J/MNRAS/507/2885 Radio continuum sources behind LMC (Filipovic+, 2021)
Radio continuum sources behind the Large Magellanic Cloud.
Filipovic M.D., Bojicic I.S., Grieve K.R., Norris R.P., Tothill N.F.H.,
Shobhana D., Rudnick L., Prandoni I., Andernach H., Hurley-Walker N.,
Alsaberi R.Z.E., Anderson C.S., Collier J.D., Crawford E.J., For B.-Q.,
Galvin T.J., Haberl F., Hopkins A.M., Ingallinera A., Kavanagh P.J.,
Koribalski B.S., Kothes R., Leahy D., Leverenz H., Maggi P., Maitra C.,
Marvil J., Pannuti T.G., Park L.A.F., Payne J.L., Pennock C.M., Riggi S.,
Rowell G., Sano H., Sasaki M., Staveley-Smith L., Trigilio C., Umana G.,
Urosevic D., Van Loon J.T., Vardoulaki E.
<Mon. Not. R. Astron. Soc., 507, 2885-2904 (2021)>
=2021MNRAS.507.2885F 2021MNRAS.507.2885F (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Radio continuum
Keywords: catalogues - galaxies: active - Magellanic Clouds -
radio continuum: general
Abstract:
We present a comprehensive multifrequency catalogue of radio sources
behind the Large Magellanic Cloud (LMC) between 0.2 and 20GHz,
gathered from a combination of new and legacy radio continuum surveys.
This catalogue covers an area of ∼144deg2 at angular resolutions
from 45 arcsec to ∼3 arcmin. We find 6434 discrete radio sources
in total, of which 3789 are detected at two or more radio frequencies.
We estimate the median spectral index (α; where
Sv~να) of α=-0.89 and mean of -0.88±0.48 for 3636
sources detected exclusively at two frequencies (0.843 and 1.384GHz)
with similar resolution [full width at half-maximum (FWHM) ∼40-45
arcsec]. The large frequency range of the surveys makes it an
effective tool to investigate Gigahertz Peak Spectrum (GPS), Compact
Steep Spectrum (CSS), and Infrared Faint Radio Source (IFRS)
populations within our sample. We find 10 GPS candidates with peak
frequencies near 5GHz, from which we estimate their linear size. 1866
sources from our catalogue are CSS candidates with α←0.8. We
found six candidates for High Frequency Peaker (HFP) sources, whose
radio fluxes peak above 5GHz and no sources with unconstrained peaks
and α>0.5. We found optical counterparts for 343 of the radio
continuum sources, of which 128 have a redshift measurement. Finally,
we investigate the population of 123 IFRSs found in this study.
Description:
Point source catalogue of 6434 objects in the directions of the LMC
with its positions, integrated flux densities with associated
uncertainty and spectral index. Upper limits and uncertain values in
flux densities flag columns are designated with preceding < and colon
(:), respectively.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 179 6434 Point source catalogue in the directions of
the LMC
table4.dat 56 1995 Source list at 0.843 GHz derived from
ASKAP-Beta survey
table5.dat 56 2084 source list at 0.843 GHz derived from MOST
table6.dat 40 343 Sources from our base catalogue cross-matched
with six optical surveys used in this study
table7.dat 69 128 Properties of IFRSs studied here
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See also:
VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)
VIII/81 : Sydney University Molonglo Sky Survey (SUMSS V2.1)
(Mauch+ 2008)
J/ApJ/747/107 : QSO Candidates in the MACHO LMC database (Kim+, 2012)
J/ApJ/701/508 : 5000 AGNs behind the Magellanic clouds (Kozlowski+, 2009)
J/ApJ/746/27 : Magellanic Quasars Survey. II. AGNs behind LMC
(Kozlowski+, 2012)
J/ApJ/775/92 : MQS III: AGNs behind LMC and SMC (Kozlowski+, 2013)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Source name (HHMMSS+DDMMSS)
15- 16 I2 h RAh Right ascension (J2000)
18- 19 I2 min RAm Right ascension (J2000)
21- 24 F4.1 s RAs Right ascension (J2000)
26 A1 --- DE- Delclination sign (J2000)
27- 28 I2 deg DEd Delclination (J2000)
30- 31 I2 arcmin DEm Delclination (J2000)
33- 34 I2 arcsec DEs Delclination (J2000)
36 A1 --- l_FGLEAM Upper limit flag on GLEAM 200MHz flux density
38- 41 I4 mJy FGLEAM ?=- Flux density at 200MHz
(Hurley-Walker in prep.)
43- 45 I3 mJy e_FGLEAM ?=- Uncertainty in flux density at 200MHz
47- 52 F6.1 mJy FSUMSS ?=- Flux density at 843MHz
(Mauch et al., 2008, Cat. VIII/81)
54- 57 F4.1 mJy e_FSUMSS ?=- Uncertainty in flux density at 843MHz
59 A1 --- u_FATCA-20cm [:] Uncertainty flag on ATCA 1384MHz
flux density
61- 67 F7.2 mJy FATCA-20cm Flux density at 1384MHz
69- 74 F6.2 mJy e_FATCA-20cm Uncertainty in flux density at 1384MHz
76- 80 F5.1 mJy FATCA-6cm ?=- Flux density at 4800MHz
82- 86 F5.2 mJy e_FATCA-6cm ?=- Uncertainty in flux density at 4800MHz
88- 96 F9.5 mJy FATCA-3cm ?=- Flux density at 8640MHz
98-102 F5.2 mJy e_FATCA-3cm ?=- Uncertainty in flux density at 8640MHz
104-107 I4 mJy FMRC ?=- Flux density at 408MHz (Large et al.,
1981MNRAS.194..693L 1981MNRAS.194..693L, Cat. VIII/16)
109-111 I3 mJy e_FMRC ?=- Uncertainty in flux density at 408MHz
113-117 F5.1 mJy FPMN ?=- Flux density 4850MHz (Griffith and
Wright, 1993AJ....105.1666G 1993AJ....105.1666G, Cat. VIII/38)
119-122 F4.1 mJy e_FPMN ?=- Uncertainty in flux density 4850MHz
124-128 F5.1 mJy FAT20G-6cm ?=- Flux density at 4850MHz (Murphy et al.,
2010, Cat. J/MNRAS/402/2403
130-133 F4.1 mJy e_FAT20G-6cm ?=- Uncertainty in flux density at 4850MHz
135-139 F5.1 mJy FAT20G-3cm ?=- Flux density at 8640MHz (Murphy et al.,
2010, Cat. J/MNRAS/402/2403
141-144 F4.1 mJy e_FAT20G-3cm ?=- Uncertainty in flux density at 8640MHz
146-150 F5.1 mJy FAT20G-2cm ?=- Flux density at 19GHz (Murphy et al.,
2010, Cat. J/MNRAS/402/2403
152-155 F4.1 mJy e_FAT20G-2cm ?=- Uncertainty in flux density at 19GHz
157-163 F7.4 --- alpha ?=- Spectral Index
165-170 F6.4 --- e_alpha ?=- Uncertainty in spectral Index
172-173 I2 --- o_alpha ?=- Number of points used for spectral index
fit
175-179 A5 --- Class Proposed class of the object,
BLLac, FSRQ, GPS, HFP or IFRSs
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Byte-by-byte Description of file: table4.dat table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- No Sequential number within the table
6- 7 I2 h RAh Right ascension (J2000)
9- 10 I2 min RAm Right ascension (J2000)
12- 15 F4.1 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 25 I2 arcsec DEs Declination (J2000)
27- 32 F6.1 mJy/beam Fp843MHz Peak flux at 0.843GHz
34- 37 F4.1 mJy/beam e_Fp843MHz ?=- Uncertainty in peak flux at 0.843GHz
39- 45 F7.2 mJy S843MHz Flux density at 0.843GHz
46- 51 F6.2 mJy e_S843MHz ?=- Uncertainty in flux density at 0.843GHz
53- 56 F4.2 mJy/beam rms Local rms
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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- 13 A13 --- Name Source name (HHMMSS+DDMMSS)
15- 21 F7.5 --- z1 ?=- First redshift
22 A1 --- --- [;]
23- 29 F7.5 --- z2 ? Second redshift
30 I1 --- r_z1 ?=- Reference for z1 (1)
31 A1 --- --- [;]
32 I1 --- r_z2 ? Reference for z2 (1)
34- 40 A7 --- rdet Detections references (1)
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Note (1): References as follows:
1 = 6dF: Jones et al. (2009MNRAS.399..683J 2009MNRAS.399..683J, Cat. VII/259)
2 = MACHO: Kim et al. (2012ApJ...747..107K 2012ApJ...747..107K, Cat. J/ApJ/747/107)
3 = MQS I: Kozlowski & Kochanek (2009ApJ...701..508K 2009ApJ...701..508K, Cat. J/ApJ/701/508)
4 = MQS II: Kozlowski et al. (2012ApJ...746...27K 2012ApJ...746...27K, Cat. J/ApJ/746/27)
5 = MQS III: Kozlowski et al. (2013ApJ...775...92K 2013ApJ...775...92K, Cat. J/ApJ/775/92)
6 = MCELS: Smith & MCELS Team (1998PASA...15..163S 1998PASA...15..163S)
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name ATCA name (HHMMSS+DDMMSS)
15- 33 A19 --- IRName IR source ID (JHHMMSS.ss+DDMMSS.s)
35- 40 F6.2 mJy S1.4GHz Flux density at 1.4GHz
43- 48 F6.2 mJy S843MHz ?=- Flux density at 843MHz
51- 54 F4.1 uJy S3.6um Flux density at 3.6um (SAGE)
or 3.4um (CatWISE2000)
56- 61 F6.3 --- alpha ?=- Spectral index
63- 69 A7 --- r_S3.6um Reference catalogue for S3.6um
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History:
From Ivan Bojicic, I.Bojicic(at)westernsydney.edu.au
Acknowledgements:
The Australian SKA Pathfinder is part of the Australia Telescope
National Facility which is managed by Australian Commonwealth
Scientific and Industrial Research Organisation (CSIRO). Operation of
ASKAP is funded by the Australian Government with support from the
National Collaborative Research Infrastructure Strategy. ASKAP uses
the resources of the Pawsey Supercomputing Centre. Establishment of
ASKAP, the Murchison Radio-astronomy Observatory and the Pawsey
Supercomputing Centre are initiatives of the Australian Government,
with support from the Government of Western Australia and the Science
and Industry Endowment Fund. We acknowledge the Wajarri Yamatji people
as the traditional owners of the Observatory site. This work was
supported by resources provided by the Pawsey Supercomputing Centre
with funding from the Australian Government and the Government of
Western Australia. This paper includes archived data obtained through
the Australia Telescope Online Archive (http://atoa.atnf.csiro.au).
Parts of this research were conducted with the support of Australian
Research Council Centre of Excellence for AllSky Astrophysics in 3
Dimensions (ASTRO 3D), through project number CE170100013. IP
acknowledges support from INAF under the SKA/CTA PRIN 'FORECaST'
and the PRIN MAIN STREAM 'SAuROS' projects. H.A. has benefited
from grant CIIC 174/2021 of Universidad de Guanajuato, Mexico. D.U.
acknowledges Ministry of Education, Science and Technological
Development of the Republic of Serbia through the contract No.
4451-03-9/2021-14/200104.
References:
Mauch et al., 2003MNRAS.342.1117M 2003MNRAS.342.1117M, Cat. VIII/70
Large et al., 1981MNRAS.194..693L 1981MNRAS.194..693L, Cat. VIII/16
Murphy et al., 2010MNRAS.402.2403M 2010MNRAS.402.2403M, Cat. J/MNRAS/402/2403
(End) Patricia Vannier [CDS] 03-Feb-2022