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IAUC 7803: JUPITER I (IO); OPTICAL TRANSIENT IN Sex; 2002B

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                                                  Circular No. 7803
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)


JUPITER I (IO)
     E. Lellouch, Observatoire de Paris, Meudon; G. Paubert,
Institut de Radio-Astronomie Millimetrique; J. I. Moses, Lunar and
Planetary Institute; and N. M. Schneider, Laboratory for
Atmospheric and Space Physics, write:  "We observed Jupiter I (Io)
on Jan. 14-19 with the IRAM 30-m radiotelescope at Pico Veleta,
Spain.  We detected two rotational lines of NaCl at 234.252 and
143.237 GHz, providing the first observation of sodium chloride in
Io's atmosphere.  By comparison with SO_2 lines detected
simultaneously at 234.187 and 143.057 GHz, we roughly estimate a
NaCl/SO_2 mixing ratio of about 0.1 percent.  Atmospheric NaCl may
constitute a source of the long-observed sodium cloud around Io and
of the recently discovered chlorine ions in the Io plasma torus."


OPTICAL TRANSIENT IN SEXTANS
     A. Becker, Lucent Technologies (LT), Bell Laboratories; M.
Lopez-Caniego, Universidad Autonoma de Madrid; D. Norman, Cerro
Tololo Interamerican Observatory (CTIO); and D. Wittman, LT, on
behalf of the Deep Lens Survey team, report the detection, in five
600-s V-band frames taken on Jan. 11.32 UT and in five 600-s B-band
frames taken on Jan. 12.22 with the CTIO 4-m reflector, of an
unknown, hostless, point-source transient (V = 22.0, B = 22.4)
located at R.A. = 10h49m32s.82, Decl. = -4 31'45".4 (equinox
2000.0).  This object was not present in five 600-s V-band and five
600-s B-band images taken on 2001 Mar. 27.0 to limiting magnitudes
of approximately 25.5.  Additional photometry from Cerro Tololo and
also by J. P. Halpern and M. Jackson with the MDM Observatory 1.3-m
telescope on Kitt Peak (denoted by HJ):  Jan. 13.251, R = 22.2;
13.334, R = 22.1 (HJ); 13.428, V = 22.0 (HJ); 14.220, R = 22.2;
14.237, V = 21.9; 14.249, B = 22.0.


SUPERNOVA 2002B IN ANONYMOUS GALAXY
     A. Clocchiatti, Pontificia Universidad Catolica de Chile, on
behalf of the SuperMacho microlensing survey team (IAUC 7791),
reports on his spectroscopic observations of SN 2002B obtained on
Jan. 18.2 UT with the Las Campanas Observatory 6.5-m Baade
telescope (+ dual imager/spectrograph LDSS2):  "A fully reduced
spectrum (400-800 nm; resolution 1.2 nm) shows that SN 2002B is a
type-Ia supernova more than two weeks after maximum light.  The
spectrum resembles that of SN 1989B some 17 days after maximum.
The redshift of the parent galaxy, measured from H-alpha and [N II]
(658.3 nm), is 0.143."

                      (C) Copyright 2002 CBAT
2002 January 23                (7803)            Daniel W. E. Green

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