J/ApJ/701/1123 MIR spectroscopic catalog of 150 galaxies (Dasyra+, 2009)
The ∼0.9 mJy sample: a mid-infrared spectroscopic catalog of 150 infrared-luminous, 24 µm selected galaxies at 0.3 ≤ z ≤ 3.5. Dasyra K.M., Yan L., Helou G., Sajina A., Fadda D., Zamojski M., Armus L., Draine B., Frayer D. <Astrophys. J., 701, 1123-1146 (2009)> =2009ApJ...701.1123D
ADC_Keywords: Galaxies, IR ; Active gal. nuclei ; Spectra, infrared ; Redshifts ; Equivalent widths Keywords: dust, extinction - galaxies: active - galaxies: evolution - galaxies: formation - galaxies: high-redshift - galaxies: interactions - galaxies: starburst - infrared: galaxies Abstract: We present a catalog of mid-infrared (MIR) spectra of 150 infrared (IR) luminous galaxies in the Spitzer extragalactic first look survey obtained with the IR spectrograph on board the Spitzer Space Telescope. The sample is selected to be brighter than ∼0.9mJy at 24um and it has a redshift distribution in the range [0.3, 3.5], with a peak at z=1. It primarily comprises ultraluminous IR galaxies (ULIRGs) at z≳1 and luminous IR galaxies at z<1, as estimated from their monochromatic rest-frame 14um luminosities. The number of sources with spectra that are dominated by an active galactic nucleus (AGN) continuum is 49, while 39 sources have strong, star formation related features. Description: The sample comprises 150 sources that were selected from the 24um mosaic of the 3.7deg2 Spitzer extragalactic first look survey (XFLS; Fadda et al. 2006, Cat. J/AJ/131/2859). New Spitzer Infrared Spectrograph (IRS) observations were executed as part of the program with ID 20629. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 145 150 Coordinates, integration times, and photometric properties of the sources table2.dat 116 150 Redshift, absorption strength, and rest-frame 14um monochromatic luminosity measurements table3.dat 127 95 Fluxes and EWs of emission lines or features in the range 6.0um<λ<11.0um table4.dat 127 95 Fluxes and EWs of emission lines or features in the range 11.0um<λ<16.0um
See also: J/ApJ/693/370 : 24um flux-limited sample of galaxies (Weedman+, 2009) J/MNRAS/376/1251 : 610MHz observations of Spitzer XFLS (Garn+, 2007) J/AJ/131/2859 : Extragalactic First Look Survey: 24µm data (Fadda+, 2006) J/AJ/131/250 : Spitzer 70 and 160um observations in xFLS (Frayer+, 2006) J/AJ/128/1 : First Look Survey: NOAO R-band Mosaic (Fadda+, 2004) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [MIPS] 5- 9 I5 --- MIPS Galaxy identification (<[DYH2009] MIPS NNNNN> in Simbad) 11- 12 I2 h RAh Hour of right ascension (J2000) (1) 14- 15 I2 min RAm Minute of right ascension (J2000) 17- 20 F4.1 s RAs Second of right ascension (J2000) 22 A1 --- DE- Sign of declination (J2000) (1) 23- 24 I2 deg DEd Degree of declination (J2000) 26- 27 I2 arcmin DEm Arcminute of declination (J2000) 29- 32 F4.1 arcsec DEs Arcsecond of declination (J2000) 34- 36 I3 s tSL1 ? Integration time for IRS Short-Low module 1 38- 41 I4 s tLL2 Integration time for IRS Long-Low module 2 43- 46 I4 s tLL1 Integration time for IRS Long-Low module 1 48- 52 F5.2 mag Rmag ? R-band magnitude (Vega system) (2) 53- 55 A3 --- f_Rmag Flags on flux measurement in Rmag (3) 57 A1 --- l_F3.6 Limit flag on F3.6 58- 62 F5.1 uJy F3.6 ? Spitzer/IRAC 3.6um flux density (4) 64- 68 F5.2 uJy e_F3.6 ? F3.6 uncertainty 69- 73 A5 --- f_F3.6 Flags on flux measurement in F3.6 (3) 75 A1 --- l_F4.5 Limit flag on F4.5 76- 80 F5.1 uJy F4.5 ? Spitzer/IRAC 4.5um flux density (4) 82- 85 F4.1 uJy e_F4.5 ? F4.5 uncertainty 86- 90 A5 --- f_F4.5 Flags on flux measurement in F4.5 (3) 92 A1 --- l_F5.8 Limit flag on F5.8 93- 97 F5.1 uJy F5.8 Spitzer/IRAC 5.8um flux density (4) 99-103 F5.1 uJy e_F5.8 ? F5.8 uncertainty 104-106 A3 --- f_F5.8 Flags on flux measurement in F5.8 (3) 108-115 F8.3 uJy F8.0 Spitzer/IRAC 8.0um flux density (4) 117-121 F5.1 uJy e_F8.0 F8.0 uncertainty 122-124 A3 --- f_F8.0 Flags on flux measurement in F8.0 (3) 126-129 F4.2 mJy F24 Spitzer/MIPS 24um flux density (1) 131-134 F4.2 mJy e_F24 F24 uncertainty (1) 135 A1 --- f_F24 Flags on flux measurement in F24 (3) 137-140 F4.2 kpc Reff ? H-band effective radius (5) 142-145 F4.2 kpc e_Reff ? Reff uncertainty
Note (1): The 24um coordinates and fluxes of the targets taken from the catalog of Fadda et al. (2004, Cat. J/AJ/128/1). Note (2): The magnitudes are taken from Fadda et al. (2006, Cat. J/AJ/131/2859), unless otherwise noted. Undetected sources in the R band are fainter than 25.5 Vega magnitudes. Note (3): Notes on individual objects as follows: a = Two or more possibly interacting sources constitute the R-band counterpart of the 24um source. b = The identification of the optical counterpart is uncertain. c = We remeasured these R-band magnitudes from the catalog of Fadda et al. (2004, Cat. J/AJ/128/1) due to a problem in the detection or identification of the optical counterpart. d = Two or more sources are blended in this IRAC or MIPS channel. e = The IRAC flux is taken from the deep catalog of Lacy et al. (2005ApJS..161...41L). f = The flux measurement of the IRAC counterpart of the 24um source is uncertain due to the blending of two sources. g = The flux or limit was remeasured (often due to a misidentification). h = Two or more sources that could be at similar redshifts are comprised in the IRAC or MIPS flux. i = To recover the flux of this source, we first deblended it from its neighbor(s) using PSF fitting that was carried out with GALFIT. Once the best-fitting parameters were determined, we removed the neighbor(s) and measured the flux of the source using SExtractor, as for all other sources. j = This source is blended with a star. Its flux cannot be recovered. Note (4): IRAC fluxes of the sources, taken from Lacy et al. (2004ApJS..154..166L), unless otherwise noted. Because the Lacy et al. catalog limits are computed based on completeness levels (instead of noise levels), we remeasured the flux limits for all sources that were undetected in any of the IRAC channels. Note (5): H-band effective radii of the sources measured with SExtractor from HST NICMOS images. In this table, we present Reff measurements for sources with known redshift that can be used for the comparison of their radial extents with their MIR spectral feature properties. The full data set will be presented in M. Zamojski et al. (2011ApJ...730..125Z). For consistency with the photometry in all other bands, closely interacting systems have been treated as a single object.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [MIPS] 5- 9 I5 --- MIPS Galaxy identification (<[DYH2009] MIPS NNNNN> in Simbad) 11- 12 A2 --- l_z [≥] Limit flag on z 13- 16 F4.2 --- z ? Redshift from MIR spectra 18- 21 F4.2 --- e_z ? z uncertainty (6) 23- 27 A5 --- q_z [a-g, ] z confidence (7) 29- 84 A56 --- EmL Emission lines or dust features (8) 86-103 A18 --- Abs Absorption feature (9) 105-108 F4.2 --- tau ? 9.7um silicate feature optical depth (10) 110-116 E7.3 Lsun nuLnu ? Rest-frame monochromatic 14um luminosity for sources with reliable redshifts
Note (6): Uncertainties are given for all sources that have more than two 3σ detected emission lines or features. For all other sources, the plausible redshift uncertainty is in the range [0.01, 0.3]. Note (7): Classification of the confidence of the MIR redshift as follows: a = The redshift is confirmed by more than two emission lines or features that have >3σ detections. b = The redshift is either derived from a single emission line but confirmed from the 9.7um silicate absorption feature or measured from the silicate absorption feature. The uncertainty in this redshift measurement is typically of order 0.1, but it can be as high as 0.3. c = The redshift is measured from a single emission line and confirmed by the presence of part of the 9.7um silicate feature in the spectrum. The accuracy of the measurement can be lower than that of category b. d = More than one solutions are possible. This redshift is uncertain. e = Only one line or feature had a significant detection. This redshift is uncertain. f = Only part of the 9.7um silicate absorption feature was seen in the IRS spectral range, or the silicate feature had a very small optical depth, <0.1. This redshift is uncertain. g = This spectrum contains features of two spatially unresolved sources, one at z=0.84, and a somewhat fainter at z=0.91. This could either be a binary merging system, or sources that neighbor each other due to projection effects. Note (8): Emission lines or dust features used for the computation of each source's redshift. These features have a signal-to-noise ratio greater than 3 when fitted with a Lorentzian profile. Unless otherwise noted, the 12.7 complex refers to the blended 12.6 and 12.7um dust features and the [NeII] line. Note (9): Indicates whether the 9.7um silicate absorption feature was used in the redshift computation. Partially detected silicate absorption features were not used for that purpose. Note (10): The 9.7um silicate feature optical depth was measured with PAHFIT for sources with reliable redshifts, i.e., with confidence classification a, b, or c in Column "Conf".
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [MIPS] 5- 9 I5 --- MIPS Galaxy identification (<[DYH2009] MIPS NNNNN> in Simbad) 11 A1 --- l_F6.2 Limit flag on F6.2 12- 19 E8.3 W/cm2 F6.2 ? 6.2um flux density (G1) 21- 28 E8.3 W/cm2 e_F6.2 ? F6.2 uncertainty 30- 33 F4.2 um W(6.2) ? Equivalent width at 6.2um 35- 38 F4.2 um e_W(6.2) ? W(6.2) uncertainty (G2) 39 A1 --- f_W(6.2) [a] Flag on W(6.2) (G2) 41 A1 --- l_F7.7 Limit flag on F7.7 42- 49 E8.3 W/cm2 F7.7 ? 7.7um flux density (G1) 51- 58 E8.3 W/cm2 e_F7.7 ? F7.7 uncertainty 60- 64 F5.2 um W(7.7) ? Equivalent width at 7.7um 66- 69 F4.2 um e_W(7.7) ? W(7.7) uncertainty 71 A1 --- l_F8.6 Limit flag on F8.6 72- 79 E8.3 W/cm2 F8.6 ? 8.6um flux density (G1) 81- 88 E8.3 W/cm2 e_F8.6 ? F8.6 uncertainty 90- 93 F4.2 um W(8.6) ? Equivalent width at 8.6um 95- 98 F4.2 um e_W(8.6) ? W(8.6) uncertainty 100 A1 --- l_FSIV Limit flag on FSIV 101-108 E8.3 W/cm2 FSIV ? SIV flux density (G1) 110-117 E8.3 W/cm2 e_FSIV ? FSIV uncertainty 119-122 F4.2 um W(SIV) ? Equivalent width in SIV 124-127 F4.2 um e_W(SIV) ? W(SIV) uncertainty
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [MIPS] 5- 9 I5 --- MIPS Galaxy identification (<[DYH2009] MIPS NNNNN> in Simbad) 11 A1 --- l_F11.3 Limit flag on F11.3 12- 19 E8.3 W/cm2 F11.3 ? 11.3um flux density (G1) 21- 28 E8.3 W/cm2 e_F11.3 ? F11.3 uncertainty 30- 33 F4.2 um W(11.3) ? Equivalent width at 11.3um 35- 38 F4.2 um e_W(11.3) ? W(11.3) uncertainty 40 A1 --- l_F12.7 Limit flag on F12.7 41- 48 E8.3 W/cm2 F12.7 ? 12.7um flux density (G1) 50- 57 E8.3 W/cm2 e_F12.7 ? F12.7 uncertainty 59- 62 F4.2 um W(12.7) ? Equivalent width at 12.7um 64- 67 F4.2 um e_W(12.7) ? W(12.7) uncertainty 69 A1 --- l_FNeII Limit flag on FNeII 70- 77 E8.3 W/cm2 FNeII ? NeII flux density (G1) 79- 86 E8.3 W/cm2 e_FNeII ? FNeII uncertainty 88- 91 F4.2 um W(NeII) ? Equivalent width in NeII 93- 96 F4.2 um e_W(NeII) ? W(NeII) uncertainty (G2) 97 A1 --- f_W(NeII) [a] Flag on W(NeII) (G2) 99 A1 --- l_FNeIII Limit flag on FNeIII 100-107 E8.3 W/cm2 FNeIII ? NeIII flux density (G1) 109-116 E8.3 W/cm2 e_FNeIII ? FNeIII uncertainty 118-121 F4.2 um W(NeIII) ? Equivalent width in NeIII 123-126 F4.2 um e_W(NeIII) ? W(NeIII) uncertainty (G2) 127 A1 --- f_W(NeIII) [a] Flag on W(NeIII) (G2)
Global Notes: Note (G1): Fluxes may not be given for lines that are in the IRS wavelength range when their neighboring continuum cannot be well determined. Note (G2): Error bars of 0 correspond to EW uncertainties that are lower than the selected measurement accuracy.
History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 14-Sep-2011
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