Central Bureau for Astronomical Telegrams
IAUC 6102: ROSAT SOURCE CATALOGUE; RE J1255+266; HD 5980
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Circular No. 6102
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
Phone 617-495-7244/7440/7444 TWX 710-320-6842 ASTROGRAM CAM
MARSDEN@CFA.HARVARD.EDU or GREEN@CFA.HARVARD.EDU (science)
ROSAT SOURCE CATALOGUE
H.-U. Zimmermann, Max-Planck-Institut fur Extraterrestrische
Physik (MPE), Garching, writes: "The ROSAT Consortium (MPE,
Garching; Goddard Space Flight Center; Smithsonian Astrophysical
Observatory; and the WFC-Consortium in the U.K.) announces the
public release on Oct. 26 of The First Rosat Source Catalogue of
Pointed Observations with the PSPC. This catalogue contains 50408
sources from 2876 pointed observations. For each source, the
following properties are provided: the observation number, the ROSAT
name, the position in equatorial and in galactic coordinates, four
positional errors (intrinsic, systematic, boresight, and total),
the source countrate and its error, the background countrate,
exposure time, hardness-ratios HR1 and HR2 and their errors, extent
and likelihood of extent, likelihoods of the map-detect algorithm
and of the maximum-likelihood detection algorithm, etc. The present
version of the catalogue comprises observations that have been
performed until the end of May 1993 and which are in the public ROSAT
Data Archive. Confused sources and 124 observations with overly
crowded regions or regions of high-surface-brightness diffuse emission
have been removed. The resulting 50408 sources have a likelihood
of at least 10, corresponding to a rate of accidental detections
of about 1 percent. The new catalogue can be accessed via
the interactive account (telnet) xray.mpe-garching.mpg.de with
username xray (no password) by typing browse rosatsrc. Database
'rosatseq' (browse rosatseq) contains information on the individual
observation fields. Questions/comments may be e-mailed to
rosat_svc@mpe-garching.mpg.de."
RE J1255+266
W. Wenzel, Sonneberg Observatory, communicates: "No trace of
RE J1255+266 (cf. IAUC 6085) appears to a threshold of mpg =
11.5-12 on 16 sky-patrol plates taken by B. Fuhrmann between Jan.
17 and June 7."
HD 5980
F. M. Bateson, Variable Star Section, Royal Astronomical
Society of New Zealand, reports (via A. Gilmore): "HD 5980 (cf.
IAUC 6099) has been monitored by A. F. Jones, Nelson, since 1958.
He first detected an increase in brightness of 1 mag on 1994
July 18.7 UT (VSS Circular M94/7, RASNZ)."
1994 November 9 (6102) Daniel W. E. Green
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