J/A+A/549/A133 Bright northern radio sources with VLA/JVLA (Kurinsky+, 2013)
VLA/JVLA monitoring of bright northern radio sources.
Kurinsky N., Sajina A., Partridge B., Myers S., Chen X., Lopez-caniego M.
<Astron. Astrophys., 549, A133 (2013)>
=2013A&A...549A.133K 2013A&A...549A.133K
ADC_Keywords: Radio sources ; Radio continuum ; Galaxies, radio
Keywords: radio continuum: galaxies - galaxies: active - catalogs
Abstract:
We report multiple epoch VLA/JVLA observations of 89 northern
hemisphere sources, most with 37GHz flux density >1Jy, observed
at 4.8, 8.5, 33.5, and 43.3GHz. The high frequency selection leads
to a predominantly flat spectrum sample, with 85% of our sources being
in the Planck Early Release Compact Source Catalog (ERCSC, Cat.
VIII/88). These observations allow us to: 1) validate Planck's 30 and
44GHz flux density scale; 2) extend the radio spectral energy
distributions of Planck sources to lower frequencies allowing for the
full 5-857GHz regime to be studied; and 3) characterize the
variability of these sources. At 30GHz and 44GHz, the JVLA and Planck
flux densities agree to within ∼3%. On timescales of less than two
months the median variability of our sources is 2%. On timescales of
about a year the median variability increases to 14%. Using the WMAP
7-year data, the 30GHz median variability on a 1-6 years timescale is
16%.
Description:
Our observations were made in two intervals of time, separated by
approximately 6 months during which the NRAO array was down during the
conversion from the VLA to the JVLA. In our earlier VLA observations,
we used the K band detectors, centered at 22.46GHz, whereas after the
conversion to the JVLA, we switched to the Ka band (33.45GHz). The
Ka band is preferable to K band, because it is closer to Planck's
lowest frequency of 28.46GHz, and also less affected by the
atmospheric water vapor line at 22GHz.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 99 162 VLA/JVLA source coordinates and flux densities
table4.dat 176 152 Matches of our VLA/JVLA sources with sources
in the Planck ERCSC catalog (VIII/88)
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See also:
VIII/88 : Planck Early Release Compact Source Catalogue (Planck, 2011)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Source Source name (JHHMM+DDMM)
12- 22 F11.7 deg RAdeg Right ascension in decimal degrees (J2000)
24- 33 F10.7 deg DEdeg Declination in decimal degrees (J2000)
35- 42 A8 "YYYYMMDD" ObsDate Observation date
44- 50 F7.1 mJy SC ?=- Flux density in C (5GHz) band
52- 56 F5.1 mJy e_SC ?=- rms uncertainty on SC (1)
58- 64 F7.1 mJy SX ?=- Flux density in X (8GHz) band
66- 70 F5.1 mJy e_SX ?=- rms uncertainty on SX (1)
72 A1 --- n_SKa [*] * when observations done at K (22GHz)
instead of Ka (33GHz), see n_SKa
73- 79 F7.1 mJy SKa ?=- Flux density in Ka band (33.45GHz) or
K band (22.46GHz)
81- 85 F5.1 mJy e_SKa ?=- rms uncertainty on SKa (1)
87- 93 F7.1 mJy SQ ?=- Flux density in Q (43.22GHz.22) band
95- 99 F5.1 mJy e_SQ ?=- rms uncertainty on SQ (1)
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Note (1): Errors include statistical error as well as calibration uncertainty.
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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- 10 A10 --- Source Source name (JHHMM+DDMM)
12- 21 A10 --- --- [PLCKERC030]
23- 35 A13 --- PLCKERC Planck name (GLLL.ll+BB.bb)
37 A1 --- Obs [PV] Observation, V for (J)VLA, P for Planck
39-176 A138 --- ObsDates Observation date(s) for (J)VLA or Planck
(YYYYMMDD)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 26-Apr-2013