars in Several Fields, Part IX
Authors: Peter Frank, Wolfgang Moschner, Klaus Bernhard
Abstarct: 5 new variable stars (UCAC3 238-155729, 2MASS J19042957+2926268, GSC 02134-00688, UCAC3 283-169273, 2MASS J19070964+2941427) are presented, which were found in a search for new variable stars in the fields of several known variables.
BAV Journal No. 031, Dec. 2019
BAV-Results of observations - Photoelectric Minima/Maxima
of Selected Eclipsing Binaries and Maxima/Minima of Pulsating Stars
Author: Lienhard Pagel
Abstract: In this 91th compilation of BAV results, photoelectric observations obtained mostly in the year 2018 are presented giving 2375 minima and 581 maxima.
BAVM 249
BAV Journal No. 030, Dec. 2019
A LIST OF MINIMA AND MAXIMA TIMINGS
Author: Anton Paschke
Abstract: The list contains minima of eclipsing and maxima of pulsating stars. It continues the list published in OEJV 0191 (Paschke 2018).
BAV Journal No. 029, Oct. 2019
20 Years of Observations of V505 Serpentii
Authors: Klaus Bernhard, Peter Frank, Stefan Hümmerich, Wolfgang Moschner
Abstract: V505 Ser is a short-period eclipsing RS CVn system discovered by Bernhard (2005).We here report on new unfiltered and BVRI observations taken in 2018 and 2019 that enlarge the time span of observations to 20 years and provide further evidence for the previously suspected spot cycle duration of about 5.5 years. The next maximum of activity will probably occur in 2020.
BAV Journal No. 028, July 2019
BAV-resultes of observations visual maxima and minima of pulsating and eruptive stars
Author: Lienhard Pagel
Abstract: In this 92th compilation of BAV results of visual observations of variable stars obtained mostlyin the year 2018 are presented, giving 54 maxima and 26 minima of pulsating and eruptive stars.
BAV Journal No. 027, March 2019
First Elements for nine New Variable Stars in Several Fields, Part VIII
Authors: Peter Frank, Wolfgang Moschner, Klaus Bernhard
Abstract: 9new variablestars(UCAC4 746-063569, UCAC4 744-062087, UCAC4 744-062456, UCAC4 742-065437, UCAC4 744-062753, UCAC4 744-061946, UCAC4 744-062788, UCAC4 746-063980, UCAC4 747-061302) are presented, which were found in a search for new variable stars in the fields of several known variables.
BAV Journal No. 026, March 2019
8 New Variable Stars in ASAS-SN and CRTS database. Part III
Author: I. Sergey
Abstract: Eight new variable stars are presented which were found in the ASAS-SN database: USNO-B1.0 1620-0173561, USNO-B1.0 1551-0259648, USNO-B1.0 1529-0028802, USNO-B1.0 1611-0016625, USNO-B1.0 0972-0354789, GSC 03685-01926, GSC 03708-00640, GSC 04038-00558.
BAVJournal No. 025, March 2019
Revision Variable Stars. Part 1
Author: I. Sergey
Abstract: I present the results of the revision of 25 poorly studied variable stars of the following types, according to the notation of VSX: S, VAR, CST, MISC. Among the VAR-objects wereselected stars without periods
BAV Journal No. 024, May 2018
BAV-resultes of observations Visual maxima and minima of pulsating and eruptive stars
Author: Lienhard Pagel
Abstract: In this 90th compilation of BAV results of visual observations of variable stars obtained mostly in the year 2017 are presented, giving 149 maxima and 80 minima of pulsating and eruptive stars
BAV Journal No. 023, May 2018
First Elements for five New Variable Stars in Several Fields, Part VII
Authors: Peter Frank, Wolfgang Moschner, Klaus Bernhard
Abstract: 6 new variable stars (UCAC3 236-213160, UCAC3 236-212219, UCAC3 238-156799, UCAC4 597-069471; UCAC3 238-157541) are presented, which were found in a search for new variable stars in the fields of several known variables.
BAV Journal No. 22: July 2018
New Red Variable Stars in ASAS-SN database. Part 2.
Author: I. Sergey
Abstract: 20 new red variable stars are presented, which were found in the ASAS-SN database: 2MASS J19262479+0829055, 2MASS J20421894+2812211, 2MASS J20392002+2250217, 2MASS J20340351+2609349, 2MASS J20300680+1958584, 2MASS J20282826+2840274, 2MASS J20280514+2452594, 2MASS J18054024+2542318, 2MASS J20253003+2058298, 2MASS J20543096+1031316, 2MASS 18500459+1935329, 2MASS J20290482+2853035, 2MASS J20285155+2438348, 2MASS J18394029+2032390, 2MASS J20254512+1955457, 2MASS J18253167+0254356, 2MASS J18265819+1220067, 2MASS J18333406+1945563, 2MASS J18333935+1310426, 2MASS J07095965+0017197.
BAV Jornal No. 021, Feb. 2018
First Elements for six New Variable Stars in Several Fields, Part VI
Authors: P. Frank, W. Moschner, K. Bernhard
Abstract: 6 new variable stars (UCAC3 284-221990, UCAC3 284-159698, UCAC3 285-155734, UCAC3 239-159278, UCAC4 598-071837; GSC 02135-00056) are presented, which were found in a search for new variable stars in the fields of several known variables.
BAV Jornal No. 020, Feb. 2018
New variables in ASAS-SN Database. Part 1
Author: I. Sergey
Abstract: 12 new variable stars are presented, which were found in the ASAS-SN database:GSC 04411-02027, GSC 03568-00294, USNO-B1.0 1414-0310345, USNO-B1.0 1414-0311251, GSC 03933-01423, USNO-B1.0 1410-0293235, GSC 04205-02116, USNO-B1.0 1517-0289620, GSC 04255-01111, GSC 04222-01778, GSC 04444-01262, USNO-B1.0 1587-0156583.
BAV Jornal No. 019, Jan. 2018
New variable stars in the Milky Way found in the summer and autumn of 2017
Author: I. Sergey
Abstract: This article presents 6 new eclipsing and 1 pulsation stars, which were discovered in a search for new variables on the basis of a private astronomical observatory in Molodechno, Belarus.
BAV Jornal No. 018, Jan. 2018
First Elements for six New Variable Stars in Perseus, Part V
Authors: P. Frank, W. Moschner, K. Bernhard
Abstract: 6 new variable stars (GSC 03717-00153, UCAC3 285-064742, UCAC3 286-064382, UCAC3 285-064533, UCAC3 285-064904, UCAC3 285-064219) are presented, which were found in a search for new variable stars in the fields of several known variables
BAV Jornal No. 017, Oct. 2017
First Elements for six New Variable Stars in Several Fields, Part IV
Authors: P. Frank, W. Moschner, K. Bernhard
Abstract: 6 new variable stars (GSC 02134-00028, GSC 02134-01608, GSC 02134-00590,UCAC3 238-155503, GSC 02671-02330, GSC 02670-02219) are presented, which were found in a search for new variable stars in the fields of several known variables.
BAV Journal No. 016, June 2017
First Elements for six New Variable Stars in Several Fields, Part III
Authors: P. Frank, W. Moschner, K. Bernhard
Abstract: 6 new variable stars (GSC 2695-03472, UCAC3 249-234814, GSC 2696-02034, UCAC3 284-090447, UCAC3 284-091086, UCAC3 284-090934) are presented, which were found in a search for new variable stars in the fields of several known variables.
BAV Journal No. 015, March 2017
Six new W UMa type eclipsing binaries in the field of DE Lac
Author: G. Monninger
Abstract: USNO-B1.0 1307-0466878, 1304-0469894, 1303-0467062, 1308-0467803, 1310-0458562 and 1313-0462253 were identified as eclipsing binaries for the first time. The shape and amplitude of the light curve and the period implies that all new variables are short-period W UMa type eclipsing binaries.
BAV Journal No. 014, Jan 2017
Author: Joachim Hübscher
Abstract: In this 88th compilation of BAV results, visual observations of 113 variable stars obtained mostly in the years 2015 and 2016 are presented, giving 316 maxima and minima of eclipsing binaries, pulsating and eruptive stars.
BAV Journal No. 013, Jan 2017
BAV-results of observations - Photoelectric maxima and minima of pulsating stars
Author: Joachim Hübscher
Abstract: In this 87th compilation of BAV results. photoelectric observations obtained mostly in the years 2015 and 2016 are presented on 99 variable stars giving 682 maxima and minima on pulsating stars.
BAV Journal No. 012, Jan 2017
First elements for new Eclipsing Binaries in several fields, Part II
Authors: Peter Frank, Wolfgang Moschner and Klaus Bernhard
Abstract: 6 new eclipsing binaries (GSC 02111 00334, GSC 02695 03163, 3UCAC250-231289, GSC 03948-02316, 3UCAC251-232593, 3UCAC251-231400) are presented, which were found in a search for new variable stars in the fields of several known variables.
BAV Journal No. 011, Oct 2016
First elements for six new Eclipsing Binaries in several fields
Authors: Wolfgang Moschner, Peter Frank and Klaus Bernhard
Abstract: 6 new eclipsing binaries (3UCAC 275-153185, 3UCAC 205-282753, 3UCAC246-056307 3UCAC 286-155544, GSC 3937-02349, 3UCAC 273-264245) are presented, which were found in a search for new variables in several fields of known variables.
BAV Journal No. 010 (R2), Sept 2016
A New Sample of Mid-Infrared Bright, Long-Period Mira Variables from the MACHO Galactic Bulge Fields
Authors: Klaus Bernhard, Stefan Uttenthaler, Stefan Hümmerich
Abstract: Mid-infrared bright objects in the direction of the Galactic Bulge were investigated using time series photometry from the MACHO data archive, which led to the discovery of a large number of long-period variables. Among these, a total of 192 bona-fide Mira variables was identified, which – to the best of our knowledge – are reported here for the first time. Together with the results from our previous investigations, we thereby bring the number of Mira variables found in the MACHO Galactic Bulge fields to a new total of 1286 stars. Light curves, folded light curves and summary data for all new Mira variables are presented and their properties in colour-colour, period-colour and period-luminosity space are investigated. In agreement with our expectations, the present sample of mid-infrared bright objects is composed mostly of luminous, long-period variables.
BAV Journal No. 009, Sept 2016
Photoelectric minima of BR Cygni and maxima and minima of V2367 Cygni
Authors: Lienhard Pagel and Joachim Hübscher
Abstract: In this 85th compilation of BAV results photoelectric observations obtained by Kepler space observatory in the years 2009 till 2013 are presented on one eclipsing binary and one RR-Lyrae-Star giving 9,232 maxima and minima.
Data:
BAVJ009_data_R3.txt BAVJ009_data_description_R3.pdf
BAV Journal No. 008, May 2016
Four new Eclipsing Binaries in the field of DP CMa
Aothors: Wolfgang Moschner und Klaus Bernhard
Abstract: 4 new eclipsing binaries (3UCAC 146-060990, 3UCAC 146-061534, 3UCAC 145-061591, 3UCAC 146-061594) are presented, which were found in a search for new variables in the field of DP CMa.
BAV Journal No. 007, May 2016
Another dozen of new Eclipsing Binarys
Author: Franz Agerer
Abstract: This paper continues the line of publications of new detected variable stars, which has begun with BAVJ No. 4. In the course of my investigation of known variable stars on a regular basis, nearby stars are sometimes detected as variables.
Data:
BAVJ007_01_hel BAVJ007_02_hel BAVJ007_03_hel BAVJ007_04_hel BAVJ007_05_hel BAVJ007_06_hel
BAVJ007_07_hel BAVJ007_08_hel BAVJ007_09_hel BAVJ007_10_hel BAVJ007_11_hel BAVJ007_12_hel
BAV Journal No. 006, May 2016
AAVSO-BAV-ARAS Campaign:
Photometry and Spectroscopy of P Cygni Cyclic Variation (Period 310 day) of the intrinsic Hα line flux
Intermediate Report 2016
Author: Ernst Pollmann
Abstract: With the combined campaign of the Luminous Blue Variablestar P Cyg, we are trying for the first time by way of simultaneous measurements of photometrical Vbrightness and Hα equivalent width (EW), to realize a long-term monitoring of the intrinsic Hα line flux. To find out if and how the flux obtained from the spectral line profiles varies, the EW measurements is corrected for the effect of variation of the continuum flux. The photometrical observers of the AAVSO, observer of the BAV and spectroscopical observer of the ARAS group started this campaign in November 2008 in order to continue former investigations[1] & [2],whose results are based on multi-daily averaging of Vmag and EW. We receive with our data a reliable reference of a clear dominant period of 310 day of the intrinsic flux of the Hα emission.
BAV Journal No. 005, April 2016
Author: Franz Agerer
Abstract: This paper continues the line of publications of new detected variable stars, which has begun with BAVJ Nr. 4. In the course of my investigation of known variable stars on a regular basis, nearby stars are sometimes detected as variables.
Data:
BAVJ005_01_hel BAVJ005_02_hel BAVJ005_03_hel BAVJ005_04_hel BAVJ005_05_hel BAVJ005_06_hel
BAVJ005_07_hel BAVJ005_08_hel BAVJ005_09_hel BAVJ005_10_hel BAVJ005_11_hel BAVJ005_12_hel
BAV Journal No. 004, April 2016
New eclipsing binary in Lacerta
Author: Franz Agerer
Abstract: In the course of my investigation of known variable stars on a regular basis, nearby stars are sometimes detected as variables. One of these is USNO-B1.0 1443-0412484 in the vicinity of EP Lacerta.
BAV Journal No. 003, February 2016
Author: Joachim Hübscher
BAV Mitteilungen No. 242 January 2016
Abstract: In this 84th compilation of BAV results, visual observations obtained mostly in the years 2014 and 2015 are presented on 101 variable stars giving 276 maxima and minima on eclipsing binaries, pulsating and eruptive stars.
BAVJ003_data.txt BAVJ_Data-description_R1.pdf
BAV Journal No. 002, January 2016
BAV-results of observations Photoelectric maxima and minima of pulsating stars
Author: Joachim Hübscher
BAV Mitteilungen No. 240 January 2016
Abstract: In this 82nd compilation of BAV results, photoelectric observations obtained mostly in the years 2014 and 2015 are presented on 98 variable stars giving 766 maxima and minima on pulsating stars.
BAVJ002_data.txt BAVJ_Data-description_R1.pdf
BAV Journal No. 001, January 2016
Author: Rainer Gröbel
Abstract: By analysis of SWASP and CRTS data, Bernhard et al. (2013) have recently shown that GSC 03529-02286 (18 14 48.187 +47 10 03.12, J2000) is an RRc type variable showing indications of Blazhko effect. A night by night reanalysis of SWASP data yielded 70 maxima and 73 minima times which revealed a Blazhko period PB = 20.26 d. CCD observations on 13 nights in August 2013 yielded another 11 maxima and 4 minima times, covering a little more than one Blazhko cycle. It could be shown that the secondary period prevails until now. The ephemeris for the maxima could be improved to
HJD (Max.) = 2456495.4317(37) + 0.27719643(46) d x E.
The CCD observations also revealed a short period eclipsing variable in the vicinity (GSC2.3 N0ZY002187; 18 14 26.76 +47 19 09.38, J2000) showing shallow 0.15 mag. deep eclipses with the ephemeris HJD (Min.) = 2456493.3980(6) + 0.340055(12) x E.