Access to Astronomical Catalogues

← Click to display the menu
J/A+A/357/871       RR Lyrae stars in the Sgr dwarf galaxy   (Cseresnjes+, 2000)

Structure of the Sagittarius dwarf galaxy at low Galactic latitudes. Cseresnjes P., Alard C., Guibert J. <Astron. Astrophys., 357, 871-880 (2000)> =2000A&A...357..871C
ADC_Keywords: Stars, variable ; Magnitudes Keywords: stars: variables: RR Lyr - galaxies: individual: Sagittarius - galaxies: dwarf - galaxies: Local Group Abstract: We carried out a search for RR Lyrae stars towards the Sagittarius dwarf galaxy based on two series of photographic Schmidt plates. This search yielded 4013 RR Lyrae stars (3947 mono-periodic, and 66 multi-periodic) spread over ∼50 square degrees between Galactic latitudes b=-4° and b=-15°. The analysis of this catalog of RR Lyraes allowed us to map the structure of the Sagittarius dwarf galaxy behind the high density of Galactic foreground stars (this paper, Paper I), and to study the properties of the old stellar population in the Sgr dwarf (Paper II, Cseresnjes, 2001, Cat. J/A+A/375/909). Description: The catalog of single-period RR Lyraes is composed of two tables, one for each field: - filed1.dat for variables detected in field 1 (SAG) centered on (l,b)=(6.6°, -10.8°). The photometry of these RR Lyraes is based on a combination of a Kodak Tech-Pan 4415 film with a BG12 filter. - field2.dat for variables detected in field 2 (DUO) centered on (l,b)=(3.1°, -7.1°). The photometry is based on the Bj system. It is important to note that the photometric systems are different between the two fields (see paper I & II for details). The magnitude and amplitude are therefore not directly comparable from one field to another. The RR Lyrae stars of this catalog are almost evenly distributed between the Sagittarius dwarf and the Galaxy. They are easily separated through an histogram of the magnitudes (see Paper I). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file field1.dat 52 2330 Single-period RR Lyraes in field 1 (SAG) field2.dat 52 1617 Single-period RR Lyraes in field 2 (DUO) lc/* 24 73 Light curves
See also: J/A+A/375/909 : RR Lyrae stars in the Sgr dwarf (Paper II) (Cseresnjes 2001) Byte-by-byte Description of file: field1.dat field2.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Name Variable identifier 11- 19 F9.6 h RAhour Right ascension (J2000) 21- 29 F9.5 deg DEdeg Declination (J2000) 31- 37 F7.5 d Per Period of the variable 39- 42 F4.2 mag Amp Amplitude of the light curve 44- 47 F4.1 mag Bmag Photographic B magnitude 49- 52 A4 --- VarType Type of the variable (either RRab or RRc)
Byte-by-byte Description of file: lc/*
Bytes Format Units Label Explanations
1- 13 F13.5 d JD Observation date 15- 19 F5.2 mag Bmag Observed B magnitude 21- 24 F4.2 mag e_Bmag Mean error on Bmag
Acknowledgements: Patrick Cseresnjes History: * 25-May-2004: Original version * 01-Mar-2012: The RA column contains decimal hours (was indicated in the original description as decimal degrees) [communicated by N. Samus, Moscow] References: Cseresnjes, Paper II 2001A&A...375..909C, Cat. J/A+A/375/909
(End) Patricia Bauer [CDS] 25-May-2004
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

catalogue service

© UDS/CNRS

Contact