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J/AJ/134/2474  Hα emission-line stars in 7 dwarfs galaxies (Massey+, 2007)

A survey of local group galaxies currently forming stars. III. A search for luminous blue variables and other Hα emission-line stars. Massey P., Mcneill R.T., Olsen K.A.G., Hodge P.W., Blaha C., Jacoby G.H., Smith R.C., Strong S.B. <Astron. J., 134, 2474-2503 (2007)> =2007AJ....134.2474M
ADC_Keywords: Galaxies, nearby ; Stars, emission ; Photometry, H-alpha Keywords: catalogs - galaxies: stellar content - stars: early-type - supergiants - surveys Abstract: We describe a search for Hα emission-line stars in M31, M33, and seven dwarfs in or near the Local Group (IC 10, NGC 6822, WLM, Sextans B, Sextans A, Pegasus, and the Phoenix dwarf) using interference filter imaging with the KPNO and CTIO 4m telescopes and Mosaic cameras. The survey is aimed primarily at identifying new luminous blue variables (LBVs) from their spectroscopic similarity to known LBVs, avoiding the bias toward photometric variability, which may require centuries to manifest itself if LBVs go through long quiescent periods. Follow-up spectroscopy with WIYN confirms that our survey detected a wealth of stars whose spectra are similar to the known LBVs. Description: The narrowband observations were made with the Mosaic cameras mounted at the prime foci of the KPNO and CTIO 4m telescopes. The instruments and basic reduction procedures are given in detail in Paper I (Cat. J/AJ/131/2478). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tables.dat 139 7158 Hα emission-line stars in 8 galaxies (tables 8-15 of the paper) table17.dat 68 126 New spectroscopic identifications
See also: J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006) J/AJ/133/2393 : UBVRI phot. in 7 Local Group dwarf galaxies (Massey+, 2007) Byte-by-byte Description of file: tables.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Gal Galaxy name 11- 29 A19 -- LGGS LGGS Designation ( 31- 32 I2 h RAh Hour of Right ascension (J2000) 34- 35 I2 min RAm Minute of Right ascension (J2000) 37- 41 F5.2 s RAs Second of Right ascension (J2000) 43 A1 -- DE- Sign of the Declination (J2000) 44- 45 I2 deg DEd Degree of Declination (J2000) 47- 48 I2 arcmin DEm Arcminute of Declination (J2000) 50- 53 F4.1 arcsec DEs Arcsecond of Declination (J2000) 55- 59 F5.2 mag HAmag The Hα band magnitude 61- 65 F5.2 mag HA-S2 The (Hα-[SII]) color index 67- 71 F5.2 mag O3-c The ([OIII]-continuum) color index 73- 77 F5.2 mag Vmag The V band magnitude 79- 83 F5.2 mag B-V The (B-V) color index 85- 89 F5.2 mag U-B ?=99.99 The (U-B) color index 91- 95 F5.2 mag Qmag ?=99.99 reddening-free index Q = U-B -0.72(B-V) 97-116 A20 -- SpType Spectral class (if available) 118-133 A16 -- CrossID Cross identification (if available) 135-139 A5 -- Ref References for spectral type (1)
Note (1): References as follows: 1 = Paper I, Massey et al. 2006, Cat. J/AJ/131/2478 2 = This paper 3 = Massey et al. (1996, Cat. J/ApJ/649/629) 4 = Massey et al. (1995, Cat. J/AJ/110/2715) 5 = Monteverde et al. (1996A&A...312...24M) 6 = Hubble & Sandage (1953ApJ...118..353H) 7 = Massey & Johnson (1998, Cat. J/ApJ/505/793) and references therein 8 = Corral (1996AJ....112.1450C) 9 = Viotti et al. (2007A&A...464L..53V) and references therein 10 = Bianchi et al. (1994A&A...292..213B) 11 = Crowther et al (2003A&A...404..483C) 12 = Massey & Armandroff (1995AJ....109.2470M) 13 = Westerlund et al (1983A&A...123..159W) 14 = Bresolin et al. (2006ApJ...648.1007B)
Byte-by-byte Description of file: table17.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Gal Galaxy name 11- 29 A19 -- LGGS LGGS Designation 31- 60 A30 --- SpType Spectral classification 61 A1 --- Note Note (1) 63- 68 A6 --- Fig Figure number(s)
Note (1): Notes as follows: a = In a few cases where our fiber spectroscopy revealed only the spectra of an H II region, previous long-slit spectra had permitted a spectral type to be determined for the underlying star. We include these here and retain the originals in Tables 8-11. b = Previous spectral type is shown, but we adopt the new one (given first) here. c = Previously called WN by Massey & Conti (1983ApJ...273..576M); see text. d = Previously called B0.5 Ia+WNE by Massey et al. (1996, Cat. J/ApJ/469/629); see text. e = Previously called B1 Ia (101-A) by Monteverde et al. (1996A&A...312...24M); see text.
History: From electronic version of the journal References: Massey et al., Paper I 2006AJ....131.2478M, Cat. J/AJ/131/2478 Massey et al., Paper II 2007AJ....133.2393M, Cat. J/AJ/133/2393
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Feb-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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