J/MNRAS/474/5049 Low-frequency study of 3C 31 with LOFAR (Heesen+, 2018)
LOFAR reveals the giant: a low-frequency radio continuum study of the outflow
in the nearby FR I radio galaxy 3C 31.
Heesen V., Croston J.H., Morganti R., Hardcastle M.J., Stewart A.J.,
Best P.N., Broderick J.W., Brueggen M., Brunetti G., Chyzy K.T.,
Harwood J.J., Haverkorn M., Hess K.M., Intema H.T., Jamrozy M.,
Kunert-Bajraszewska M., McKean J.P., Orru E., Roettgering H.J.A.,
Shimwell T.W., Shulevski A., White G.J., Wilcots E.M., Williams W.L.
<Mon. Not. R. Astron. Soc. 474, 5049 (2018)>
=2018MNRAS.474.5049H 2018MNRAS.474.5049H (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Galaxies, radio ; Energy distributions
Keywords: radiation mechanisms: non-thermal - cosmic rays - galaxies: active -
galaxies: individual: 3C 31 - radio continuum: galaxies
Abstract:
We present a deep, low-frequency radio continuum study of the nearby
Fanaroff-Riley class I (FR I) radio galaxy 3C 31 using a combination
of LOw Frequency ARray (LOFAR; 30-85 and 115-178MHz), Very Large
Array (VLA; 290-420MHz), Westerbork Synthesis Radio Telescope (WSRT;
609MHz) and Giant Metre Radio Telescope (GMRT; 615MHz) observations.
Description:
We present maps with LOFAR Low-Band Antenna (LBA) at 52MHz, LOFAR
High-Band Antenna (HBA) at 145MHz, VLA P-band at 360MHz, and GMRT at
615MHz. These maps are presented at their native resolution using
robust weighting. We also present LBA, HBA, and VLA maps at matched
(u,v) coverage between 0.04 and 4.9 klambda. For completeness, we
present again the WSRT map of Strom et al. (1983A&A...122..305S 1983A&A...122..305S) at
609MHz, at approximately matched (u,v) coverage. For the VLA, we
present one further map only from B- and C-configuration at 360MHz.
Objects:
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RA (2000) DE Designation(s)
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01 07 24.959 +32 24 45.21 3C 31 = NGC 383
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fluxdens.dat 67 36 3C 31 flux densities
list.dat 142 8 List of fits images
fits/* . 8 Individual fits images
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Byte-by-byte Description of file: fluxdens.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh [01] Right Ascension (J2000)
4- 5 I2 min RAm [07] Right Ascension (J2000)
7- 12 F6.3 s RAs [24.959] Right Ascension (J2000)
14 A1 --- DE- [+] Declination sign (J2000)
15- 16 I2 deg DEd [32] Declination (J2000)
18- 19 I2 arcmin DEm [24] Declination (J2000)
21- 25 F5.2 arcsec DEs [45.21] Declination (J2000)
27- 36 F10.7 deg RAdeg [16.8539946] Right Ascension (J2000)
38- 47 F10.7 deg DEdeg [32.4125594] Declination (J2000)
49- 52 A4 --- ID [3C31] Object identifier
54- 58 F5.1 MHz nu [33.9/608.5] Observing frequency
60- 63 F4.1 Jy Snu Integrated flux density
65- 67 F3.1 Jy e_Snu Error of the integrated flux density
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 23 I4 --- Nx Number of pixels along X-axis
25- 28 I4 --- Ny Number of pixels along Y-axis
30- 55 A26 --- Obs.date Observation date (YYYY-MM-DDThh:mm:ss.ssssss)
57- 64 F8.4 MHz Freq Observed frequency
66- 70 I5 Kibyte size Size of FITS file
72-104 A33 --- FileName Name of FITS file, in subdirectory fits
106-142 A37 --- Title Title of the FITS file
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Acknowledgements:
Volker Heesen, volker.heesen(at)hs.uni-hamburg.de
(End) Patricia Vannier [CDS] 26-Mar-2018