GRB 030929

K. Hurley and T. Cline, on behalf of the Ulysses and Konus GRB teams,

E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team, and

A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL
SPI-ACS GRB team, report:

Konus-Wind  and INTEGRAL (SPI-ACS) observed this 0.45 s long GRB at
52035 seconds.  We have triangulated it to a preliminary annulus
centered  at RA, Decl(2000)= 275.939,  -7.164 degrees, whose radius is
71.705 +/-  2.324 degrees (3 sigma).  As this annulus does not
include any of the known SGRs, this event is probably a short/hard
GRB.

As this event was not observed by Mars Odyssey or Ulysses, a small
error box cannot be derived for it.

E. O. Ofek, D. Poznanski, A. Gal-Yam and Y. Lipkin
(Wise observatory, TAU) report:

We searched the list of IPN error-boxes derived for GRBs detected 
between September 15 and October 28 2003,
for a spatial coincidence with SN 2003jd (Burket, Swift and Li, 2003; IAUC
8232), which is spectroscopically similar to SNe 1998bw and 2003dh,
associated with GRBs 980425 and 030329, respectively 
(Filippenko, Foley, and Swift 2003, IAUC 8234;
Matheson et al. 2003, IAUC 8234, GCN 2431
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 ).

We find that the position of SN 2003jd falls within the 3-sigma preliminary
error annulus of the short/hard GRB 030929 (Hurley et al. 2003; GCN 2409
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 )
detected by Konus-Wind and INTEGRAL (SPI-ACS).

Since the total area of IPN 3-sigma error-boxes and annuli derived 
between Sep. 15 and Oct. 28 2003 covers 5.6% of the entire sky,
and the reported error annulus is preliminary, this coincidence
may well be by mere chance. We also note that GRB 030929 is a 
short, hard burst, while previous events associated with SN 1998bw-like SNe Ic 
were of the long, soft variety. Additionally, if SN 2003jd is associated
with GRB 030929, the SN rise time (~30 days) is somewhat longer
than observed in previous cases (e.g., ~17 days, for SN 1998bw).

Further inspection of the relevant IPN data may shed more light on
this possible association.

K. Hurley and T. Cline, on behalf of the Ulysses, HETE, Mars Odyssey,
and KONUS GRB teams,

E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team,

A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL
SPI-ACS GRB team,

I. Mitrofanov, S. Charyshnikov, V. Grinkov, A. Kozyrev, M. Litvak, and
A. Sanin, on behalf of the HEND-Odyssey GRB team,

W. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr, on
behalf of the GRS-Odyssey GRB team,

G. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R.
Vanderspek, J. Villasenor, G. Crew, G. Monnelly, N. Butler, J.G.
Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin, J. Braga, R.
Manchanda, G.  Pizzichini, Y. Shirasaki, C. Graziani, M. Matsuoka, T.
Tamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi,
T. Tavenner, T.  Donaghy, M. Boer, J-F Olive, and J-P Dezalay, on
behalf of the HETE GRB team, and

D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wigger, W.
Hajdas, and A. Zehnder, on behalf of the RHESSI GRB team, report:

It has been suggested by Ofek et al. (GCN 2434
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 ) that the
short-duration, hard-spectrum GRB030929 (Hurley et al., GCN 2409
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 ) may
be associated with SN2003jd (Smith et al. IAUC 8021, Filippenko et al.
IAUC 8234, Matheson et al., GCN 2431
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 ) and that further analysis of the
IPN data might confirm or disprove this hypothesis.  Accordingly, we
have done a more thorough analysis of the data of all the IPN
spacecraft for this event.  We find that the position of the SN is not
consistent with the IPN localization.  Our analysis may be summarized
as follows.

1. Only two spacecraft, Konus and INTEGRAL (SPI-ACS), detected this
burst.  The orientation of the INTEGRAL spacecraft was such that
SPI-ACS presented its maximum area to the direction of SN2003jd, yet
the response of this detector was quite weak, suggesting that burst
did not arrive from this direction.

2. The IPN annulus (Konus-INTEGRAL) has been recalculated using data
with higher time resolution.  It is centered at RA, Decl(2000)=
275.939, -7.164 degrees, with radius 72.209 +/- 2.316 degrees (3
sigma).  SN2003jd indeed lies within both the preliminary annulus (GCN
2409
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 ) and this refined one.  However, the Konus data indicate that the
burst arrived from an ecliptic latitude between +15 and +90 degrees, that
is, from those portions of the annulus north of RA, Decl=202, +7
degrees, and 344, +9 degrees. SN2003jd therefore lies >15 degrees
outside the allowed portions of the annulus.

3. Although the Ulysses data were clean and complete, and although the
detectors are omnidirectional, Ulysses did not detect this burst.  However,
this could be explained by the fact that it was relatively weak and had
a hard spectrum.

4. Mars Odyssey (HEND and GRS) similarly had clean and complete data,
but did not detect the event.  A burst arriving from the direction of
SN2003jd would have been visible to HEND and GRS (That is, not
Mars-blocked).  Given the sensitivities, it is likely, although by no
means certain, that at least one of these instruments would have
detected this burst if it had arrived from the direction of SN2003jd.

5. RHESSI data were also clean and complete, and the position of
SN2003jd was not Earth-blocked.  However, it did not detect this
burst.

6. No data were available from the HETE spacecraft at the time of this
burst.

Thus, solely on the basis of the IPN localization data, we consider it
to be unlikely that there is any association between GRB030929 and
SN2003jd.