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J/ApJ/687/230            Survey of M31 with Spitzer               (Mould+, 2008)

A point-source survey of M31 with the Spitzer Space Telescope. Mould J., Barmby P., Gordon K., Willner S.P., Ashby M.L.N., Gehrz R.D., Humphreys R., Woodward C.E. <Astrophys. J., 687, 230-241 (2008)> =2008ApJ...687..230M
ADC_Keywords: Photometry, infrared ; Stars, supergiant ; Stars, giant ; YSOs ; Galaxies, IR Keywords: galaxies: individual (M31) - galaxies: stellar content Abstract: We explore the stellar population of M31 in a Spitzer Space Telescope survey utilizing IRAC and MIPS observations. Red supergiants are the brightest objects seen in the infrared; they are a prominent evolutionary phase. Due to their circumstellar envelopes, many of these radiate the bulk of their luminosity at IRAC wavelengths and do not stand out in the near-infrared or optically. Going fainter, we see large numbers of luminous asymptotic giant branch stars (AGB), many of which are known long-period variables. Relative to M33 the AGB carbon star population of M31 appears sparse, but this needs to be spectroscopically confirmed. Description: The IRAC data and reduction are described in Barmby et al. (2006ApJ...650L..45B); observations of M31 were taken as part of Spitzer General Observer program 3126 in 2005 January and August. The MIPS resolution ranges from 6" at 24um to 40" at 160um. Gordon et al. (2006ApJ...638L..87G) described the MIPS program surveying M31 (images were taken on 2004 August 25). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 81 426 Photometry of the infrared brightest stars table2.dat 64 106 2MASS 6X matches table3.dat 47 831 Long period variables (LPV) matches table4.dat 67 599 MIPS 24 micron sources
See also: J/AJ/132/271 : SFR of M31 from resolved stars in near-IR (Olsen+, 2006) J/ApJS/154/623 : M31 Long Period Variables : Photometry (Mould+, 2004) J/ApJS/118/177 : JHK photometry of M31 spiral arm (Kodaira+, 1998) J/AJ/96/1884 : BVRJHK photometry of M31 red supergiants (Humphreys+ 1988) http://irsa.ipac.caltech.edu/applications/Gator : NASA/IPAC catalogs online (including 2MASS 6X) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 19 A19 --- IRAC Identification (JHHMMSS.ss+DDMMSS.s) 21- 28 F8.5 deg RAdeg Right Ascension in decimal degrees (J2000) 30- 37 F8.5 deg DEdeg Declination in decimal degrees (J2000) 39- 43 F5.2 mag 3.6mag Spitzer/IRAC 3.6 micron band magnitude 45- 48 F4.2 mag e_3.6mag Error in 3.6mag 50- 54 F5.2 mag 4.5mag ? Spitzer/IRAC 4.5 micron band magnitude 56- 59 F4.2 mag e_4.5mag ? Error in 4.5mag 61- 65 F5.2 mag 5.8mag ? Spitzer/IRAC 5.8 micron band magnitude 67- 70 F4.2 mag e_5.8mag ? Error in 5.8mag 72- 76 F5.2 mag 8.0mag Spitzer/IRAC 8.0 micron band magnitude 78- 81 F4.2 mag e_8.0mag Error in 8.0mag
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 I4 --- 2MASS 2MASS 6X identification number 6- 13 F8.5 deg RAdeg Right Ascension in decimal degrees (J2000) 15- 22 F8.5 deg DEdeg Declination in decimal degrees (J2000) 24- 28 F5.2 mag Jmag 2MASS J band magnitude 30- 34 F5.2 mag Hmag 2MASS H band magnitude 36- 40 F5.2 mag Ksmag 2MASS Ks band magnitude 42- 46 F5.2 mag 3.6mag Spitzer/IRAC 3.6 micron band magnitude 48- 52 F5.2 mag 4.5mag ? Spitzer/IRAC 4.5 micron band magnitude 54- 58 F5.2 mag 5.8mag ? Spitzer/IRAC 5.8 micron band magnitude 60- 64 F5.2 mag 8.0mag Spitzer/IRAC 8.0 micron band magnitude
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 5 I5 --- [MSH2004] Mould, Saha, & Hughes 2004, Cat. J/ApJS/154/623 identification number 7- 11 F5.2 mag Jmag ? The J Johnson band magnitude 13- 17 F5.2 mag Hmag ? The H Johnson band magnitude 19- 23 F5.2 mag Kmag ? The K Johnson band magnitude 25- 29 F5.2 mag 3.6mag Spitzer/IRAC 3.6 micron band magnitude 31- 35 F5.2 mag 4.5mag ? Spitzer/IRAC 4.5 micron band magnitude 37- 41 F5.2 mag 5.8mag ? Spitzer/IRAC 5.8 micron band magnitude 43- 47 F5.2 mag 8.0mag ? Spitzer/IRAC 8.0 micron band magnitude
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 19 A19 --- SST The SSTM1M311 identification (JHHMMSS.ss+DDMMSS.s) 21- 28 F8.5 deg RAdeg Right Ascension in decimal degrees (J2000) 30- 37 F8.5 deg DEdeg Declination in decimal degrees (J2000) 39- 43 F5.2 mag 3.6mag Spitzer/IRAC 3.6 micron band magnitude 45- 49 F5.2 mag 4.5mag ? Spitzer/IRAC 4.5 micron band magnitude 51- 55 F5.2 mag 5.8mag ? Spitzer/IRAC 5.8 micron band magnitude 57- 61 F5.2 mag 8.0mag Spitzer/IRAC 8.0 micron band magnitude 63- 67 F5.2 mag 24mag Spitzer/MIPS 24 micron band magnitude
Nomenclature notes: Objects in Simbad are, for Table 1: <[MBG2008] IRAC JHHMMSS.ss+DDMMSS.s>, for Table 2: <[MBG2008] 2MASS 6X NNNN>, for Table 3: <[MSH2004] FFNNN> and for Table 4: <[MBG2008] SSTM1M311 JHHMMSS.ss+DDMMSS.s>. History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Jan-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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