J/MNRAS/480/707 Stripe 82 1-2 GHz VLA Snapshot Survey (Prescott+, 2018)
The Stripe 82 1-2 GHz VLA Snapshot Survey: multiwavelength counterparts.
Prescott M., Whittam I. H., Jarvis M. J., McAlpine K., Richter L. L.,
Fine S., Mauch T., Heywood I., Vaccari M.
<Mon. Not. R. Astron. Soc. 480, 707 (2018)>
=2018MNRAS.480..707P 2018MNRAS.480..707P (SIMBAD/NED BibCode)
ADC_Keywords: Surveys
Keywords: catalogues - surveys - galaxies: active - galaxies: evolution -
radio continuum: galaxies
Abstract:
We have combined spectroscopic and photometric data from the Sloan
Digital Sky Survey with 1.4GHz radio observations, conducted as part
of the Stripe 82 1-2GHz Snapshot Survey using the Karl G. Jansky Very
Large Array, which covers ∼100 sq deg, to a flux limit of 88uJy rms.
Cross-matching the 11768 radio source components with optical data
via visual inspection results in a final sample of 4794 cross-matched
objects, of which 1996 have spectroscopic redshifts and 2798 objects
have photometric redshifts.
Three previously undiscovered giant radio galaxies were found during
the cross-matching process, which would have been missed using
automated techniques. For the objects with spectroscopy, we separate
radio-loud active galactic nuclei (AGN) and star-forming galaxies
(SFGs) using three diagnostics and then further divide our radio-loud
AGN into the high and low excitation radio galaxy (HERG and LERG)
populations. A control-matched sample of HERGs and LERGs, matched on
stellar mass, redshift, and radio luminosity, reveals that the host
galaxies of LERGs are redder and more concentrated than HERGs. By
combining with near-infrared data, we demonstrate that LERGs also
follow a tight K-z relationship. These results imply the LERG
populations are hosted by population of massive, passively evolving
early-type galaxies. We go on to show that HERGs, LERGs, quasars, and
SFGs in our sample all reside in different regions of a Wide-field
Infrared Survey Explorer colour-colour diagram. This cross-matched
sample bridges the gap between previous 'wide but shallow' and 'deep
but narrow' samples and will be useful for a number of future
investigations.
Description:
Radio data from the Stripe 82 1-2 GHz Snapshot Survey of Heywood et.
al. (2016, Cat. J/MNRAS/460/4433) has been visually inspected and
combined with optical data from the Sloan Digital Sky Survey.
The catalogue contains data for 4794 cross-matched objects, of which
1996 have spectroscopic redshifts and 2798 objects have photometric
redshifts. See the source paper for more details.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
s82cat.dat 370 4795 S82 cross-matched catalogue
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See also:
J/MNRAS/460/4433 : SDSS Stripe 82 VLA 1-2GHz survey (Heywood+, 2016)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: s82cat.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- CatID Unique ID column (CATID)
9- 28 A20 --- RadioID RADIO ID of brightest radio source
component (JHHMMSS.ss+DDMMSS.ss)(RADIOID)
30- 37 F8.4 deg RAdeg Right ascension (J2000) of radio source
(RADIORA)
39- 47 F9.5 deg DEdeg Declination (J2000) of radio source
(RADIODEC)
49- 60 F12.7 mJy Fint Integrated flux of radio source (INT_FLUX)
62- 72 F11.7 mJy e_Fint Error on the integrated flux (INT_FLUXERR)
74- 80 F7.2 mJy/beam Fpeak Peak Flux of radio source (PEAK_FLUX)
82- 85 F4.2 mJy/beam e_Fpeak Error on the peak flux (PEAK_FLUXERR)
87- 96 F10.6 uJy rms RMS of radio source (RMS)
98-104 F7.4 --- Ncomp Number of radio source components (N_COMP)
106-124 I19 --- ObjID SDSS OBJID of optical counterpart
(SDSS_OBJID)
126-144 F19.15 deg RASdeg SDSS right ascension of optical
counterpart (RA)
146-166 F21.18 deg DESdeg SDSS Declination of optical counterpart
(DEC)
168-177 F10.7 mag u0mag SDSS de-reddened u-band magnitude
(dered_u)
179-188 F10.7 mag g0mag SDSS de-reddened g-band magnitude
(dered_g)
190-199 F10.7 mag r0mag SDSS de-reddened r-band magnitude
(dered_r)
201-210 F10.7 mag i0mag SDSS de-reddened i-band magnitude
(dered_i)
212-221 F10.7 mag z0mag SDSS de-reddened z-band magnitude
(dered_z)
223-235 F13.10 mag e_u0mag Error on SDSS u-band magnitude (err_u)
237-248 F12.10 mag e_g0mag Error on SDSS g-band magnitude (err_g)
250-261 F12.10 mag e_r0mag Error on SDSS r-band magnitude (err_r)
263-274 F12.10 mag e_i0mag Error on SDSS i-band magnitude (err_i)
276-287 F12.10 mag e_z0mag Error on SDSS z-band magnitude (err_z)
289 I1 --- SpecFlag [0/1] Spectroscopic z = 1,
Photometric z = 0 (SPECFLAG)
291-298 F8.6 --- zphot ? Photometric redshift from Reis et al.
2012ApJ...747...59R 2012ApJ...747...59R (Z_PHOT)
300-307 F8.6 --- e_zphot ? Error on the photometric redshift
(Z_PHOTERR)
309-328 F20.18 --- zspec ? SDSS DR14 Spectroscopic redshift
(Z_SPEC)
330-351 E22.17 --- e_zspec []? SDSS DR14 Spectroscopic redshift error
(Z_SPECERR)
352-354 I3 --- zWarning ? SDSS Z_Warning for spectroscopic
redshift (Z_Warning)
356-361 A6 --- SDSSSurvey SDSS Survey (SDSS_SURVEY)
363-368 A6 --- SDSSClass SDSS Class from SDSS Pipeline (SDSS_CLASS)
370 I1 --- SDSSType [3/6]? SDSS TYPE, either 3 or 6
(SDSS_TYPE) (1)
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Note (1): SDSSType as follows:
3 = Galaxy
6 = Star
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Acknowledgements:
Matt Prescott, matt.x.prescott(at)gmail.com
(End) Matt Prescott [UWC], Patricia Vannier [CDS] 30-Aug-2018