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J/ApJ/697/1993          Spitzer study of AGB stars. III.          (Boyer+, 2009)

A Spitzer study of asymptotic giant branch stars. III. Dust production and gas return in Local Group dwarf irregular galaxies. Boyer M.L., Skillman E.D., van Loon J.T., Gehrz R.D., Woodward C.E. <Astrophys. J., 697, 1993-2014 (2009)> =2009ApJ...697.1993B
ADC_Keywords: Galaxies, nearby ; Stars, giant ; Photometry, infrared Keywords: galaxies: dwarf - galaxies: irregular - stars: AGB and post-AGB - stars: carbon - stars: mass loss Abstract: We present the third and final part of a census of asymptotic giant branch (AGB) stars in Local Group dwarf irregular (dIrr) galaxies. Papers I (Jackson et al. 2007ApJ...656..818J) and II (Jackson et al. 2007ApJ...667..891J) presented the results for WLM and IC 1613. Included here are Phoenix, LGS 3, DDO 210, Leo A, Pegasus dIrr, and Sextans A. Spitzer photometry at 3.6, 4.5, 5.8, and 8um are presented, along with a more thorough treatment of background galaxy contamination than was presented in Papers I and II. We find that at least a small population of completely optically obscured AGB stars exists in each galaxy, regardless of the galaxy's metallicity, but that higher metallicity galaxies tend to harbor more stars with slight infrared excesses. Description: Table 2 summaries the observations obtained with IRAC from 2003-12-06 to 2007-08-16, for Phoenix, LGS 3, DDO 210, Leo A, Pegasus dIrr, and Sextans A. For WLM (Paper I) and IC 1613 (Paper II), Spitzer/IRAC data were obtained in two separate AORs on 2003 December UT and 2005 December 23 UT (AORKEYs: r5051136 and r15892480, respectively). Both AORs of WLM were done as part of a larger guaranteed time observing program (PID: 128, PI: R. D. Gehrz). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 74 16 Observation details table3.dat 72 21922 Sample table: IRAC point-source magnitudes
See also: J/A+A/493/1075 : JKs photometry of C stars in 2 nearby galaxies (Battinelli+ 2009) J/MNRAS/385/1045 : JHKsIc photometry of AGB in Phoenix dwarf gal. (Menzies+, 2008) J/A+A/466/501 : JKs photometry of WLM galaxy carbon stars (Valcheva+, 2007) J/AJ/127/2723 : Abundances of 3 supergiants in Sextans A (Kaufer+, 2004) J/AJ/119/2780 : C stars in IC 1613 (Albert+, 2000) J/AJ/120/1801 : C stars in Pegasus, DDO 210 and Tucana (Battinelli+, 2000) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Gal Galaxy identification 13- 20 I8 --- AOR AOR Key 22- 23 I2 h RAh Hour of right ascension (J2000) 25- 26 I2 min RAm Minute of right ascension (J2000) 28- 32 F5.2 s RAs Second of right ascension (J2000) 34 A1 --- DE- Sign of declination (J2000) 35- 36 I2 deg DEd Degree of declination (J2000) 38- 39 I2 arcmin DEm Arcminute of declination (J2000) 41- 44 F4.1 arcsec DEs Arcsecond of declination (J2000) 46- 50 I5 --- PID Program identification 52- 61 A10 "YYYY/MM/DD" Date Date of observation (UT) 63- 65 F3.1 um lam1 ? Wavelength minimum range 67- 69 F3.1 um lam2 ? Wavelength maximum range 71- 73 I3 s Depth ? Exposure depth 74 I1 --- Ref [1/2]? Observation reference (1)
Note (1): Data for WLM and IC 1613 added by CDS with references as follows: 1 = Data from Paper I: Jackson et al., 2007ApJ...656..818J 2 = Data from Paper II: Jackson et al., 2007ApJ...667..891J
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Gal Galaxy identification 13- 16 A4 --- --- [SSTU] 18- 36 A19 --- SSTU Source identification (JHHMMSS.ss+DDMMSS.s) (1) 38- 41 F4.1 mag 3.6mag ? Spitzer/IRAC apparent 3.6 micron band magnitude 43- 45 F3.1 mag e_3.6mag ? Uncertainty in 3.6mag 47- 50 F4.1 mag 4.5mag ? Spitzer/IRAC apparent 4.5 micron band magnitude 52- 54 F3.1 mag e_4.5mag ? Uncertainty in 4.5mag 56- 59 F4.1 mag 5.8mag ? Spitzer/IRAC apparent 5.8 micron band magnitude 61- 63 F3.1 mag e_5.8mag ? Uncertainty in 5.8 65- 68 F4.1 mag 8.0mag ? Spitzer/IRAC apparent 8.0 micron band magnitude 70- 72 F3.1 mag e_8.0mag ? Uncertainty in 8.0mag
Note (1): The source ID follows the standard Spitzer naming convention, giving the truncated (J2000) coordinates.
History: From electronic version of the journal References: Jackson et al. Paper I. 2007ApJ...656..818J Jackson et al. Paper II. 2007ApJ...667..891J
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 31-May-2011
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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