VIII/98 180MHz Murchison Commissioning Survey (MWACS) (Hurley-Walker+, 2014)
The Murchison Widefield Array Commissioning Survey - MWACS.
Hurley-Walker N., Morgan J., Wayth R.B., Hancock P.J., Bell M.E.,
Bernardi G., Bhat N.D.R., Briggs F., Deshpande A.A., Ewall-Wice A.,
Feng L., Hazelton B.J., Hindson L., Jacobs D.C., Kaplan D.L.,
Kudryavtseva N., Lenc E., McKinley B., Mitchell D., Pindor B., Procopio P.,
Oberoi D., Offringa A., Ord S., Riding J., Bowman J.D., Cappallo R.,
Corey B., Emrich D., Gaensler B.M., Goeke R., Greenhill L., Hewitt J.,
Johnston-Hollitt M., Kasper J., Kratzenberg E., Lonsdale C., Lynch M.,
McWhirter R., Morales M.F., Morgan E., Prabu T., Rogers A., Roshi A.,
Shankar U., Srivani K., Subrahmanyan R., Tingay S., Waterson M., Webster R.,
Whitney A., Williams A., Williams C.
<Publ. Astron. Soc. Australia , 31, 45 (2014)>
=2014PASA...31...45H 2014PASA...31...45H
ADC_Keywords: Surveys ; Galaxies, radio ; Positional data ; Radio continuum ;
Radio sources
Keywords: radio continuum: general - surveys - techniques: interferometric
Description:
The Murchison Widefield Array Commissioning Survey (MWACS) is a
∼6100deg2 104-196MHz radio sky survey performed with the
Murchison Widefield Array during instrument commissioning between 2012
September and 2012 December. The data were taken as meridian drift
scans with two different 32-antenna sub-arrays that were available
during the commissioning period. The data were combined in the
visibility plane before being imaged, and then mosaicked. The survey
covers approximately 20.5h<RA<8.5h, -58°<Dec←14° over three
frequency bands centred on 119, 150 and 180MHz. The survey has 3arcmin
angular resolution and a typical noise level of 40mJy/beam, with
reduced sensitivity near the field boundaries and bright sources. The
catalogue consists of flux density and spectral index measurements for
14,110 sources, extracted from the mosaics, 1,247 of which are
sub-components of complexes of sources.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
mwacs.dat 242 14110 MWACS catalogue Release Candidate 2 (2014/09/26)
All sources
mwacs.vot 136 338726 VOTable version of the catalog
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Byte-by-byte Description of file: mwacs.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [MWACS]
7- 18 A12 --- MWACS Source Name, JHHMM.m+DDMM
20- 33 F14.10 deg RAdeg Right ascension (J2000) (RAJ2000)
35- 44 F10.8 arcmin e_RAdeg [0.33/1.4] rms uncertainty on RAdeg (e_RAJ2000)
46- 56 F11.7 deg DEdeg [-59/-14] Declination (J2000) (DEJ2000)
58- 67 F10.8 arcmin e_DEdeg [0.32/1.3] rms uncertainty on DEdeg (e_DEJ2000)
69- 79 F11.8 Jy S180 [0.1/68] Fitted flux at 180MHz
81- 91 F11.9 Jy e_S180 [0.02/8] rms uncertainty on S180
93-104 E12.9 --- SpInd [-9/5] Spectral index α where
Sν∝να (SpIndex)
106-115 F10.8 --- e_SpInd Error on Spectral index (e_SpIndex)
117-126 F10.7 arcmin Maj Fitted Major Axis of source at 180MHz (MajAxis)
128-137 F10.8 arcmin e_Maj rms uncertainty on Maj (e_MajAxis)
139-147 F9.7 arcmin Min Fitted Minor Axis of source at 180MHz (MinAxis)
149-159 F11.9 arcmin e_Min rms uncertainty on Min (e_MinAxis)
161-172 F12.8 deg PA [-90/90]?=- Fitted Position Angle of source
at 180MHz
174-183 F10.7 deg e_PA ?=- rms uncertainty on PA
185-193 F9.7 arcmin bMaj Major Axis of beam@180MHz (MajAxisB)
195-203 F9.7 arcmin bMin Minor Axis of beam@180MHz (MinAxisB)
205-214 F10.6 deg PAB [-90/90] Position Angle of beam@180MHz (PAB)
216-226 I11 --- ID.N ?=-2147483648 ID within Northern Field (IDC102)
228-233 I6 --- ID.S ?=-32768 ID within Southern Field (IDC103)
235-240 I6 --- cmp [1/3]?=-32768 Sub-component index for
sources in multi-component fit (CompID)
242 I1 --- Fit [0/2] Type of fit used, 0=gaussian (1)
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Note (1): Type of fit used:
0 = gaussian fit at all frequencies
1 = flood-fill
2 = forced measurement
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Acknowledgements:
Natasha Hurley-Walker, nhurleywalker(at)cantab.net
History:
* 01-Dec-2014: On-line version (as J/other/PASA/31.45)
* 08-Dec-2014: Corrected version, from author
* 10-Dec-2014: e_RAdeg and DEdeg were inverted in the previous description
(now corrected)
* 20-Dec-2014: Catalog also named VIII/98
(End) Natasha Hurley-Walker [Curtin Univ.], Patricia Vannier [CDS] 17-Oct-2014