Central Bureau for Astronomical Telegrams
IAUC 7432: 2000cl; ROSAT ALL-SKY SURVEY FAINT SOURCE CATALOGUE
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Circular No. 7432
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)
SUPERNOVA 2000cl IN NGC 3318
Robin Chassagne, Ste. Clotilde, Ile de Reunion, reports the
discovery of an apparent supernova (mag 14.8) on two unfiltered CCD
images (limiting mag 20) taken with a 0.305-m telescope on May
26.666 and 27.729 UT. SN 2000cl is located at R.A. = 10h37m16s.07,
Decl. = -41o37'47".8 (equinox 2000.0), which is 6" east and 7"
south of the center of NGC 3318. Nothing appears at this location
on an image obtained by Chassagne on 2000 Feb. 2 (limiting mag 20)
or on a U.K. Schmidt (Digital Sky Survey) image taken on 1980 Jan.
24 (limiting mag about 22).
A. Maury, Observatoire de la Cote d'Azur, writes: "L. Vanzi,
L. Testi, C. Lidman, and I obtained a fully reduced 30-min spectrum
of SN 2000cl with the 1.5-m Danish telescope (+ DFOSC) at the
European Southern Observatory on May 27 UT. The spectrum shows the
typical features of a type-II supernova: broad H-alpha, H-beta,
and He I at 587.5 nm (the latter with a clear P-Cyg profile). An
image and the spectrum may be viewed at
http://sc6.sc.eso.org/~lvanzi/sn3318.html."
ROSAT ALL-SKY SURVEY FAINT SOURCE CATALOGUE
W. Voges, B. Aschenbach, T. Boller, H. Brauninger, U. Briel,
W. Burkert, K. Dennerl, J. Englhauser, R. Gruber, F. Haberl, G.
Hartner, G. Hasinger, E. Pfeffermann, W. Pietsch, P. Predehl, J.
Schmitt, J. Trumper, and U. Zimmermann, Max-Planck-Institut fur
Extraterrestrische Physik, Garching, report: "The ROSAT All-Sky
Survey Faint Source Catalogue (RASS-FSC) has been released and is
available through the World Wide Web (at
http://wave.xray.mpe.mpg.de/rosat/catalogues/rass-fsc/) and via
anonymous ftp (host ftp.xray.mpe.mpg.de, directory
rosat/catalogues/rass-fsc). This catalogue is derived from the
all-sky survey performed during the ROSAT mission in the energy
band 0.1-2.4 keV, and 105 924 sources are catalogued, representing
the faint extension to the RASS bright-source catalogue (RASS-BSC;
cf. IAUC 6420; Voges et al. 1999, A.Ap. 349, 389). The sources
contain at least six source photons and have a detection likelihood,
-ln (1-P), of at least 7, where P is the probability of source
detection. For each source we provide the ROSAT name, the position
in equatorial coordinates, the positional error, the source
countrate and error, the background countrate, exposure time, date
of observation, two hardness ratios and errors, extent and
likelihood of extent, and likelihood of detection. Questions or
comments may be directed to survey@xray.mpe.mpg.de."
(C) Copyright 2000 CBAT
2000 May 28 (7432) Daniel W. E. Green
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