Central Bureau for Astronomical Telegrams
IAUC 8154: 2003ge; eta Car; XTE J1814-338
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Circular No. 8154
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)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)
SUPERNOVA 2003ge IN NGC 6122
Further to IAUC 8147, T. Puckett and A. Langoussis report the
discovery of an apparent supernova (mag 17.8) on an unfiltered CCD
frame taken on June 21.19 UT (confirmed via CCD on June 22.08 by M.
Marcus). SN 2003ge is located at R.A. = 16h20m08s.75, Decl. =
+37o47'53".7 (equinox 2000.0), which is 8".8 west and 0".1 north of
the center of NGC 6122, but it is not present on images taken by
Puckett on 2002 Sept. 13 (limiting mag about 20.5) or on the
Palomar Sky Survey (1993 Apr. 30; limiting mag about 21.1).
eta CARINAE
Further to IAUC 8146, M. F. Corcoran reports that, since Mar.
6, daily monitoring PCA observations of eta Car with the RXTE show
six x-ray peaks with a quasi-period of about 21 days, the last
having occurred on June 15 (about 19.9 days after the previous
x-ray peak) with a 2-10-keV flux of 2.1 x 10**-10 erg s**-1 cm**-2.
On June 19, the 2-10-keV flux had fallen to 7.2 x 10**-11 erg s**-1
cm**-2; eta Car has not been this faint in x-rays since 2002 Feb.
26 -- suggesting continuation of the x-ray eclipse ingress (IAUC
8146). A straight-line fit to the June 15-19 data suggests that
the x-ray minimum would be reached on June 21.
XTE J1814-338
M. I. Krauss, A. Dullighan, and D. Chakrabarty, Massachusetts
Institute of Technology; M. H. van Kerkwijk, University of Toronto;
and C. B. Markwardt, University of Maryland and Goddard Space
Flight Center, report on a 9700-s observation of XTE J1814-338
(IAUC 8144) on June 20.1 UT with the Chandra X-Ray Observatory (+
ACIS-S/HETGS). The x-ray source remains active, with a 0.5-10-keV
flux of approximately 15 mCrab. Its position is R.A. =
18h13m39s.03, Decl. = -33o46'22".3 (equinox 2000.0), with a 90-
percent-confidence radius of 0".6. The likely optical counterpart
was also observed at this position in images acquired on June 6.4
with the Magellan/Clay 6.5-m telescope in Chile, with magnitudes of
B = 17.3 and R = 18.8 (uncertainties 0.1 mag). The star brightened
by about 0.2 mag in both bands on June 7.4, and it was undetected
in a 1989 Digitized Sky Survey image (limiting mag R > 20). Note
that there is a nearby field star of similar brightness (R = 19, B
= 20) located just 1".7 southeast of the proposed counterpart.
Further multiwavelength observations of the pulsar as it fades are
strongly encouraged.
(C) Copyright 2003 CBAT
2003 June 22 (8154) Daniel W. E. Green
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