J/A+A/588/A141 The MWA view of Fermi blazars (Giroletti+, 2016)
High-energy sources at low radio frequency: the Murchison Widefield Array
view of Fermi blazars.
Giroletti M., Massaro F., D'Abrusco R., Lico R., Burlon D.,
Hurley-Walker N., Johnston-Hollitt M., Morgan J., Pavlidou V., Bell M.,
Bernardi G., Bhat R., Bowman J.D., Briggs F., Cappallo R.J., Corey B.E.,
Deshpande A.A., Ewall-Rice A., Emrich D., Gaensler B.M., Goeke R.,
Greenhill L.J., Hazelton B.J., Hindson L., Kaplan D.L., Kasper J.C.,
Kratzenberg E., Feng L., Jacobs D., Kurdryavtseva N., Lenc E.,
Lonsdale C.J., Lynch M.J., McKinley B., McWhirter S.R., Mitchell D.A.,
Morales M.F., Morgan E., Oberoi D., Offringa A.R., Ord S.M., Pindor B.,
Prabu T., Procopio P., Riding J., Rogers A.E.E., Roshi A.,
Udaya Shankar N., Srivani K.S., Subrahmanyan R., Tingay S.J., Waterson M.,
Wayth R.B., Webster R.L., Whitney A.R., Williams A., Williams C.L.
<Astron. Astrophys. 588, A141 (2016)>
=2016A&A...588A.141G 2016A&A...588A.141G (SIMBAD/NED BibCode)
ADC_Keywords: BL Lac objects ; Gamma rays ; QSOs ; Radio continuum
Keywords: BL Lacertae objects: general - catalogues - gamma rays: galaxies -
quasars: general - radiation mechanisms: non-thermal -
radio continuum: galaxies
Abstract:
Low-frequency radio arrays are opening a new window for the study of
the sky, both to study new phenomena and to better characterize known
source classes. Being flat-spectrum sources, blazars are so far poorly
studied at low radio frequencies.
We characterize the spectral properties of the blazar population at
low radio frequency, compare the radio and high-energy properties of
the gamma-ray blazar population, and search for radio counterparts of
unidentified gamma-ray sources.
We cross-correlated the 6100-deg2 Murchison Widefield Array
Commissioning Survey catalogue with the Roma blazar catalogue, the
third catalogue of active galactic nuclei detected by Fermi-LAT, and
the unidentified members of the entire third catalogue of gamma-ray
sources detected by Fermi-LAT. When available, we also added
high-frequency radio data from the Australia Telescope 20GHz
catalogue.
Description:
We have cross-matched the Tables 5, 6, and 7 report the results of the
cross-matching of the Murchison Widefield Array Commissioning Survey
(MWACS) catalogue with the list of all known blazars (BZCat, Table 5),
with the third Fermi Large Area Telescope (LAT) Catalog (3LAC, Table
6), and with the list of un-associated sources in the third Fermi
Gamma-ray source list (3FGL, Table 7).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 73 186 MWACS-BZCat sources
table6.dat 100 87 MWACS-3LAC sources
table7.dat 71 13 UGS with MWACS sources in the 95% error ellipse
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See also:
VIII/98 : 180MHz Murchison Commissioning Survey (MWACS)
(Hurley-Walker+, 2014)
VII/274 : The Roma BZCAT - 5th edition (Massaro+, 2015)
J/ApJ/810/14 : Third catalog of LAT-detected AGNs (3LAC) (Ackermann+, 2015)
J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)
J/A+A/495/691 : Multifrequency catalogue of blazars, Roma-BZCAT (Massaro+ 2009)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- BZ BZCat name (5BZA JHHMM+DDMM)
17- 21 A5 --- Class Optical Class (1)
24- 30 F7.5 --- z ? Redshift
32- 36 I5 mJy S1 Flux density at 0.8/1.4GHz (2)
37 A1 --- n_S1 [*] * for flux density at 1.4GHz, else 0.8GHz
38- 49 A12 --- MWACS MWACS name (JHHMM.m+DDMM)
51- 55 F5.2 Jy S0.18 Flux density at 180MHz
57- 60 F4.2 Jy e_S0.18 Flux density uncertainty at 180MHz
62- 66 F5.2 --- alow Spectral index between 120 and 180 MHZ
68- 71 F4.2 --- e_alow Spectral index uncertainty
73 A1 --- Flag Spectral index flag (3)
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Note (1): Optical Class as follows:
fsrq = Flat Spectrum Radio Quasar
bll = BL Lac type object
bll-c = BL Lac candidate
bll-g = BL Lac with a significant dominance of the galaxy
bcu = blazar of uncertain type
Note (2): Reported flux density is measured at 0.8GHz or 1.4GHz for sources at
declination lower or greater than -30°, respectively.
Note (3): MWACS spectral fit flag as follows:
0 = no problem
1 = spectral index determined by integrating an extended source
2 = forced fit
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 3FGL 3FGL name (3FGL JHHMM.m+DDMM)
19- 32 A14 --- OName Other name
34- 40 F7.5 --- z ? Redshift
42- 45 A4 --- Class Classification (1)
47- 51 F5.1 10-15W/m2 Sgamma Gamma-ray energy flux at E>0.1GeV
(units of 10-12erg/s/cm2)
53- 55 F3.1 10-15W/m2 e_Sgamma Error on gamma-ray energy flux at E>0.1GeV
(units of 10-12erg/s/cm2)
57- 60 F4.2 --- Gamma Gamma-ray photon index
62- 65 F4.2 --- e_Gamma Error on gamma-ray photon index
67- 78 A12 --- MWACS MWACS name (JHHMM.m+DDMM)
80- 84 F5.2 Jy S0.18 Flux density at 180MHz
86- 89 F4.2 Jy e_S0.18 Flux density uncertainty at 180MHz
91- 95 F5.2 --- alow Spectral index between 120 and 180MHZ
97-100 F4.2 --- e_alow Spectral index uncertainty
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Note (1): Classification at follows:
fsrq = Flat Spectrum Radio Quasar
bll = BL Lac type object
bcu = blazar of uncertain type (BCU I in 3LAC)
cand = blazar candidate (BCU II or BCU III in 3LAC)
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- 3FGL 3FGL name (3FGL JHHMM.m+DDMM)
19- 22 F4.2 10-5W/m2 Sgamma Gamma-ray energy flux at E>0.1GeV
(units of 10-12erg/s/cm2)
24- 27 F4.2 10-5W/m2 e_Sgamma Error on gamma-ray energy flux at E>0.1GeV
(units of 10-12erg/s/cm2)
29- 32 F4.2 --- Gamma Gamma-ray photon index
34- 37 F4.2 --- e_Gamma Error on gamma-ray photon index
39- 50 A12 --- MWACS MWACS name (JHHMM.m+DDMM)
52- 55 F4.2 Jy S0.18 Flux density at 180MHz
57- 60 F4.2 Jy e_S0.18 Flux density uncertainty at 180MHz
62- 66 F5.2 --- alow Spectral index between 120 and 180MHZ
68- 71 F4.2 --- e_alow Spectral index uncertainty
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Acknowledgements:
Marcello Giroletti, mgirolet(at)gmail.com
(End) Marcello Giroletti [INAF], Patricia Vannier [CDS] 10-Feb-2016