BAV Journal                                                              ISSN: 2366-6706

Publisher: Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.V.
Munsterdamm 90  12169 Berlin,    Germany

https://www.bav-astro.eu

Editor:  Lienhard Pagel
Co-Editor:  Wolfgang Moschner


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 und 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

BAV-results of observations - Visual maxima and minima of eclipsing binaries, pulsating and eruptive stars

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 

Twelve new Eclipsing Binaries

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.

BAVJ004_data_hel.txt


BAV Journal No. 003, February 2016

BAV-results of observations Visual maxima and minima of eclipsing binaries, pulsating and eruptive stars

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

Light curve and period of the Blazhko RRc star GSC 03529-02286 and GSC 2.3 N0ZY002187, a new variable in the field

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.


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