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J/ApJ/678/851        RR Lyrae survey in the Galactic Halo      (Keller+, 2008)

Revealing substructure in the Galactic Halo: the SEKBO RR Lyrae survey. Keller S.C., Murphy S., Prior S., Dacosta G., Schmidt B. <Astrophys. J., 678, 851-864 (2008)> =2008ApJ...678..851K
ADC_Keywords: Photometry, VRI ; Stars, variable ; Stars, distances Keywords: Galaxy: halo - Galaxy: structure - stars: variables: other Abstract: We present a search for RR Lyrae variable stars from archival observations of the Southern Edgeworth-Kuiper Belt Object survey. The survey covers 1675deg2 along the ecliptic to a mean depth of V=19.5, i.e., a heliocentric distance of ∼50kpc for RR Lyrae stars. The survey reveals 2016 RR Lyrae candidates. Follow-up photometric monitoring of a subset of these candidates shows ∼24% contamination by non-RR Lyrae variables. We derive a map of overdensity of RR Lyrae stars in the halo that reveals a series of structures coincident with the leading and trailing arms of debris from the Sagittarius dwarf galaxy. One of the regions of overdensity is found on the trailing arm, 200° from the main body of the Sagittarius dwarf at a distance of ∼45kpc. This distant detection of the stellar population of the outer trailing arm of Sagittarius offers a tight constraint on the motion of the dwarf galaxy. A distinctly separate region of overdensity is seen toward the Virgo overdensity. Description: The present study is based on the archived observations of the Southern Edgeworth-Kuiper Belt Object (SEKBO) survey (Moody et al. 2003EM&P...92..125M). SEKBO was a multiepoch, two-color imaging survey of a 10° band centered on the ecliptic. Observations were obtained over the 3 years from December 1999 on the Mount Stromlo Observatory 50 inch (1.27) Great Melbourne Telescope that was previously used for the MACHO microlensing survey. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 60 2016 Table of RR Lyrae candidates found in the present work
See also: J/MNRAS/375/1381 : Kinematics of RR Lyr and HB stars in NGP (Kinman+, 2007) J/AJ/132/714 : QUEST RR Lyrae survey. II. Halo overdensities (Vivas+, 2006) J/A+A/375/909 : RR Lyrae stars in the Sgr dwarf (Cseresnjes 2001) J/A+A/357/871 : RR Lyrae stars in the Sgr dwarf galaxy (Cseresnjes+, 2000) J/AcA/48/113 : OGLE RR Lyrae VI photometry (Udalski, 1998) J/AJ/115/168 : Kinematics of red giant and RR Lyrae stars (Chiba+ 1998) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 12 A12 --- objID [0-9. ] Object identification 14- 15 I2 h RAh Hour of Right Ascension (J2000) 17- 18 I2 min RAm Minute of Right Ascension (J2000) 20- 24 F5.2 s RAs Second of Right Ascension (J2000) 26 A1 --- DE- Sign of the Declination (J2000) 27- 28 I2 deg DEd Degree of Declination (J2000) 30- 31 I2 arcmin DEm Arcminute of Declination (J2000) 33- 37 F5.2 arcsec DEs Arcsecond of Declination (J2000) 39- 43 F5.2 mag Vmag The V band magnitude (transformed to Landolt) 45- 49 F5.2 mag V-R The (V-R) color index 51- 55 F5.3 mag E(V-R) The (V-R) color excess 57- 60 F4.1 kpc DistH Heliocentric distance
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 20-Sep-2010
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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