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J/AN/336/590       Bochum Galactic Disk Survey: II         (Hackstein+, 2015)

The Bochum Survey of the Southern Galactic Disk: II. Follow-up measurements and multi-filter photometry for 1323 square degrees monitored in 2010-2015. Hackstein M., Fein C., Haas M., Ramolla M., Pozo Nunez F., Barr Dominguez A., Kaderhandt L., Thomsch K., Niedworok N., Westhues C., Chini R. <Astron. Nachrichten 336, 590 (2015)> =2015AN....336..590H (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Milky Way ; Photometry, SDSS ; Photometry, UBV Keywords: surveys - stars: variables: general - techniques: photometric Abstract: This paper is the second in a series describing the southern Galactic Disk Survey (GDS) performed at the Universitatssternwarte Bochum near Cerro Armazones in Chile. Haas et al. (2012, Cat. J/AN/333/706, Paper I) presented the survey design and the characteristics of the observations and data. They identified ∼2200 variable stars in an area of 50 square degrees with more than 50 observations in 2011. Here we present the first complete version of the GDS covering all 268 fields with 1323 square degrees along the Galactic disk including revised data from Paper I. The individual fields were observed up to 272 times and comprise a maximum time span between September 2010 and May 2015. We detect a total of 64151 variable sources, which are presented in a catalog including some of their properties and their light curves. A comparison with the International Variable Star Index (VSX) and All Sky Automated Survey (ASAS) indicates that 56794 of these sources are previously unknown variables. Furthermore, we present U, B, V, r', i', z' photometry for all sources within the GDS, resulting in a new multi-color catalog of nearly 16x106 sources detected in at least one filter. Both the GDS and the near-infrared VISTA Variables in the Via Lactea survey (VVV) complement each other in the overlap area of about 300 square degrees enabling future comparison studies. Description: Three tables are provided containing the results of the May 2015 release of the Bochum Galactic Disk Survey (GDS). Those comprise the determined parameters for all variable sources, the light curves of the variable sources, as well as the average brightnesses of all GDS sources. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file varlc.dat 128 6945239 Light curves of all variable sources in r and i varsum.dat 297 64151 Summary file of variable properties allavg.dat 49 95330976 Median magnitudes of all GDS sources in UBVriz
See also: B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014) II/264 : ASAS Variable Stars in Southern hemisphere (Pojmanski+, 2002-05) II/337 : VISTA Variables in the Via Lactea Survey DR1 (Minniti+, 2014) J/AN/333/706 : Bochum survey of the southern Galactic disk (Haas+, 2012) Byte-by-byte Description of file: varlc.dat
Bytes Format Units Label Explanations
1- 55 A55 --- Field GDS Field 57- 65 F9.5 deg RAdeg Right Ascension (J2000) 67- 75 F9.5 deg DEdeg Declination (J2000) 77- 95 A19 --- ID GDS Variable ID, GDS_JHHMMSSs+DDMMSS 97-107 F11.5 d MJD Modified Julian Date 109-111 A3 --- Filter [r_s i_s] Filter (G1) 113-120 F8.5 mag mag Magnitude in filter 122-128 F7.5 mag e_mag Magnitude Error
Byte-by-byte Description of file: varsum.dat
Bytes Format Units Label Explanations
1- 55 A55 --- Field GDS field name 57- 75 A19 --- ID GDS Variable ID, GDS_JHHMMSSs+DDMMSS 77- 85 F9.5 deg RAdeg Mean right ascension (J2000) 87- 95 F9.5 deg DEdeg Mean declination (J2000) 97-105 F9.5 deg RArdeg ? r-band right ascension (J2000) 107-115 F9.5 deg DErdeg ? r-band declination (J2000) 117-125 F9.5 deg RAideg ? i-band right ascension (J2000) 127-135 F9.5 deg DEideg ? i-band declination (J2000) 137 A1 --- Grade [A-C] GDS grade (1) 139-141 I3 --- o_rmag Number of measurements in r 143-145 I3 --- o_imag Number of measurements in i 147-151 F5.2 mag rmag ? Median light curve magnitude in r 153-157 F5.3 mag s_rmag ? Non-variable equivalent standard deviation in r 159-163 F5.3 mag e_rmag ? Non-variable equivalent median absolute deviation in r 165-169 F5.2 mag imag ? Median light curve magnitude in i 171-175 F5.3 mag s_imag ? Non-variable equivalent standard deviation in i 177-181 F5.3 mag e_imag ? Non-variable equivalent median absolute deviation in i 183 I1 --- qflagr ? SourceExtractor quality flag in r 185 I1 --- qflagi ? SourceExtractor quality flag in i 187-190 F4.2 mag AmpMax Maximum amplitude (2) 192 I1 --- f_Ampr [0/1]? Amplitude flag in r (3) 194 I1 --- f_Ampi [0/1]? Amplitude flag in i (3) 196-199 F4.2 mag Ampr ? Light curve amplitude in r 201-204 F4.2 mag Ampi ? Light curve amplitude in i 206-209 F4.2 mag athrr ? Detection threshold for amplitude method in r 211-214 F4.2 mag athri ? Detection threshold for amplitude method in i 216-221 F6.2 --- JStetmax Maximum Stetson-J (2) 223 I1 --- f_JStetr [0/1]? Stetson-J flag in r (3) 225 I1 --- f_JSteti [0/1]? Stetson-J flag in i (3) 227-232 F6.2 --- JStetr ? Light curve Stetson-J in r 234-239 F6.2 --- JSteti ? Light curve Stetson-J in i 241-244 F4.2 --- Jthrr ? Detection threshold for Stetson-J method in r 246-249 F4.2 --- Jthri ? Detection threshold for Stetson-J method in i 251-256 F6.4 mag sdMax Maximum standard deviation (2) 258 I1 --- f_sdr [0/1]? Standard deviation flag in r (3) 260 I1 --- f_sdi [0/1]? Standard deviation flag in i (3) 262-267 F6.4 mag sdr ? Light curve standard deviation in r 269-274 F6.4 mag sdi ? Light curve standard deviation in i 276-281 F6.4 mag sdthrr ? Detection threshold for standard deviation method in r 283-288 F6.4 mag sdthri ? Detection threshold for standard deviation method in i 290 I1 --- VSXMatch [0/2] Source found in VSX (4) 292-297 I6 --- VSXOID ? VSX internal identifier
Note (1): GRADE can be A, B, or C with decreasing variability detection quality. Note (2): Maximum value of both filters Note (3): Standard deviation flag as follows: 0 = a variability detection with method was negative 1 = positive Note (4): Source found in VSX flag as follows: 0 = no match has been found in the AAVSO International Variable Star Intex 1 = match in the AAVSO International Variable Star Intex
Byte-by-byte Description of file: allavg.dat
Bytes Format Units Label Explanations
1- 9 F9.5 deg RAdeg Right Ascension (J2000) 11- 19 F9.5 deg DEdeg Declination (J2000) 21- 23 A3 --- Filter Filter (G1) 25- 30 F6.3 mag mag ? Magnitude in filter 32- 36 F5.3 mag e_mag ? Magnitude Error 38- 42 F5.3 mag Amp ? Maximum amplitude of measurements in filter 44- 45 I2 --- qflag [0/18]? SExtractor quality flag in filter 47- 49 I3 --- N ? Number of measurements in filter
Global notes: Note (G1): Fister systems: Uj,Bj,V_j: Johnson-Cousins rs,is,z_s: Sloan
Acknowledgements: Moritz Hackstein, hackstein(at)astro.rub.de This research has made use of the International Variable Star Index (VSX) database, operated at AAVSO, Cambridge, Massachusetts, USA. References: Bertin & Arnouts, 1996A&AS..117..393B for information on SourceExtractor
(End) Moritz Hackstein [AIRUB], Patricia Vannier [CDS] 12-Nov-2015
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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