2015A&A...582A.123H

Query : 2015A&A...582A.123H

2015A&A...582A.123H - Astronomy and Astrophysics, volume 582A, 123-123 (2015/10-1)

The LOFAR Multifrequency Snapshot Sky Survey (MSSS). I. Survey description and first results.

HEALD G.H., PIZZO R.F., ORRU E., BRETON R.P., CARBONE D., FERRARI C., HARDCASTLE M.J., JURUSIK W., MACARIO G., MULCAHY D., RAFFERTY D., ASGEKAR A., BRENTJENS M., FALLOWS R.A., FRIESWIJK W., TORIBIO M.C., ADEBAHR B., ARTS M., BELL M.R., BONAFEDE A., BRAY J., BRODERICK J., CANTWELL T., CARROLL P., CENDES Y., CLARKE A.O., CROSTON J., DAIBOO S., DE GASPERIN F., GREGSON J., HARWOOD J., HASSALL T., HEESEN V., HORNEFFER A., VAN DER HORST A.J., IACOBELLI M., JELIC V., JONES D., KANT D., KOKOTANEKOV G., MARTIN P., McKEAN J.P., MORABITO L.K., NIKIEL-WROCZYNSKI B., OFFRINGA A., PANDEY V.N., PANDEY-POMMIER M., PIETKA M., PRATLEY L., RISELEY C., ROWLINSON A., SABATER J., SCAIFE A.M.M., SCHEERS L.H.A., SENDLINGER K., SHULEVSKI A., SIPIOR M., SOBEY C., STEWART A.J., STROE A., SWINBANK J., TASSE C., TRUESTEDT J., VARENIUS E., VAN VELZEN S., VILCHEZ N., VAN WEEREN R.J., WIJNHOLDS S., WILLIAMS W.L., DE BRUYN A.G., NIJBOER R., WISE M., ALEXOV A., ANDERSON J., AVRUCH I.M., BECK R., BELL M.E., VAN BEMMEL I., BENTUM M.J., BERNARDI G., BEST P., BREITLING F., BROUW W.N., BRUEGGEN M., BUTCHER H.R., CIARDI B., CONWAY J.E., DE GEUS E., DE JONG A., DE VOS M., DELLER A., DETTMAR R.-J., DUSCHA S., EISLOEFFEL J., ENGELS D., FALCKE H., FENDER R., GARRETT M.A., GRIESSMEIER J., GUNST A.W., HAMAKER J.P., HESSELS J.W.T., HOEFT M., HOERANDEL J., HOLTIES H.A., INTEMA H., JACKSON N.J., JUETTE E., KARASTERGIOU A., KLIJN W.F.A., KONDRATIEV V.I., KOOPMANS L.V.E., KUNIYOSHI M., KUPER G., LAW C., VAN LEEUWEN J., LOOSE M., MAAT P., MARKOFF S., McFADDEN R., McKAY-BUKOWSKI D., MEVIUS M., MILLER-JONES J.C.A., MORGANTI R., MUNK H., NELLES A., NOORDAM J.E., NORDEN M.J., PAAS H., POLATIDIS A.G., REICH W., RENTING A., ROETTGERING H., SCHOENMAKERS A., SCHWARZ D., SLUMAN J., SMIRNOV O., STAPPERS B.W., STEINMETZ M., TAGGER M., TANG Y., TER VEEN S., THOUDAM S., VERMEULEN R., VOCKS C., VOGT C., WIJERS R.A.M.J., WUCKNITZ O., YATAWATTA S. and ZARKA P.

Abstract (from CDS):

We present the Multifrequency Snapshot Sky Survey (MSSS), the first northern-sky Low Frequency Array (LOFAR) imaging survey. In this introductory paper, we first describe in detail the motivation and design of the survey. Compared to previous radio surveys, MSSS is exceptional due to its intrinsic multifrequency nature providing information about the spectral properties of the detected sources over more than two octaves (from 30 to 160MHz). The broadband frequency coverage, together with the fast survey speed generated by LOFAR's multibeaming capabilities, make MSSS the first survey of the sort anticipated to be carried out with the forthcoming Square Kilometre Array (SKA). Two of the sixteen frequency bands included in the survey were chosen to exactly overlap the frequency coverage of large-area Very Large Array (VLA) and Giant Metrewave Radio Telescope (GMRT) surveys at 74MHz and 151MHz respectively. The survey performance is illustrated within the MSSS Verification Field (MVF), a region of 100 square degrees centered at (α,δ)_J2000=(15^h,69°). The MSSS results from the MVF are compared with previous radio survey catalogs. We assess the flux and astrometric uncertainties in the catalog, as well as the completeness and reliability considering our source finding strategy. We determine the 90% completeness levels within the MVF to be 100mJy at 135MHz with 108" resolution, and 550mJy at 50MHz with 166" resolution. Images and catalogs for the full survey, expected to contain 150000-200000 sources, will be released to a public web server. We outline the plans for the ongoing production of the final survey products, and the ultimate public release of images and source catalogs.

Abstract Copyright: ∼

Journal keyword(s): surveys - radio continuum: general

Simbad objects: 14

Full paper

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Number of rows : 14

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	3C 48	QSO	01 37 41.2996631208	+33 09 35.080388820		16.62	16.20			~	2765	2
2	PSR J0218+42	Psr	02 18 06.3604	+42 32 17.365						~	325	2
3	4C 37.10	Rad	04 00 45.8	+37 47 15						~	3	2
4	3C 111	Sy1	04 18 21.2772425736	+38 01 35.801359968		19.75	18.05			~	929	1
5	4C 39.13	Rad	04 23 46.5	+40 04 09						~	6	1
6	M 1	SNR	05 34 30.9	+22 00 53						~	6092	1
7	ICRF J054236.1+495107	Sy1	05 42 36.13789710	+49 51 07.2337139		18.45	17.80	17.210		~	1449	1
8	3C 196	Sy1	08 13 36.0561170112	+48 13 02.644966020		18.36	17.79			~	545	2
9	M 87	AGN	12 30 49.42338414	+12 23 28.0436859	10.16	9.59	8.63		7.49	~	7018	3
10	3C 286	Sy1	13 31 08.2883506368	+30 30 32.960091564		17.51	17.25			~	4251	2
11	3C 295	Sy2	14 11 20.6	+52 12 09		22.34	20.80	18.54		~	968	5
12	ICRF J182931.7+484446	Sy1	18 29 31.7809732968	+48 44 46.160168892		17.05	16.81	16.860		~	676	1
13	NAME Cyg A	Sy2	19 59 28.35656837	+40 44 02.0972325		16.22	15.10			~	2319	2
14	NAME Cas A	SNR	23 23 24.000	+58 48 54.00			14.30			~	2724	1

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