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J/A+A/476/1161      Spitzer photometry of M33                (Verley+, 2007)

Star formation in M33: Spitzer photometry of discrete sources. Verley S., Hunt L.K., Corbelli E., Giovanardi C. <Astron. Astrophys., 476, 1161-1178 (2007)> =2007A&A...476.1161V
ADC_Keywords: Galaxies, nearby ; Photometry, infrared Keywords: galaxies: individual: M 33 - galaxies: ISM - galaxies: Local Group - galaxies: spiral Abstract: Combining the relative vicinity of the Local Group spiral galaxy M33 with the Spitzer images, we investigate the properties of infrared (IR) emission sites and assess the reliability of the IR emission as a star formation tracer. The mid- and far-IR emission of M33 was obtained from IRAC and MIPS images from the Spitzer archive. We compared the photometric results for several samples of three known types of discrete sources (HII regions, supernovae remnants and planetary nebulae) with theoretical diagnostic diagrams, and derived the spectral energy distribution (from 3.6 to 24µm) of each type of object. Moreover, we generated a catalogue of 24µm sources and inferred their nature from the observed and theoretical colours of the known type sources. We estimated the star formation rate in M33 both globally and locally, from the IR emission and from the Halpha emission line. Description: We retrieved images from the Guaranteed Time Observations (PID 5, PI R. Gehrz) in the Spitzer Space Telescope data archive. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 111 75 Photometry of known type sources table3.dat 118 515 Photometry of 24µm sources
See also: J/AJ/110/2739 : H-alpha emitting regions in M33 (Calzetti+ 1995) J/A+A/426/11 : XMM-Newton survey of M33 (Pietsch+, 2004) J/A+A/448/1247 : XMM-Newton survey of M33 (Misanovic+, 2006) J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006) J/A+A/472/785 : Radio continuum survey of M33 (Tabatabaei+, 2007) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 7 A7 --- [VHC2007b] Source name 9- 10 I2 h RAh Right ascension (J2000) 12- 13 I2 min RAm Right ascension (J2000) 15- 19 F5.2 s RAs Right ascension (J2000) 21 A1 --- DE- Declination sign (J2000) 22- 23 I2 deg DEd Declination (J2000) 25- 26 I2 arcmin DEm Declination (J2000) 28- 32 F5.2 arcsec DEs Declination (J2000) 34- 39 F6.3 mJy F3.5um Flux density at 3.6um 41- 44 F4.2 mJy e_F3.5um rms uncertainty on F3.5um 46- 51 F6.3 mJy F4.5um Flux density at 4.5um 53- 56 F4.2 mJy e_F4.5um rms uncertainty on F4.5um 58- 64 F7.3 mJy F5.8um Flux density at 5.8um 66- 69 F4.2 mJy e_F5.8um rms uncertainty on F5.8um 71- 77 F7.3 mJy F8.0um Flux density at 8.0um 79- 82 F4.2 mJy e_F8.0um rms uncertainty on F8.0um 84- 91 F8.3 mJy F24um ?=-99.999 Flux density at 24um (1) 93- 97 F5.2 mJy e_F24um ?=-9.99 rms uncertainty on F24um 99-105 F7.3 10-17W/m2 FHa ?=-99.999 Halpha flux density (1) 107-111 F5.2 10-17W/m2 e_FHa ?=-9.99 rms uncertainty on FHa
Note (1): The flag -99.999 is used when the photometric centre is farther than 3.6" from the nominal position.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number, [VHC2007b] IR NNN in Simbad 5- 14 F10.7 deg RAdeg Right ascension in decimal degrees (J2000) 16- 25 F10.7 deg DEdeg Declination in decimal degrees (J2000) 27- 33 F7.3 mJy F3.5um ?=-9.999 Flux density at 3.6um (1) 35- 40 F6.3 mJy e_F3.5um ?=-9.999 rms uncertainty on F3.5um 42- 48 F7.3 mJy F4.5um ?=-9.999 Flux density at 4.5um (1) 50- 55 F6.3 mJy e_F4.5um ?=-9.999 rms uncertainty on F4.5um 57- 63 F7.3 mJy F5.8um ?=-9.999 Flux density at 5.8um (1) 66- 71 F6.3 mJy e_F5.8um ?=-9.999 rms uncertainty on F5.8um 73- 79 F7.3 mJy F8.0um ?=-9.999 Flux density at 8.0um (1) 82- 87 F6.3 mJy e_F8.0um ?=-9.999 rms uncertainty on F8.0um 89- 96 F8.3 mJy F24um ?=-9.999 Flux density at 24um (1) 98-103 F6.3 mJy e_F24um ?=-9.999 rms uncertainty on F24um 105-111 F7.3 10-17W/m2 FHa ?=-9.999 Halpha flux density (1) 113-118 F6.3 10-17W/m2 e_FHa ?=-9.999 rms uncertainty on FHa
Note (1): The flag -9.999 is used when the photometric centre is farther than 3.6" from the nominal position.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 25-Jan-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

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