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J/AJ/124/1651  Faint high-latitude carbon stars SDSS photometry  (Margon+, 2002)

Faint high-latitude carbon stars discovered by the Sloan Digital Sky Survey: methods and initial results. Margon B., Anderson S.F., Harris H.C., Strauss M.A., Knapp G.R., Fan X., Schneider D.P., Vanden Berk D.E., Schlegel D.J., Deutsch E.W., Ivezic Z., Hall P.B., Williams B.F., Davidsen A.F., Brinkmann J., Csabai I., Hayes J.J.E., Hennessy G., Kinney E.K., Kleinman S.J., Lamb D.Q., Long D., Neilsen E.H., Nichol R., Nitta A., Snedden S.A., York D.G. <Astron. J. 124, 1651 (2002)> =2002AJ....124.1651M
ADC_Keywords: Stars, carbon ; Stars, faint ; Photometry, SDSS ; Photometry, infrared Keywords: astrometry - stars: carbon - stars: statistics - surveys Abstract: We report the discovery of 39 faint high-latitude carbon stars (FHLCs) from Sloan Digital Sky Survey (SDSS) commissioning data. The objects, each selected photometrically and verified spectroscopically, range over 16.6<r*<20.0 and show a diversity of temperatures as judged by both colors and NaD line strengths. Although a handful of these stars were previously known, these objects are, in general, too faint and too warm to be effectively identified in other modern surveys such as the Two Micron All Sky Survey, nor are their red/near-IR colors particularly distinctive. We present proper-motion measures for each object, indicating that the sample is a mixture of extremely distant (greater than 100kpc) halo giant stars, useful for constraining halo dynamics, and members of the recently recognized exotic class of very nearby dwarf carbon (dC) stars. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 68 39 Faint high-latitude carbon stars discovered in SDSS commissioning data table2.dat 74 17 SDSS faint high-latitude carbon stars in released 2MASS fields
See also: II/246 : The 2MASS database (IPAC/UMass, 2000) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 16 A16 --- SDSS SDSS designation 18- 22 F5.2 mag r*mag SDSS r* magnitude 24- 27 F4.2 mag u*-g* SDSS u*-g* colour index 29- 32 F4.2 mag g*-r* SDSS g*-r* colour index 34- 37 F4.2 mag r*-i* SDSS r*-i* colour index 39- 43 F5.2 mag i*-z* SDSS i*-z* colour index 45- 47 I3 mas/yr pm ? Proper motion 49- 50 I2 mas/yr e_pm ? rms uncertainty on pm 52- 54 I3 deg PA ? Position angle 56- 61 F6.1 km/s HRV ? Heliocentric radial velocity 63- 66 F4.1 km/s e_HRV ? rms uncertainty on HRV 68 A1 --- n_SDSS [b-d] Individual notes (1)
Note (1): Notes are coded as follows: b: Two separate observations exist; the weighted average RV is quoted c: ARC 3.5m spectrum only; no RV data is available d: The object is very faint; there is no suitable first-epoch data for quantitative proper-motion analysis, although informal indications are that any motion must be small
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 16 A16 --- SDSS SDSS designation 17 A1 --- n_SDSS [c] Note on SDSS (2) 19- 33 A15 --- 2MASS 2MASS designation (1) 34 A1 --- n_2MASS [b] Note on 2MASS (2) 36- 40 F5.2 mag z*mag SDSS z* magnitude 42- 46 F5.2 mag Jmag ? 2MASS J Magnitude 48- 51 F4.2 mag e_Jmag ? rms uncertainty on Jmag 53- 57 F5.2 mag Hmag ? 2MASS H magnitude 59- 62 F4.2 mag e_Hmag ? rms uncertainty on Hmag 64 A1 --- l_Kmag Limit flag on Kmag 65- 69 F5.2 mag Kmag ? 2MASS K magnitude 71- 74 F4.2 mag e_Kmag ? rms uncertainty on Kmag
Note (1): Blank entry indicates object lies within 2MASS survey area, but was not detected by 2MASS. Note (2): Individual notes: b: Faintly visible on sky GIF images, but not catalogued by 2MASS. c: Not part of autonomously selected sample, but included here for completeness; see Sect. 2.2.2 of the paper.
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 08-Nov-2002
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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