J/AJ/129/2663 B photometry of M31 variable star candidates (Williams+, 2005)
Variable star candidates in an advanced camera for surveys field of M31.
Williams B.F.
<Astron. J., 129, 2663-2669 (2005)>
=2005AJ....129.2663W 2005AJ....129.2663W
ADC_Keywords: Stars, variable ; Photometry, HST
Keywords: galaxies: individual (M31) - galaxies: stellar content -
stars: variables: other
Abstract:
A search for variable stars is performed using two epochs of Hubble
Space Telescope Advanced Camera for Surveys imaging data for a
9.28arcmin2 portion of M31. This data set reveals 254 sources that
vary by at least 4σ between epochs. The positions and two-epoch
B-band (equivalent) photometry of these sources are presented.
Description:
The data used for this project were originally obtained as part of a
program to find the optical counterparts for X-ray novae in M31
(Williams et al. 2005ApJ...620..723W 2005ApJ...620..723W). I obtained two sets of HST ACS
data, one observed at UT 21:35 on 2003 December 3 and one observed at
UT 16:38 on 2004 March 1.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 77 254 Variable stars in the ACS field
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See also:
J/A+A/402/113 : (RI)c photometry of variables in M31 (Joshi+, 2003)
J/A+A/421/509 : AGAPE catalogue of M31 variables (Ansari+, 2004)
J/ApJS/154/623 : M31 Long Period Variables : Photometry (Mould+, 2004)
J/MNRAS/351/1071 : POINT-AGAPE Survey. M31 variables (An+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- M31ACSV The M31ACSV name (JHHMMSS.s+DDMMSS)
18 I1 h RAh Hour of Right Ascension (J2000)
20- 21 I2 min RAm Minute of Right Ascension (J2000)
23- 28 F6.3 s RAs Second of Right Ascension (J2000)
29 A1 --- DE- Sign of the Declination (J2000)
30- 31 I2 deg DEd Degree of Declination (J2000)
33- 34 I2 arcmin DEm Arcminute of Declination (J2000)
36- 40 F5.2 arcsec DEs Arcsecond of Declination (J2000)
42 A1 --- l_B1mag Limit flag on B1mag
43- 47 F5.2 mag B1mag HST 03 Dec 2003 F435W filter VEGAMAG magnitude
49- 52 F4.2 mag e_B1mag ? Uncertainty in B1mag
54 A1 --- l_B2mag Limit flag on B2mag
55- 59 F5.2 mag B2mag HST 01 Mar 2004 F435W filter VEGAMAG magnitude
61- 64 F4.2 mag e_B2mag ? Uncertainty in B2mag
66 A1 --- l_B1-B2 Limit flag on B1-B2
67- 71 F5.2 mag B1-B2 The (B1mag - B2mag) brightness change
73- 76 F4.2 mag e_B1-B2 ? Uncertainty in B1-B2
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 10-Oct-2005