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J/A+AS/127/119 Radio continuum study of the MC (Filipovic+, 1998)
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A radio continuum study of the Magellanic Clouds. VI. Discrete sources common to
radio and X-ray surveys of the Magellanic Clouds.
Filipovic M.D., Pietsch W., Haynes R.F., White G.L., Jones P.A.,
Wielebinski R., Klein U., Dennerl K., Kahabka P., Lazendic J.S.
<Astron. Astrophys. Suppl. Ser. 127, 119 (1998)>
=1998A&AS..127..119F (SIMBAD/NED BibCode)
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ADC_Keywords: Magellanic Clouds ; Radio sources ; X-ray sources
Keywords: galaxies: Magellanic Clouds - radio continuum: galaxies -
X-rays: galaxies - ISM: supernova remnants (SNRs) - ISM: HII regions
Abstract:
By comparing Parkes telescope radio surveys with the X-ray ROSAT
All-Sky Survey (RASS) we have found 71 discrete sources of both radio
and X-ray emission in the Large Magellanic Cloud (LMC). These 71
sources are mainly supernova remnants (SNRs) and SNR candidates (36),
and background sources (27). For six of the sources we have no
proposed identification and the other two are HII regions. A
source-intensity comparison of the radio and X-ray sources shows very
little correlation, but we note that the strongest SNRs at both radio
and X-ray frequencies are young SNRs from Population I. Six new LMC
SNR candidates are proposed. From the radio flux density of the SNRs
we have estimated the SNR birth rate to be one every 100 (+/-20) yr
and the star-formation rate (SFR) to be 0.7 (+/-0.2)M_{sun}_/yr. A
similar comparison was undertaken for the Small Magellanic Cloud
(SMC), but instead of the RASS we used a roster of pointed
observations made with the ROSAT Position Sensitive Proportional
Counter (PSPC). This comparison resulted in 27 sources in common
between the Parkes radio and ROSAT PSPC surveys. Two new SMC sources
are proposed for SNR candidates. The SMC SNR birth rate was estimated
to be one every 350 (+/-70)yr and the SFR was estimated to be
0.15 (+/-0.05)M_{sun}_/yr.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 98 71 Catalogue of the LMC radio sources identified
in the RASS
table2b.dat 255 71 LMC cross-identifications
table3.dat 97 27 Catalogue of the SMC radio sources identified
in the ROSAT PSPC (Cat. <IX/11>)
table3b.dat 189 27 SMC cross-identifications
refs.dat 199 74 References for table2.dat and table3.dat
tables.tex 166 501 LaTeX version of the tables
tables.ps 72 865 Post-Script version of the tables
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)
IX/11 : ROSAT PSPC Source Catalog (Voges+ 1994)
J/A+AS/111/311 : Radio continuum study of the MC (Filipovic+, 1995)
J/A+AS/120/77 : Radio continuum study of the MC (Filipovic+, 1996)
J/A+AS/121/321 : SMC catalogue of radiosources (Filipovic+ 1997)
Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number
4- 16 A13 --- RadioName Radio source name
18- 31 A14 --- X-rayName X-ray source name (1)
33- 39 F7.4 Jy S4.75GHz ? Radio flux density at 4.75 GHz for LMC
and 4.85GHz for SMC
40 A1 --- n_S4.75GHz [f] f: flux density estimated by interpolation
from other radio frequencies
42- 48 F7.2 ct/ks CR Count Rate
50- 54 F5.2 --- alpha ? Source radio spectral index (2)
56- 59 F4.2 --- e_alpha ? Error in alpha
61- 65 F5.2 --- HR2 Hardness ratio HR2
67- 70 A4 --- Type Radio type source (3)
72- 98 A27 --- r_Seq References detailed in file refs.dat
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Note (1): The X-ray source name is taken from Pietsch et al. (in prep.)
in table2.dat and from Kahabka et al. (in prep.) in table3.dat.
More details are given in Sect. 3.
Note (2): In order to extend the radio frequency coverage and to obtain more
accurate radio spectral indices we have also used some flux densities
from other radio catalogues; Clarke et al. (1976AuJPS..40....1C)
at 0.408GHz, Mills et al. (1984AuJPh..37..321M) at 0.843GHz and
Milne et al. (1980MNRAS.191..469M) at 14.7GHz.
Spectral indices are not given for 10 LMC and six SMC sources which
were detected at only one radio frequency or for which radio data are
only available at two close frequencies (4.75GHz and 4.85GHz).
Note (3): BG, bg: background sources
Hii : H II regions
SNR, snr : Supernova remnant
SNR1: evolved SNRs
SNR2: Oxygen-rich SNRs
SNR3: Balmer-dominated SNRs
SNR4: Crab-like SNRs
SNR5: possible type III SNRs
Capitals (BG, SNR and Hii) were used for classifications from previous
works and lower case (bg and snr) for sources classified here
The question-mark indicates probable but not certain classification.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference number
4-199 A196 --- Text Text of Reference
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Byte-by-byte Description of file: table2b.dat table3b.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number
4-137 A134 --- Names Other names
139-255 A117 --- Com Comments (1)
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Note (1): Abreviations used:
N H{alpha} catalogue of emission nebulae (Henize, 1955ApJS....2..315H)
MC Radio catalogue (5.00 GHz) (McGee et al., 1972AuJPh..25..581M)
MC4 Radio catalogue (0.408 GHz) (Clarke et al., 1976MNRAS.174..393C)
DEM L H{alpha} catalogue of emission nebulae
(Davies et al., 1976MmRAS..81...89D)
DEM S H{alpha} catalogue of emission nebulae
(Davies et al., 1976MmRAS..81...89D)
NGC NGC 2000 catalogue (optical) (Sinnott, 1988, Cat. <VII/118>)
LHG Einstein X-ray catalogue (Long et al., 1981ApJ...248..925L)
W Einstein X-ray catalogue (Wang et al., 1991ApJ...374..475W)
PSR Catalogue of pulsars (Taylor et al., 1993, Cat. <VII/156>)
PMN Radio catalogue (4.85 GHz) (Wright et al., 1994, Cat. <VIII/38>)
PKS PKSCAT-90 radio catalogue (Otrupcek & Wright, 1991PASAu...9..170O)
Sa Catalogue of planetary nebula (Sanduleak et al., 1978PASP...90..621S;
Sanduleak, 1984IAUS..108..231S)
CO Catalogue of CO molecular clouds (Cohen et al., 1988ApJ...331L..95C)
IJL Catalogue of CO molecular clouds
(Israel et al., 1993, Cat. <J/A/A/276/25>)
LH Catalogue of stellar associations (Lucke & Hodge, 1970AJ.....75..171L)
S Radio catalogue (McGee et al., 1976AuJPh..29..329M)
MRC Radio catalogue (408 MHz) (Large et al., 1981, Cat. <VIII/16>)
E X-ray catalogue (Seward & Mitchell, 1981ApJ...243..736S)
IKT X-ray catalogue (Inoue et al., 1983IAUS..101..535I)
LI-SMC IR catalogue (Schwering & Israel, 1991A&A...246..231S;
Israel et al., 1993, Cat. <J/A/A/276/25>)
WW X-ray catalogue (Wang & Wu, 1992ApJS...78..391W)
BKGS X-ray catalogue (Bruhweiler et al., 1987ApJ...317..152B)
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Acknowledgements: Miroslav Filipovic <fica@mpe.mpg.de>
References:
Haynes et al., Paper I. 1991A&A...252..475H
Xu et al., Paper II. 1992A&A...257...47X
Kelin et al., Paper III. 1993A&A...271..402K
Filipovic et al., Paper IV. 1995A&AS..111..311F, Cat. <J/A+AS/111/311>
Filipovic et al., Paper IVa. 1996A&AS..120...77F, Cat. <J/A+AS/120/77>
Filipovic et al., Paper V. 1997A&AS..121..321F, Cat. <J/A+AS/121/321>
Filipovic et al., Paper VI. 1998A&AS..127..119F
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(End) Patricia Bauer [CDS] 19-Feb-1998