J/ApJS/168/277 HK-Survey field horizontal-branch candidates (Beers+, 2007)
A catalog of candidate field horizontal-branch and A-type stars. III. A 2MASS-cleaned version. Beers T.C., Almeida T., Rossi S., Wilhelm R., Marsteller B. <Astrophys. J. Suppl. Ser., 168, 277-288 (2007)> =2007ApJS..168..277B
ADC_Keywords: Stars, A-type ; Stars, horizontal branch Keywords: stars: horizontal-branch Abstract: We present coordinates and available photometric information (either from previous or recent broadband UBV observations, and near-infrared photometry from the 2MASS Point Source Catalog) for 12,056 stars (11,516 of which are unique) identified in the HK Survey of Beers and colleagues as candidate field horizontal-branch or A-type stars. These stars, in the apparent magnitude range 10≤B≤16.0, were selected using an objective-prism/interference-filter survey technique. The availability of 2MASS information permits assembly of a cleaned version of this catalog, comprising likely blue horizontal-branch (BHB) stars or blue stragglers in the color interval [-0.2≤(B-V)0≤+0.2]. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 116 12057 Catalog of HK-Survey field horizontal-branch candidates table4.dat 92 12057 2MASS identifications of HK-Survey field horizontal- branch candidates and multiple identifications
See also: J/ApJS/103/433 : Horizontal-branch and A-type star catalog. II (Beers+ 1996) J/AJ/117/2308 : Spectroscopy of hot stars in the halo (Wilhelm+, 1999) J/AJ/117/2329 : Spectroscopy of hot stars in the halo. III (Wilhelm+, 1999) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 12 A12 --- BPS Star name (BPS BS FFFFF-NNNN or BPS CS FFFFF-NNNN in Simbad) 13 A1 --- n_BPS [*] Indicates data added by the CDS team (1) 14 I1 --- BC ? Brightness classification (2) 16- 17 I2 h RAh Hour of Right Ascension (J2000) 19- 20 I2 min RAm Minute of Right Ascension (J2000) 22- 25 F4.1 s RAs Second of Right Ascension (J2000) 27 A1 --- DE- Sign of the Declination (J2000) 28- 29 I2 deg DEd Degree of Declination (J2000) 31- 32 I2 arcmin DEm Arcminute of Declination (J2000) 34- 35 I2 arcsec DEs Arcsecond of Declination (J2000) 37- 41 F5.1 deg GLON Galactic longitude 43- 47 F5.1 deg GLAT Galactic latitude 49- 53 F5.2 mag Vmag ? Measured V band magnitude 55- 59 F5.2 mag B-V ? Measured (B-V) color index 61- 65 F5.3 mag E(B-V) ? Adopted reddening estimate 67- 72 F6.3 mag Jmag ? 2MASS J band magnitude 74- 79 F6.3 mag J-H ? 2MASS (J-H) color index 81- 86 F6.3 mag V0mag ? Extinction-corrected V band magnitude 88- 93 F6.3 mag V0mag2 ? Predicted 2MASS extinction-corrected V band magnitude 95-100 F6.3 mag (B-V)0 ? Reddening-corrected (B-V) color index 102-107 F6.3 mag (B-V)02 ? Predicted 2MASS reddening-corrected (B-V) color index 109-110 A2 --- q_Class BHB probability classification (3) 112-116 A5 --- Class Wilhelm et al. (1999, Cat. J/AJ/117/2329) classification (4)
Note (1): BPS CS 30339-015 is not part of the original table, but was added by the CDS team so that tables 3 and 4 have the same number of entries. Data were taken both from 2MASS and from Simbad. Note (2): From visual inspection of the HK survey plates (1=brightest) Note (3): The BHB (Blue Horizontal Branch) likelihood is assigned in the following manner: H = (high) star has either a measured or estimated (B-V)0 color in the range -0.2≤(B-V)0≤+0.2; M = (medium) star has either a measured or estimated (B-V)0 color in the range -0.3≤(B-V)0←0.2 or +0.2<(B-V)0≤+0.4; L = (low) star has either a measured or estimated (B-V)0 color in the range lying outside of -0.3≤(B-V)0≤+0.4. Stars where there remained some difficulty in either assigning a confident 2MASS match, or where the 2MASS flags indicated possible problems with the photometry, are indicated by the ":" attached to the probability classification. Stars for which no suitable match in 2MASS could be found are assigned an "X" for their probability classifications. Note (4): Classification, defined as follows: FHB = the star has a derived temperature and gravity consistent with a horizontal-branch identification; FHB/A = it was not possible, based on the data in hand, to differentiate between a horizontal-branch and a high-gravity A-type star identification; A-V = the star is a likely high-gravity object (note that this includes some stars with temperatures cooler than would usually be considered for assignment of a type A designation); Am = the star is a likely metallic-line A-type star. The interested reader should consult Wilhelm et al. (1999, Cat. J/AJ/117/2308) for a more detailed discussion of these classes.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 12 A12 --- BPS Star name 14- 29 A16 --- 2MASS The 2MASS Identification (HHMMSSss+DDMMSSs, 2MASS JHHMMSSss+DDMMSSs in Simbad) 31- 32 I2 h RA2h ? Hour of Right Ascension (J2000) 34- 35 I2 min RA2m ? Minute of Right Ascension (J2000) 37- 41 F5.2 s RA2s ? Second of Right Ascension (J2000) 43 A1 --- DE2- Sign of the Declination (J2000) 44- 45 I2 deg DE2d ? Degree of Declination (J2000) 47- 48 I2 arcmin DE2m ? Arcminute of Declination (J2000) 50- 53 F4.1 arcsec DE2s ? Arcsecond of Declination (J2000) 55- 92 A38 --- MID Multiple HK-survey Identification(s) (1)
Note (1): Note that some of these multiply-identified stars are not present in the FHB/A candidate catalog, since they were not classified as such in the HK survey.
History: * 11-Dec-2008: From electronic version of the journal * 13-Oct-2009: BPS CS 30339-015 was the only object to be present only in table4 so the CDS team added it to table 3. References: Beers et al., Paper I 1988ApJS...67..461B Beers et al., Paper II 1996ApJS..103..433B, Cat. J/ApJS/103/433
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 11-Dec-2008
|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|