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SMCRADIO - Small Magellanic Cloud ATCA Radio Continuum Sources

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Overview

This table contains the classification of 717 radio-continuum sources from the Australia Telescope Compact Array (ATCA) Catalog of the Small Magellanic Cloud (SMC). All 717 sources have been categorised into one of three groups: supernova remnants (SNRs), HII regions and background sources. In total, 71 sources are named as HII regions (or candidates) and 21 sources are named as SNRs (or candidates). Six sources are named as either HII regions or background sources and two are candidate radio planetary nebulae. One source is coincident with an X-ray binary. 616 objects are classified as background sources and their statistics are presented in the published paper II from which this table is taken.

Catalog Bibcode

2004MNRAS.355...44P

References

An ATCA radio-continuum study of the Small Magellanic Cloud.
II. Source identification and classification.
    Payne J.L., Filipovic M.D., Reid W., Jones P.A., Staveley-Smith L.,
    White G.L.
    <Mon. Not. R. Astron. Soc. 355, 44 (2004)>
    =2004MNRAS.355...44P        (SIMBAD/NED BibCode)
I.  Source Catalogues at 1.42, 2.37, 4.80 and 8.64 GHz.
    Filipovic M.D., Bohlsen, T., Reid W., Staveley-Smith L., Jones, P.A.,
    Nohejl, N., Goldstein, G.
    <Mon. Not. R. Astron. Soc. 335, 1085 (2002)>
    =2002MNRAS.335.1085F        (SIMBAD/NED BibCode)

Provenance

This table was created by the HEASARC in March 2005 based on CDS table J/MNRAS/355/44/table2.dat .

HEASARC Implementation

(1) The HEASARC has converted all radio flux densities from Janskies (Jy) to milliJanskies (mJy). (2) The HEASARC has used the prefix of ATCA for the source names as suggested in the published paper II. The CDS documentation for this table suggests an alternative naming scheme using the prefix [FBR2002] which is the recommended prefix for sources based on Paper I of the Catalog. (3) The original catalog table used lower case characters for the source types and old types of candidate H II regions ('hii'), candidate supernovae remnants ('snr') and candidate background objects ('bkg') (as opposed to upper case letters for confirmed objects in these classes). The HEASARC has translated these source types for candidate objects to 'HII?', 'SNR?' and 'BKG?', respectively. (4) The HEASARC has converted the X-ray luminosities into their corresponding logarithmic values.

Parameters

Sequence_Number
The ATCA source number, a sequence number in order of increasing J2000 RA.

Group_Name
The group name (HHMM-DDMM) to which the source belongs, for sources which were separate, individually defined sources at one frequency, but were linked at a lower frequency.

Name
The ATCA name based on the J2000 position of the source (JHHMMSS-DDMMSS) and the prefix 'ATCA '. The CDS documentation suggests an alternative naming scheme using the prefix '[FBR2002] ' which is the recommended prefix for sources based on Paper I of the Catalog.

RA
The Right Ascension of the radio source. This was given in J2000 coordinates and to a precision of 0.01 seconds of time in the published papaer and CDS table.

Dec
The Declination of the radio source. This was given in J2000 coordinates and to a precision of 0.1 arcseconds in the published papaer and CDS table.

LII
The Galactic Longitude of the radio source.

BII
The Galactic Latitude of the radio source.

Flux_408_MHz
The 408 MHz integrated flux density of the radio source, in mJy, taken from the MC4 (Clarke, Little & Mills 1976, AuJPA, 40, 1) Catalog.

Flux1_843_MHz
The 843 MHz integrated flux density of the radio source, in mJy, taken from the SUMSS (Bock, Large & Sadler 1999, AJ, 117, 1578) Catalog.

Flux2_843_MHz
The 843 MHz integrated flux density of the radio source, in mJy, taken from the MOST (Ye 1988, PhD thesis) Catalog.

Flux_1420_MHz
The 1.42 GHz integrated flux density of the radio source, in mJy, measured by the ATCA (this work).

Flux_2370_MHz
The 2.37 GHz integrated flux density of the radio source, in mJy, measured by the ATCA (this work).

Flux_4800_MHz
The 4.8 GHz integrated flux density of the radio source, in mJy, measured by the ATCA (this work).

Flux_8640_MHz
The 8.64 GHz integrated flux density of the radio source, in mJy, measured by the ATCA (this work).

Log_Lx
The logarithm of the 0.1 - 4 keV X-ray luminosity of the X-ray counterpart to the radio source, in erg/s.

Spect_Index
The spectral index alpha of the radio source, defined by the relation S_nu ~ nu^alpha, where S_nu is the integrated flux density and nu is the frequency. The authors employed a standard line of best-fitting algorithm to determine the spectral index and the standard error for each source. 96 sources had only one flux density available, and hence no spectral indices could be calculated for these sources.

Spect_Index_Error
The standard error in the radio spectral index.

Est_Flux_1000_MHz
The estimated flux density of the radio source at 1 GHz, based on the spectral index.

Old_Type
The source type of the radio source based on past work, using the following codes:

             code: meaning

              BKG : confirmed background object
              BKG?: suspected background object
              SNR : confirmed supernova remnant
              SNR?: suspected supernova remnant
              HII : confirmed HII region
              HII?: suspected HII region
              B/H : background object or HII region; see Paper for details
              PN  : planetary nebula
              XRB : X-ray binary
  

Source_Type
The source type of the radio source based on the present work (see section 2.3 of paper II for a discussion of the criteria used for this source classification), using the following codes:

             code: meaning

              BKG : confirmed background object
              BKG?: suspected background object
              SNR : confirmed supernova remnant
              SNR?: suspected supernova remnant
              HII : confirmed HII region
              HII?: suspected HII region
              B/H : background object or HII region; see Paper for details
              PN  : planetary nebula
              XRB : X-ray binary
  

Alt_Names
Names of cross-identified sources listed in previous catalogs. Abbreviations of catalogue names are as follows:

             N       : 1956ApJS....2..315H Henize, LHA 115-N
             Nail    : 1953PNAS...39.1168M McKibben et al.
             DEM S   : 1976MmRAS..81...89D Davies et al.
             JD      : 2002AJ....123..269J Jacoby & de Marco, [JD2002] NN
             M (MA)  : 1995A&AS..112..445M Morgan, [M95] N
             NGC (IC): 1988, Cat. <VII/118>, Dreyer,
             H&S     : 1975AJ.....80....9H Hodge & Snow
             LI-SMC  : 1990, Cat. <II/181>, Schwering & Israel
             PKS     : 1991PASAu...9..170O Otrupcek & Wright, Cat. <VIII/15>
             SMC     : 1997A&AS..121..321F Filipovic et al., Cat. <J/A+AS/121/321>
             MOST    : 1988, Ye T., PhD Thesis Sydney University
             SUMSS   : 1999AJ....117.1578B Bock et al.
             PMN     : 1994ApJS...91..111W Wright et al., Cat. <VIII/38>
             S       : 1976AuJPh..29..329M McGee et al.
             MC4     : 1976AuJPA..40....1C Clarke et al.
             MRC     : 1981MNRAS.194..693L Large et al., Cat. <VIII/16>
             IJL     : 1993A&A...276...25I Israel et al., Cat. <J/A+A/276/25>
             1E      : 1981ApJ...243..736S Seward & Mitchell
             IKT     : 1983IAUS..101..535I Inoue et al.
             WW      : 1992ApJS...78..391W Wang & Wu
             BKGS    : 1987ApJ...317..152B Bruhweiler et al.
             RX-J    : 1999A&AS..136...81K Kahabka et al., Cat. <J/A+AS/136/81>
             RX-J_2  : 2000A&AS..142...41H Harbel et al., Cat. <J/A+AS/142/41>
             HRI     : 2000A&AS..147...75S Sasaki et al., Cat. <J/A+AS/147/75>
             MCRX    : 2001AJ....122..849D Dickel et al.
             YIT     : 1991MNRAS.249..722Y Ye et al.
             SNR SMC : Known SNRs in the SMC
  

Comments
Comments from other catalogs. The somments are very general and not in any particular order. They are self-explanatory; capital letters usually denote higher confidence.

Class
The HEASARC Browse object classification, based on the value of the source_type parameter.


Contact Person

Questions regarding the SMCRADIO database table can be addressed to the HEASARC User Hotline.

Page Author: Browse Software Development Team
Last Modified: 6-Apr-2005