Central Bureau for Astronomical Telegrams
IAUC 7377: SAX J1747.0-2853; 2000N; C/1999 E2
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Circular No. 7377
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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Phone 617-495-7244/7440/7444 (for emergency use only)
SAX J1747.0-2853
C. B. Markwardt, University of Maryland and Goddard Space
Flight Center (GSFC); and F. E. Marshall and J. H. Swank, GSFC,
report that RXTE PCA scans of the galactic bulge on Mar. 2.45 UT
have detected a bright transient source near the galactic center.
The position is consistent with a reappearance the bursting source
SAX J1747.0-2853, discovered by the SAX Wide Field Camera in 1998
(IAUC 6846). The source was again detected in two follow-up
pointed PCA observations and a subsequent galactic bulge scan. No
significant pulsations or quasiperiodic oscillations were found.
One x-ray burst was seen during the scan of Mar. 7.94. The
approximate x-ray intensities in the band 2-10 keV were: Mar. 2.45,
42 mCrab; 6.37, 129; 7.94, 140; 8.38, 130. As the intensity of the
source may still be increasing, further observations are encouraged.
SUPERNOVA 2000N IN MCG -02-34-054
S. Jha, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a low-S/N spectrum of SN 2000N
(cf. IAUC 7354) was obtained by Jha on Mar. 8.4 UT with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST spectrograph), showing
a broad P-Cyg H-alpha feature, indicating that the supernova is of
type II. Adopting the NASA/IPAC Extragalactic Database (NED)
recession velocity for MCG -02-34-054 of 3990 km/s yields a
supernova expansion velocity of about 6000 km/s.
E. Cappellaro, S. Benetti, M. Turatto, A. Pastorello, S.
Ortolani, and E. M. Corsini, Padua, report: "A spectrum (range
384-684 nm, resolution 1.0 nm) of SN 2000N, obtained on Mar. 9.2 UT
with the Danish 1.54-m telescope (+ DFOSC) at the European Southern
Observatory, closely resembles that of a type-II supernova, about 2
months past maximum. The expansion velocity deduced from H-alpha
and H-beta absorption is about 5000 km/s."
COMET C/1999 E2 (SOHO)
D. A. Biesecker, SM&A Corporation and Goddard Space Flight
Center, reports that M. Oates, Manchester, England, found another
Kreutz sungrazing comet in archival SOHO LASCO C3 Web data.
Astrometry and parabolic orbital elements appear on MPEC 2000-E39.
1999 UT R.A. (2000) Decl.
Mar. 2.513 23 19.1 - 8 35
(C) Copyright 2000 CBAT
2000 March 9 (7377) Daniel W. E. Green
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