J/ApJ/691/306 Photometry of RR Lyrae candidates in Virgo stream (Prior+, 2009)
Extending the Virgo stellar stream with SEKBO survey RR Lyrae stars.
Prior S.L., Da Costa G.S., Keller S.C., Murphy S.J.
<Astrophys. J., 691, 306-319 (2009)>
=2009ApJ...691..306P 2009ApJ...691..306P
ADC_Keywords: Stars, variable ; Photometry, VRI ; Surveys
Keywords: Galaxy: halo - Galaxy: kinematics and dynamics - Galaxy: structure -
stars: variables: other
Abstract:
A subset of the RR Lyrae (RRL) candidates identified from the Southern
Edgeworth-Kuiper Belt Object (SEKBO) survey data have been followed up
photometrically (n=106) and spectroscopically (n=51). Period and light
curve fitting reveals a 24±7% contamination of SEKBO survey data by
non-RRLs. This paper focuses on the region of the Virgo Stellar Stream
(VSS), particularly on its extension to the south of the declination
limits of the Sloan Digital Sky Survey and of the Quasar Equatorial
Survey Team (QUEST) RRL survey.
Description:
Targets were selected from a list of 2016 candidates produced by
Keller et al. (2008, Cat. J/ApJ/678/851) who searched the SEKBO survey
data for RRLs. The SEKBO survey was conducted on the 50" telescope at
Mount Stromlo Observatory between 2000 January and 2003 January and
covered a 10° wide band following the ecliptic (1675deg2 of
imaging data). Two filters ("blue": 455-590nm and "red": 615-775nm)
were used simultaneously.
Photometric observations were made with the Australian National
University (ANU) 40" telescope at Siding Spring Observatory (SSO)
over six six-night runs between 2006 November and 2007 October.
Spectroscopic observations were made with the ANU 2.3m telescope at
SSO in runs that were concurrent with those on the 40" telescope.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 84 106 Photometric data summary
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See also:
J/ApJ/678/851 : RR Lyrae survey in the Galactic Halo (Keller+, 2008)
J/AJ/132/714 : QUEST RR Lyrae survey. II. Halo overdensities (Vivas+, 2006)
J/AJ/127/1158 : QUEST RR Lyrae Survey first catalog (Vivas+, 2004)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- [KMP2008] Object identification
(<[KMP2008] NNNNNN.NNNNN> in Simbad)
13- 14 I2 h RAh Hour of Right Ascension (J2000)
16- 17 I2 min RAm Minute of Right Ascension (J2000)
19- 23 F5.2 s RAs Second of Right Ascension (J2000)
25 A1 --- DE- Sign of the Declination (J2000)
26- 27 I2 deg DEd Degree of Declination (J2000)
29- 30 I2 arcmin DEm Arcminute of Declination (J2000)
32- 36 F5.2 arcsec DEs Arcsecond of Declination (J2000)
38- 42 F5.2 mag Average V band magnitude
44- 48 F5.2 mag Average R band magnitude
50- 55 F6.3 mag <V-R>0 Average dereddened (V-R) color index
57- 58 I2 --- Nobs Number of observations of object
60- 72 A13 --- Class Classification
74- 78 F5.3 d Per ? Period
80- 84 F5.3 mag Vamp ? V-band amplitude
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 22-Feb-2011