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J/AJ/131/2859     Extragalactic First Look Survey: 24µm data   (Fadda+, 2006)

The Spitzer Space Telescope extragalactic First Look Survey: 24µm data reduction, catalog, and source identification. Fadda D., Marleau F.R., Storrie-Lombardi L.J., Makovoz D., Frayer D.T., Appleton P.N., Armus L., Chapman S.C., Choi P.I., Fang F., Heinrichsen I., Helou G., Im M., Lacy M., Shupe D.L., Soifer B.T., Squires G.K., Surace J., Teplitz H.I., Wilson G., Yan L. <Astron. J., 131, 2859-2876 (2006)> =2006AJ....131.2859F
ADC_Keywords: Galaxies, IR ; Surveys ; Photometry, SDSS ; Photometry, infrared Keywords: catalogs - infrared: galaxies - surveys - techniques: photometric Abstract: We present the reduction of the 24µm data obtained during the first cosmological survey performed by the Spitzer Space Telescope. Images of a region of sky at moderately high Galactic latitude (l=88.3°, b=+34.9°) were obtained on 2003 December 9-11. The survey consists of a shallow observation of 2.5x2°2 centered at 17:18 +59:30 (main survey) and a deeper observation of 1°x0.5° centered at 17:17 +59:45 (verification survey). Issues with the reduction of the 24µm MIPS data are discussed and solutions to attenuate instrumental effects are proposed and applied to the data. Approximately 17000 sources are extracted with a signal-to-noise ratio (S/N) greater than 5. The photometry of the point sources is evaluated through point-spread function (PSF) fitting using an empirical PSF derived from the data. Aperture corrections and the absolute calibration have been checked using stars in the field. Astrometric and photometric errors depend on the S/N of the source varying between 0.35"-1" and 5%-15%, respectively, for sources detected at 20-5σ. The fluxes of the 123 extended sources have been estimated through aperture photometry. The extended sources cover less than 0.3% of the total area of the survey. Based on simulations, the main and verification surveys are 50% complete at 0.3 and 0.15mJy, respectively. Counterparts have been searched for in optical and radio catalogs. Description: The observations of the FLS field were carried out using 12 AORs (astronomical observation requests) in 3 days of the first MIPS scientific campaign (2003 December 9-11) in nominal operations. The main field (2.5x2°2) was surveyed with eight AORs to obtain an average effective integration time of 84s per sky pixel. Four AORs were used to survey the verification region (1x0.5°2) obtaining an effective integration time of 426s per sky pixel. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 78 124 Extended sources table4.dat 187 231 Stars used for absolute calibration table5.dat 132 16905 The 24µm point source catalog
See also: J/A+A/424/371 : 1.4GHz First Look Survey (FLS) (Morganti+, 2004) J/AJ/131/250 : Spitzer 70 and 160um observations in xFLS (Frayer+, 2006) J/MNRAS/376/1251 : 610MHz observations of Spitzer XFLS (Garn+, 2007) J/AJ/125/2411 : SIRTF First-Look Survey (Condon+, 2003) J/AJ/128/1 : First Look Survey: NOAO R-band Mosaic (Fadda+, 2004) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 16 A16 --- SSTXFLS24 The IAU designation (JHHMMSS.s+DDMMSS) 18- 19 I2 h RAh Hour of Right Ascension (J2000) 21- 22 I2 min RAm Minute of Right Ascension (J2000) 24- 29 F6.3 s RAs Second of Right Ascension (J2000) 31 A1 --- DE- Sign of the Declination (J2000) 32- 33 I2 deg DEd Degree of Declination (J2000) 35- 36 I2 arcmin DEm Arcminute of Declination (J2000) 38- 42 F5.2 arcsec DEs Arcsecond of Declination (J2000) 44- 50 F7.3 mJy F24um The 24µm flux 52- 56 F5.3 mJy F20cm ? The 20cm flux 58 A1 --- f_F20cm [O] Indicates a flux "out of image" 60- 64 F5.2 mag Rmag The R band magnitude 66- 71 F6.4 --- z ? Redshift 73- 78 A6 --- Note Object note
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Hour of Right Ascension (J2000) 4- 5 I2 min RAm Minute of Right Ascension (J2000) 7- 12 F6.3 s RAs Second of Right Ascension (J2000) 14 A1 --- DE- Sign of the Declination (J2000) 15- 16 I2 deg DEd Degree of Declination (J2000) 18- 19 I2 arcmin DEm Arcminute of Declination (J2000) 21- 25 F5.2 arcsec DEs Arcsecond of Declination (J2000) 27- 31 F5.2 mag u'mag SDSS u' band magnitude 33- 36 F4.2 mag e_u'mag Error in umag 38- 42 F5.2 mag g'mag SDSS g' band magnitude 43 A1 --- f_g'mag [*] Indicates a deviant point in the fit 45- 48 F4.2 mag e_g'mag Error in gmag 50- 54 F5.2 mag r'mag SDSS r' band magnitude 55 A1 --- f_r'mag [*] Indicates a deviant point in the fit 57- 60 F4.2 mag e_r'mag Error in rmag 62- 66 F5.2 mag i'mag SDSS i' band magnitude 67 A1 --- f_i'mag [*] Indicates a deviant point in the fit 69- 72 F4.2 mag e_i'mag Error in imag 74- 78 F5.2 mag z'mag SDSS z' band magnitude 79 A1 --- f_z'mag [*] Indicates a deviant point in the fit 81- 84 F4.2 mag e_z'mag Error in zmag 86- 90 F5.2 mag Jmag 2MASS J band magnitude 92- 95 F4.2 mag e_Jmag Error in Jmag 97-101 F5.2 mag Hmag 2MASS H band magnitude 103-106 F4.2 mag e_Hmag Error in Hmag 108-112 F5.2 mag Ksmag 2MASS Ks band magnitude 114-117 F4.2 mag e_Ksmag Error in Kmag 119-123 F5.1 mJy F3.5um IRAC 3.5µm flux 125-128 F4.1 mJy e_F3.5um Error in 3.5F 130-134 F5.1 mJy F4.5um IRAC 4.5µm flux 136-139 F4.1 mJy e_F4.5um Error in 4.5F 141-145 F5.1 mJy F5.8um IRAC 5.8µm flux 147-150 F4.1 mJy e_F5.8um Error in 5.8F 152-156 F5.2 mJy F24umM Measured 24µm flux 158-161 F4.2 mJy e_F24umM Error in M-24F 163-167 F5.2 mJy F24umP Predicted 24µm flux 169-171 F3.1 mJy e_F24umP Error in P-24F 173-176 I4 K Teff Best fit effective temperature 178-181 F4.2 [Sun] [Fe/H] Log of the best fit Fe/H number abundance (1) 183-187 F5.2 [cm/s2] log(g) Log of the best fit surface gravity
Note (1): Relative to solar.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 16 A16 --- SSTXFLS24 The IAU designation (JHHMMSS.s+DDMMSS) 18- 19 I2 h RAh Hour of Right Ascension (J2000) 20- 21 I2 min RAm Minute of Right Ascension (J2000) 22- 27 F6.3 s RAs Second of Right Ascension (J2000) 28 A1 --- DE- Sign of the Declination (J2000) 29- 30 I2 deg DEd Degree of Declination (J2000) 31- 32 I2 arcmin DEm Arcminute of Declination (J2000) 33- 37 F5.2 arcsec DEs Arcsecond of Declination (J2000) 39- 41 F3.1 arcsec e_pos Position error 43- 47 F5.2 mJy F24um The 24µm flux 49- 52 F4.2 mJy e_F24um Error in 24F 54- 58 F5.1 --- S/N Signal-to-noise ratio of the detection 60- 61 I2 h RAOh ? Hour of Right Ascension of the optical counterpart (J2000) 62- 63 I2 min RAOm ? Minute of Right Ascension of the optical counterpart (J2000) 64- 69 F6.3 s RAOs ? Second of Right Ascension of the optical counterpart (J2000) 70 A1 --- DEO- Sign of the Declination of the optical counterpart (J2000) 71- 72 I2 deg DEOd ? Degree of Declination of the optical counterpart (J2000) 73- 74 I2 arcmin DEOm ? Arcminute of Declination of the optical counterpart (J2000) 75- 79 F5.2 arcsec DEOs ? Arcsecond of Declination of the optical counterpart (J2000) 81- 85 F5.2 mag Rmag ? Optical counterpart R band magnitude 87- 89 F3.1 arcsec rIO ? IR source and optical counterpart distance 91 I1 --- No Number of possible optical counterparts within 5 arcsec 93- 96 F4.2 --- Rel ? Reliability of the most likely optical counterpart 98 I1 --- OInd [0/1] Optical index of coverage (1) 100-101 I2 h RARh ? Hour of Right Ascension of the radio counterpart (J2000) 102-103 I2 min RARm ? Minute of Right Ascension of the radio counterpart (J2000) 104-109 F6.3 s RARs ? Second of Right Ascension of the radio counterpart (J2000) 110 A1 --- DER- Sign of the Declination of the radio counterpart (J2000) 111-112 I2 deg DERd ? Degree of Declination of the radio counterpart (J2000) 113-114 I2 arcmin DERm ? Arcminute of Declination of the radio counterpart (J2000) 115-119 F5.2 arcsec DERs ? Arcsecond of Declination of the radio counterpart (J2000) 121-126 F6.2 mJy F20cm ? Radio counterpart 20cm flux 128-130 F3.1 arcsec rIR ? IR source and radio counterpart distance 132 I1 --- RInd [0/1] Radio index of coverage (1)
Note (1): Radio index of coverage, defined as follows: 1 = out of KPNO or VLA field; 0 = inside the KPNO or VLA field.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 17-Jun-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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