J/AJ/132/2159 IRAC counterparts of 6cm galaxies in EGS (Willner+, 2006)
Mid-infrared identification of 6 cm radio-source counterparts in the
Extended Groth Strip.
Willner S.P., Coil A.L., Goss W.M., Ashby M.L.N., Barmby P., Huang J.-S.,
Ivison R., Koo D.C., Egami E., Miyazaki S.
<Astron. J., 132, 2159-2170 (2006)>
=2006AJ....132.2159W 2006AJ....132.2159W
ADC_Keywords: Galaxies, radio ; Photometry, infrared
Keywords: galaxies: active - galaxies: general - galaxies: high-redshift -
infrared: galaxies - radio continuum: galaxies
Abstract:
A new 6cm survey of almost 0.6deg2 to a limit of 0.55mJy/beam
(10sigma) finds 37 isolated radio sources and seven radio-source pairs
(not necessarily physical companions). Infrared Array Camera (IRAC)
counterparts are identified for at least 92% of the radio sources
within the area of deep IRAC coverage, which includes 31 isolated
sources and six pairs. This contrasts with an identification rate of
<74% to R<23.95 in visible light. Eight of the IRAC galaxies have
power-law spectral energy distributions, implying that the
mid-infrared emission comes from a powerful active galactic nucleus
(AGN). The remaining 26 IRAC galaxies show stellar emission in the
mid-infrared, probably in most of these galaxies because the stellar
emission is bright enough to outshine an underlying AGN.
Description:
The observations were obtained at the VLA in BnA configuration for a
total of 19hr over 3-days, from 2003 October 11 to 13 (program AW615).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 95 54 EGS (Extended Groth Strip) 6cm Radio Sources
table3.dat 86 34 IRAC Counterparts to Radio Sources
table4.dat 62 35 Photometry
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See also:
J/ApJ/642/126 : Mid-IR observations in Extended Groth Strip (Barmby+, 2006)
J/MNRAS/382/109 : Massive galaxies in Extended Groth Strip (Trujillo+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- n_EGS06 [IP] I for Isolated Sources,
P for Possible Multiple Sources
3- 4 I2 --- EGS06 Name (EGS06 NN in Simbad)
5- 7 A3 ---- Name2 EGS06 name for double sources (1)
9- 10 I2 h RAh ? Right ascension (J2000.0) (2)
12- 13 I2 min RAm ? Right ascension (J2000.0)
15- 19 F5.2 s RAs ? Right ascension (J2000.0)
21 A1 --- DE- Declination sign (J2000.0) (2)
22- 23 I2 deg DEd ? Declination (J2000.0)
25- 26 I2 arcmin DEm ? Declination (J2000.0)
28- 31 F4.1 arcsec DEs ? Declination (J2000.0)
32 A1 --- n_Pos [t] t for total (2 or 3 sources), no position (1)
34- 37 F4.2 --- PBcorr ?=- Primary beam correction, which has been
applied to the flux densities
39- 43 F5.2 mJy Stot Total flux density at 6cm
45- 48 F4.2 mJy e_Stot rms uncertainty on Stot
50- 52 F3.1 arcsec amaj ?=- Major Axis (3)
54 A1 --- l_amin Limit flag on amin
55- 57 F3.1 arcsec amin ?=- Minor Axis (3)
59- 95 A37 ---- Com Comments
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Note (1): Sources are considered possible multiples if there are two
resolved components within 15. Combined flux densities are given only
if the two components are potentially blended in the radio data.
Note (2): Systematic position uncertainties are 0.1" rms.
Note (3): after deconvolving the synthesized beam.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1 A1 --- n_EGS06 [IP] I for Isolated Radio Sources,
P for Possible Radio Doubles
3- 4 I2 --- EGS06 Name (EGS06 NN in Simbad)
5- 7 A3 --- Name2 ? EGS06 name for double sources
9- 10 I2 h RAh ? Right ascension (J2000.0) (2)
12- 13 I2 min RAm ? Right ascension (J2000.0)
15- 19 F5.2 s RAs ? Right ascension (J2000.0)
21 A1 --- DE- Declination sign (J2000.0) (2)
22- 23 I2 deg DEd ? Declination (J2000.0)
25- 26 I2 arcmin DEm ? Declination (J2000.0)
28- 31 F4.1 arcsec DEs ? Declination (J2000.0)
33- 35 F3.1 arcsec Sep ?=- Separation
37- 85 A49 --- Com Comments (1)
86 A1 --- n_Com [a] Note for EGS06 19 (2)
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Note (1): Redshifts and spectral classifications are from the DEEP2 survey
(Davis et al. 2003, Proc. SPIE, 4834, 161). Comment "X-ray" indicates
detection by either Chandra (Nandra et al., 2005, J/MNRAS/356/568) or
XMM-Newton (Waskett et al., 2003MNRAS.341.1217W 2003MNRAS.341.1217W).
Note (2): For EGS06 19, Hammer et al. (1995MNRAS.276.1085H 1995MNRAS.276.1085H) found z=0.838
and elliptical classification for EGS06 19 = 15V 34, but the DEEP2
redshift seems certain. See Appendix.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- EGS06 ? Name (EGS06 NN in Simbad)
3- 5 A3 --- Name2 EGS06 name for double sources
6 A1 --- n_EGS06 [N] N for noise data (1)
9 A1 --- l_SBband Limit flag on SBband
10- 14 F5.2 uJy SBband ?=- Flux density in B band
16- 20 F5.2 uJy SRband ?=- Flux density in R band
22- 27 F6.2 uJy SIband ?=- Flux density in I band
28 A1 --- u_SIband Uncertainty flag on SIband
30- 34 F5.1 uJy S3.6um ?=- Flux density at 3.6um
35 A1 --- u_S3.6um Uncertainty flag on S3.6um (2)
37- 41 F5.1 uJy S4.5um ?=- Flux density at 4.5um
42 A1 --- u_S4.5um Uncertainty flag on S4.5um (2)
44- 48 F5.1 uJy S5.8um ?=- Flux density at 5.8um
49 A1 --- u_S5.8um Uncertainty flag on S5.8um (2)
51- 56 F6.2 uJy S8.0um ?=- Flux density at 8.0um
57 A1 --- u_S8.0um Uncertainty flag on S8.0um (2)
59- 61 I3 uJy S24um ?=- Flux density at 24um
62 A1 --- n_S24um [a] Note on S24um (3)
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Note (1): N for Noise. Typical uncertainty from photon noise alone.
See text for discussion of additional measurement uncertainties.
Note (2): Colon indicates photometric uncertainty ≳30%.
Note (3): Blended with other sources; see Fig. 2.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 24-Jul-2008