J/AN/330/223 High frequency peakers. The faint sample (Stanghellini+, 2009)
High Frequency Peakers: the faint sample.
Stanghellini C., Dallacasa D., Orienti M.
<Astron. Nachrichten., 330, 223-225 (2009)>
=2009AN....330..223S 2009AN....330..223S
ADC_Keywords: Galaxies, radio ; QSOs ; Radio lines
Keywords: galaxies: active - radio continuum: galaxies - quasars: general
Abstract:
We present a sample of sources with convex radio spectra peaking at
frequencies above a few GHz, known as "High Frequency Peakers"
(HFPs). A "bright" sample with a flux density limit of 300mJy at
5GHz has been presented by Dallacasa et al. (2000, Cat.
J/A+A/363/887). Here we present the "faint" sample with flux
density between 50 and 300mJy at 5GHz, restricted to the area around
the North Galactic Cap, where the FIRST catalogue is available. The
candidates have been observed with the VLA at several frequencies
ranging from 1.4 to 22GHz, in order to derive a simultaneous radio
spectrum. The final list of confirmed HFP sources consists of 61
objects.
Description:
We have observed at the VLA the whole "faint" sample during
several observing runs between November 1998 and February 2000
measuring nearly simultaneous flux densities in L band (with the two
IFs at 1.365 and 1.665GHz), C band (4.535 and 4.985GHz), X band
(8.085 and 8.485GHz), U band (14.935 and 14.985GHz) and K band
(22.435 and 22.485GHz).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 115 61 Faint sample. Optical info is based on the NED
or is derived from the SDSS
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See also:
J/A+A/363/887 : High frequency peakers. I. The bright sample (Dallacasa+, 2000)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Name (JHHMM+DDMM)
12 A1 --- Obs [a-i] Code for observation date and config. (1)
14 A1 --- OT [gqs] Optical identification: g=galaxy,
q=quasar, s=star
15- 19 F5.2 mag mag ?=- Magnitude in band specified in n_mag
20 A1 --- n_mag [rRB] Band of magnitude
21 A1 --- u_mag [?] uncertainty flag on mag
22 A1 --- l_z Limit flag on z
23- 27 F5.3 --- z ?=- Redshift
28 A1 --- f_z [p] p for photometric redshift
30- 31 I2 h RAh Right ascension (J2000)
33- 34 I2 min RAm Right ascension (J2000)
36- 40 F5.2 s RAs Right ascension (J2000)
42 A1 --- DE- Declination sign (J2000)
43- 44 I2 deg DEd Declination (J2000)
46- 47 I2 arcmin DEm Declination (J2000)
49- 52 F4.1 arcsec DEs Declination (J2000)
54 A1 --- l_S1.4 [~] Limit flag on S1.4
55- 59 F5.1 mJy S1.4 Flux density at 1.4GHz
60 A1 --- u_S1.4 [?] uncertainty flag on S1.4
62 A1 --- l_S1.7 [~] Limit flag on S1.7
63- 67 F5.1 mJy S1.7 Flux density at 1.7GHz
69 A1 --- l_S4.5 [~] Limit flag on S4.5
70- 74 F5.1 mJy S4.5 Flux density at 4.5GHz
76- 80 F5.1 mJy S5.0 Flux density at 5.0GHz
82- 86 F5.1 mJy S8.1 Flux density at 8.1GHz
88- 92 F5.1 mJy S8.5 Flux density at 8.5GHz
94- 98 F5.1 mJy S15 Flux density at 15GHz
100-104 F5.1 mJy S22 Flux density at 22GHz
107-110 F4.1 GHz num ?=- Spectral peak frequency
111 A1 --- u_num [?] uncertainty flag on num
113-115 I3 mJy Sm ?=- Spectral peak flux density
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Note (1): Observation code is:
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Code Date Config. Obs.Time
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a 07 Nov 1998 BnC 150
b 14 Nov 1998 BnC 150
c 19 Dec 1998 C 240
d 14 Jun 1999 AnD 420
e 21 Jun 1999 AnD 180
f 25 Jun 1999 A 120
g 25 Sep 1999 A 240
h 15 Oct 1999 BnA 240
i 25 Feb 2000 BnC 240
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Aug-2013