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IAUC 8125: S/2003 J 19, S/2003 J 20; 2003dx, 2003dy, 2003dz, 2003ea, 2003eb; C/2003 H2

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                                                  Circular No. 8125
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)


S/2003 J 19 AND S/2003 J 20
     Further to IAUC 8116, the discoveries of two new satellites of
Jupiter have been reported by teams led by B. Gladman (S/2003 J 19)
and by S. S. Sheppard (S/2003 J 20).  Astrometry, preliminary
orbital elements by B. G. Marsden, and ephemerides appear on MPEC
2003-G64 (S/2003 J 19, e = 0.33, i = 163 deg, P = 701 days, H =
16.7) and MPEC 2003-G67 (S/2003 J 20, e = 0.29, i = 55 deg, P = 455
days, H = 15.6).


SUPERNOVAE 2003dx, 2003dy, 2003dz, 2003ea, 2003eb
     A. Riess, Space Telescope Science Institute, reports [on
behalf of the GOODS Treasury Team (cf. IAUC 8052 and 8081, plus D.
de Mello) and the Hubble Higher-z Supernova Team] the discovery of
five apparent supernovae in images of the region around the Hubble
Space Telescope 'Deep Field', each detected by subtracting ACS
images taken on Feb. 20-23 from those taken on Apr. 4-5.   None of
these transients was detected in F850lp images taken on 2002 Nov.
21-25 and 2003 Jan. 2-6 (limiting mag 27.0).  Each apparent
supernova was detected independently in each of four separate
z-band (F850lp) and two i-band (F775W) images.  The morphology of
each transient is consistent with that of the ACS Point Spread
Function (FWHM 0".1).  The lack of detectable motion (< 0".05)
relative to other sources in the images over about 45 min
eliminates the possibility that these are small bodies in the solar
system; other possibilites such as flare stars, closer cataclysmic
variable stars, and active galactic nuclei are also dismissed as
unlikely.  The offsets given below are from the centers of the
nearest galaxies visible in the ACS images.

SN      2003 UT      R.A.  (2000.0)  Decl.     z    Offset
2003dx  Apr. 4.52  12 36 31.75  +62 08 48.7  25.2  0".15 E, 0".10 N
2003dy  Apr. 4.67  12 37 09.16  +62 11 29.0  24.5  0".25 E, 0".35 S
2003dz  Apr. 4.79  12 36 39.91  +62 07 52.7  25.1  0".25 W
2003ea  Apr. 5.65  12 37 12.04  +62 12 38.3  25.4  0".15 N
2003eb  Apr. 5.65  12 37 15.18  +62 13 34.6  22.8  0".50 E, 0".75 S


COMET C/2003 H2 (LINEAR)
     Further to IAUC 8122, J. McGaha (Tucson, AZ) reports that six
stacked 2-min CCD exposures taken on Apr. 25.3 UT (0.30-m reflector)
show a 6" coma and a 10" tail in p.a. 50 deg.

                      (C) Copyright 2003 CBAT
2003 April 30                  (8125)            Daniel W. E. Green

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