J/A+A/535/A69 AGN Fermi/LAT γ-ray and 37GHz fluxes (Nieppola+, 2011)
Correlation between Fermi/LAT gamma-ray and 37 GHz radio properties of
northern AGN averaged over 11 months.
Nieppola E., Tornikoski M., Valtaoja E., Leon-Tavares J., Hovatta T.,
Laehteenmaeki A., Tammi J.
<Astron. Astrophys., 535, A69 (2011)>
=2011A&A...535A..69N 2011A&A...535A..69N
ADC_Keywords: Active gal. nuclei ; QSOs ; Radio sources ; Gamma rays
Keywords: quasars: general - galaxies: active -
radiation mechanisms: non-thermal - BL Lacertae objects: general
Abstract:
Although the Fermi mission has increased our knowledge of γ-ray
AGN, many questions remain, such as the site of γ-ray production,
the emission mechanism, and the factors that govern the strength of
the emission. Using data from a high radio band, 37GHz, uncontaminated
by other radiation components besides the jet emission, we study these
questions with averaged flux densities over the the first year of
Fermi operations.
We look for possible correlations between the 100MeV-100GeV band used
by the Fermi satellite and 37GHz radio band observed at the Aalto
University Metsahovi Radio Telescope, as well as for differences
between the γ-ray emission of different AGN subsamples. We use
data averaged over the 1FGL period. Our sample includes 249 northern
AGN, including a complete sample of 68 northern AGN with a measured
average flux density exceeding 1Jy.
Description:
Our radio data include unpublished 37GHz flux density measurements
from the Aalto University Metsahovi Radio Observatory. Metsahovi
radio telescope is a radome-enclosed antenna with a diameter of 13.7m.
It is situated in Kirkkonummi, Finland, at 60m above sea level.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 69 249 The sample sources used in this study and their
classifications
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See also:
J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Name Source name
19- 30 A12 --- 1FGL 1FGL name (JHHMM.m+DDMM)
32- 34 A3 --- Class Classification (1)
36 A1 --- C [C] C for objects belonging in the complete
sample
38- 43 F6.2 deg RAdeg Right ascension in decimal degrees (J2000)
45- 50 F6.2 deg DEdeg Declination in decimal degrees (J2000)
52- 55 F4.2 --- z ? Redshift
57 A1 --- l_Sr Limit flag on Sr
58- 62 F5.2 Jy Sr ? Radio flux density at 37GHz
64- 69 F6.2 [mW/m2] logSg ? Fermi/LAT γ-ray flux
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Note (1): classes are:
BLO = BL Lac objects;
GAL = on-quasar radio galaxies
HPQ = high polarization quasars
LPQ = low-polarization quasars
QSO = quasars
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Feb-2012