IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 7981: 2002ez, 2002fv, 2002fw, 2002fx, 2002fy, 2002fz, 2002ga

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).


Read IAUC 7980  SEARCH Read IAUC 7982

View IAUC 7981 in .dvi or .ps format.
IAUC number


                                                  Circular No. 7981
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)


SUPERNOVAE 2002ez, 2002fv, 2002fw, 2002fx, 2002fy, 2002fz, 2002ga
     M. Giavalisco and A. Riess, Space Telescope Science Institute,
on behalf of the data searchers of the 'Great Observatories Origins
Deep Survey (GOODS) Treasury Team' (M. Giavalisco, S. Casertano, T.
Dahlen, M. Dickinson, H. Ferguson, R. Hook, R. Idzi, A. Koekemoer,
B. Mobasher, L. A. Moustakas, S. Ravindranath) and the Hubble
Higher-z Supernova Team (A. Riess, L. Strolger, J. Tonry, P.
Challis), report the discovery of six apparent new supernovae on
CCD images taken in the interval Sept. 19-22 with the Advanced
Camera for Surveys (ACS) on the Hubble Space Telescope during the
GOODS observations of the Chandra Deep Field South.  The apparent
supernovae were detected by subtracting two groups of ACS images of
the same fields, the first taken during July 31-Aug. 4 and the
second durng Sept. 19-22.  Each new object was detected
independently in each of four separate z-band (F850lp) exposures
and two i-band (F775W) exposures taken during Sept. 19-22, with
five of the six objects also detected in two v-band (F606W)
exposures.  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 image
over a time span of about 45 min eliminates the possibility that
these are small bodies in the solar system.  The following table
summarizes the findings.  The z-band magnitudes below are relative
to Vega, and uncertainties are typically 0.05-0.1 mag (random),
with a systematic zero-point uncertainty of 0.1 mag.  SNe 2002fv
and 2002fy have no apparent host galaxies.

SN       2002 UT          R.A. (2000.0) Decl.   Mag.   Offset
2002fv   Sept. 19.58   3 32 19.22  -27 49 34.0  25.2      --
2002fw         19.86   3 32 37.52  -27 46 46.6  24.6   0".51 W, 0".21 N
2002fx         20.84   3 32 06.80  -27 44 34.4  25.5   0".09 W, 0".04 S
2002fy         20.99   3 32 18.12  -27 41 55.6  24.9      --
2002fz         21.60   3 32 48.54  -27 54 17.6  24.9   1".30 E, 1".66 S
2002ga         22.52   3 32 32.62  -27 53 16.7  24.9   0".21 E, 0".08 S

Additional z-band magnitude estimates:  SN 2002fv, Aug. 4.19 UT,
[28.0; SN 2002fw, Aug. 1.39, [28.0; SN 2002fx, Aug. 4.33, [28.0; SN
2002fy, Aug. 3.92, 23.8; SN 2002fz, Aug. 1.12, 25.5; SN 2002ga,
Aug. 2.26, 26.3.
     Corrigendum.  On IAUC 7967, the offset of SN 2002ez from the
center of its apparent host galaxy should read  4" E, 24" S.

                      (C) Copyright 2002 CBAT
2002 September 30              (7981)            Daniel W. E. Green

Read IAUC 7980  SEARCH Read IAUC 7982

View IAUC 7981 in .dvi or .ps format.


Our Web policy. Index to the CBAT/MPC/ICQ pages.


Valid HTML 4.01!