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J/PASP/122/1397   Spitzer Survey of Stellar Structure in Galaxies (Sheth+, 2010)

The Spitzer Survey of Stellar Structure in Galaxies (S4G). Sheth K., Regan M., Hinz J.L., De Paz A.G., Menendez-Delmestre K., Munoz-Mateos J.-C., Seibert M., Kim T., Laurikainen E., Salo H., Gadotti D.A., Laine J., Mizusawa T., Armus L., Athanassoula E., Bosma A., Buta R.J., Capak P., Jarrett T.H., Elmegreen D.M., Elmegreen B.G., Knapen J.H., Koda J., Helou G., Ho L.C., Madore B.F., Masters K.L., Mobasher B., Ogle P., Peng C.Y., Schinnerer E., Surace J.A., Zaritsky D., Comeron S., De Swardt B., Meidt S.E., Kasliwal M., Aravena M. <Publ. Astron. Soc. Pac., 122, 1397-1414 (2010)> =2010PASP..122.1397S
ADC_Keywords: Surveys ; Galaxy catalogs ; Morphology Abstract: The Spitzer Survey of Stellar Structure in Galaxies (S4G) is an Exploration Science Legacy Program approved for the Spitzer post-cryogenic mission. It is a volume-, magnitude-, and size-limited (d<40Mpc, |b|>30°, mBcorr<15.5, and D25>1') survey of 2331 galaxies using the Infrared Array Camera (IRAC) at 3.6 and 4.5um. Each galaxy is observed for 240s and mapped to ≥1.5D25. The final mosaicked images have a typical 1sigma rms noise level of 0.0072 and 0.0093MJy/sr at 3.6 and 4.5um, respectively. Our azimuthally averaged surface brightness profile typically traces isophotes at µ3.6um(AB)(1sigma)∼27mag/arcsec2, equivalent to a stellar mass surface density of ∼1M/pc2. thus provides an unprecedented data set for the study of the distribution of mass and stellar structures in the local universe. This large, unbiased, and extremely deep sample of all Hubble types from dwarfs to spirals to ellipticals will allow for detailed structural studies, not only as a function of stellar mass, but also as a function of the local environment. This article introduces the survey and describes the sample selection, the significance of the 3.6 and 4.5um bands for this study, and the data collection and survey strategies. Description: We chose all galaxies with radial velocity Vradio<3000km/s (corresponding to a distance d<40Mpc for a Hubble constant of 75km/s/Mpc), total corrected blue magnitude mBcorr<15.5, blue light isophotal angular diameter D25>1.0' at Galactic latitude |b|>30 ° using HyperLEDA (Paturel et al. 2003, Cat. VII/237, VII/238). The version 2.0 (2013-09) of the S4G contains 2352 galaxies. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 56 2331 *RC3-like parameters for galaxies s4g.dat 156 2352 S4G catalog Version 2 (2013-09)
Note on table1.dat: All properties obtained from the HyperLEDA database (
See also: : S4G at IPAC J/A+A/562/A121 : ARRAKIS: Atlas of Resonance Rings as Known In S4G (Comeron+, 2014) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Galaxy name 15- 22 F8.5 h RAhour Right ascension in decimal hours (J2000) 24- 32 F9.5 deg DEdeg Declination in decimal degrees (J2000) 34- 38 F5.1 --- TType T morphological type code (1) 40- 45 F6.2 mag BMAG ?=-99 Absolute B magnitude 47- 50 F4.2 [0.1arcmin] log(D25) Apparent major axis diameter at 25mag/arcsec2 52- 56 F5.2 mag Bmag Total apparent corrected B magnitude, corrected for inclination, Galactic extinction, and K-correction
Note (1): Morphological type code is -5=E, -3=E-S0, 0=S0a , 3=Sb, 7=Sd, and 10=Irr
Byte-by-byte Description of file: s4g.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Galaxy name 14- 22 F9.5 deg RAdeg Right ascension (J2000) 24- 32 F9.5 deg DEdeg Declination (J2000) 35- 39 F5.1 arcsec amaj ? Semi-major axis at level µ(3.6um)=25.5mag(AB)/arcsec2 41- 46 F6.1 deg PA [-160/90]? Position angle of major axis 48- 52 F5.3 --- ell [0/1]? Ellipticity (1-b/a) 54- 59 F6.3 mag [3.6] ? Spitzer/IRAC 3.6um asymptotic magnitude (AB) 62- 66 F5.3 mag e_[3.6] ? Mean error on [3.6] 68- 73 F6.3 mag [4.5] ? Spitzer/IRAC 4.5um asymptotic magnitude (AB) 76- 80 F5.3 mag e_[4.5] ? Growth-curve fitting error in [4.5] 82- 87 F6.3 --- c31 [1/]? r(75%)/r(25%) concentration index at 3.6um 89- 94 F6.3 --- c42 ? 5*log10(r(80%)/r(20%)) concentration index at 3.6um 96-102 F7.3 mag M3.6 ? Absolute magnitude at 3.6um 104-110 F7.3 mag M4.5 ? Absolute magnitude at 4.5um 113-118 F6.3 [Msun] logM* ? Stellar mass 120-126 F7.3 Mpc Dmean ? Mean redshift-independent distance 129-134 F6.3 Mpc e_Dmean ? Standard deviation of Dmean 136-139 F4.1 -- TT ? Morphological type code 141-143 F3.1 -- e_TT ? Error on TT 145-151 F7.1 km/s Vr ? Heliocentric radial velocity from radio measurement 153-156 F4.1 km/s e_Vr ? Mean error on Vr
History: * 06-May-2011: From electronic version of the journal * 23-Jul-2012: Units of RA corrected into hours (instead of degrees) * 22-Jul-2014: Added file "s4g.dat", thanks to S. Cameron
(End) Patricia Vannier [CDS] 24-Mar-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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