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J/AJ/127/899        Blue HB stars in SDSS                    (Sirko+, 2004)

Blue horizontal-branch stars in the Sloan Digital Sky Survey. I. Sample selection and structure in the galactic halo. Sirko E., Goodman J., Knapp G.R., Brinkmann J., Ivezic Z., Knerr E.J., Schlegel D., Schneider D.P., York D.G. <Astron. J., 127, 899-913 (2004)> =2004AJ....127..899S
ADC_Keywords: Stars, blue ; Stars, horizontal branch ; Photometry, SDSS Keywords: Galaxy: halo - Galaxy: structure - stars: horizontal-branch Abstract: We isolate samples of 733 bright (g<18) and 437 faint (g>18) high Galactic latitude blue horizontal-branch stars with photometry and spectroscopy in the Sloan Digital Sky Survey (SDSS). Comparison of independent photometric and spectroscopic selection criteria indicates that contamination from F and blue straggler stars is less than 10% for bright stars (g<18) and about 25% for faint stars (g>18), and this is qualitatively confirmed by proper motions based on the USNO-A (I/252) catalog as first epoch. Analysis of repeated observations shows that the errors in radial velocity are ∼26km/s. A relation between absolute magnitude and color is established using the horizontal branches of halo globular clusters observed by SDSS. Bolometric corrections and colors are synthesized in the SDSS filters from model spectra. The redder stars agree well in absolute magnitude with accepted values for RR Lyrae stars. The resulting photometric distances are accurate to about 0.2mag, with a median of about 25kpc. Modest clumps in phase space exist and are consistent with the previously reported tidal stream of the Sagittarius dwarf galaxy. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 194 1170 List of 1170 BHB Stars Selected from SDSS
See also: I/252 : The USNO-A2.0 Catalogue (Monet+ 1998) J/AJ/123/567 : SDSS quasar catalog, I: Early Data Release (Schneider+, 2002) J/AJ/126/2579 : SDSS quasar catalog. II. First data release (Schneider+, 2003) J/AJ/125/1817 : SDSS Early-Type Galaxies Catalog (Bernardi+, 2003) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 9 F9.5 deg RAdeg Right ascension in decimal degrees (J2000) 11- 19 F9.5 deg DEdeg Declination in decimal degrees (J2000) 21- 29 F9.5 deg GLON Galactic longitude 31- 39 F9.5 deg GLAT Galactic latitude 41- 45 F5.2 mag umag Uncorrected SDSS u-band magnitude 47- 51 F5.2 mag gmag Uncorrected SDSS g-band magnitude 53- 57 F5.2 mag rmag Uncorrected SDSS r-band magnitude 59- 63 F5.2 mag imag Uncorrected SDSS i-band magnitude 65- 69 F5.2 mag zmag Uncorrected SDSS z-band magnitude 71- 75 F5.2 mag ucormag Extinction corrected SDSS u-band magnitude 77- 81 F5.2 mag gcormag Extinction corrected SDSS g-band magnitude 83- 87 F5.2 mag rcormag Extinction corrected SDSS r-band magnitude 89- 93 F5.2 mag icormag Extinction corrected SDSS i-band magnitude 95- 99 F5.2 mag zcormag Extinction corrected SDSS z-band magnitude 101-110 F10.7 --- z Heliocentric redshift 112-118 F7.2 km/s Vgal Galactocentric velocity (1) 120-125 F6.2 kpc Dist Distance (2) 127-133 F7.4 0.1nm D0.2-Hg Hγ width at 80% of continuum 135-140 F6.4 --- fm-Hg Hγ flux relative to the continuum at the line minimum 142-148 F7.4 0.1nm D0.2-Hd Hδ width at 80% of continuum 150-155 F6.4 --- fm-Hd Hδ flux relative to the continuum at the line minimum 157-162 F6.4 --- fm-CaII Ca II flux relative to the continuum at the line minimum 164-170 F7.4 --- b-Hg Hγ Sersic profile "b" parameter 172-178 F7.4 --- c-Hg Hγ Sersic profile "c" parameter 180-186 F7.4 --- b-Hd Hδ Sersic profile "b" parameter 188-193 F6.4 --- c-Hd Hδ Sersic profile "c" parameter
Note (1): Assuming V=(10,225,7)km/s. Note (2): As determined by the method of section 7.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 02-Jul-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

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