Central Bureau for Astronomical Telegrams
IAUC 7379: 2000P; AX J1747.1-2845, THE GALACTIC CENTER REGION
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Circular No. 7379
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)
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URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)
SUPERNOVA 2000P IN NGC 4965
S. Jha, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum of SN 2000P (cf.
IAUC 7378), taken by M. Calkins on Mar. 10.4 UT with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST spectrograph), shows it
to be a type-II supernova at an early epoch. The spectrum exhibits
a very blue continuum, with P-Cyg Balmer lines and He I. The
H-alpha and H-beta profiles show narrow emission (FWHM < 500 km/s),
but this appears to be from a superimposed H II region, rather than
being intrinsic to the supernova. The narrow lines provide a
recession velocity of 2230 km/s for the host galaxy, and the H-beta
P-Cyg profile yields an expansion velocity for the supernova of
7400 km/s.
Corrigendum. On IAUC 7378, last line, for 09s.88, 13'59".3.
read 10s.56, 14'02".5.
AX J1747.1-2845 AND THE GALACTIC CENTER REGION
H. Murakami, M. Sakano, and K. Koyama, Kyoto University; T.
Furusho, Tokyo Metropolitan University; and T. Sakamoto, RIKEN,
write: "A new transient x-ray source, designated AX J1747.1-2845,
was discovered by on-going ultra-deep observations of the Galactic-
center region with the ASCA satellite made since Mar. 11.0 UT. The
position of the new transient is R.A. = 17h47m07s.0, Decl. =
-28o45'09" (equinox 2000.0; estimated error radius 1'.2, 90-percent
confidence). No x-ray source has so far been reported within this
error circle. The x-ray spectrum is well represented by a power
law with photon index about 2.5, undergoing a photoelectric
absorption with a hydrogen column density of 1.0 x 10**23
atoms/cm**2. The observed 2-10-keV flux is 2.3 x 10**-10 erg s**-1
cm**-2. Another transient source is detected at R.A. = 17h47m01s.3,
Decl. = -28o52'52" (error radius 1'), with a 2-10-keV flux of 2.1 x
10**-9 erg s**-1 cm**-2; the position is consistent with the x-ray
burster SAX J1747.0-2853, which was recently reported to become
luminous again (IAUC 7377). We have also detected the persistent
source 1E 1743.1-2843 with a 2-10-keV flux of 1.0 x 10**-10 erg
s**-1 cm**-2. The Galactic nuclei Sgr A* is not resolved into a
point source. The 2-10-keV flux within the 3'-radius region
centered on Sgr A* is 6 x 10**-11 erg s**-1 cm**-2. The ASCA
observation continues until Mar. 22.0. Simultaneous observations
are encouraged."
(C) Copyright 2000 CBAT
2000 March 13 (7379) Daniel W. E. Green
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