//////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1941 SUBJECT: Possible GRB 030320 localized by INTEGRAL DATE: 03/03/20 16:32:22 GMT FROM: Diego Gotz at IASF-CNR S. Mereghetti, D. Gotz, J. Borkowski on behalf of the IBAS Localization Team, A. Paizis, V. Beckmann, M. Turler on behalf the INTEGRAL Science Data Centre and the INTEGRAL Science Working Team report the detection of a possible GRB at 10:11:40 UTC. The burst lasted about 80 seconds. The preliminary position is RA 17h 51m 43s DEC -25deg 18' 34'' (J2000). The burst has been detected at large off-axis angle, near the edge of the field of view of IBIS. The uncertainty on the above position is 5' radius. This message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1942 SUBJECT: IPN triangulation of GRB030320 DATE: 03/03/20 17:42:36 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley and T. Cline, on behalf of the Ulysses, Mars Odyssey, and KONUS GRB teams, I. Mitrofanov, D. Anfimov, 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, 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, Mars Odyssey (HEND), and INTEGRAL (SPI-ACS) observed this event (GCN 1941). We confirm that this is indeed a gamma-ray burst. Because the burst arrived along a direction close to the Konus-Mars vector, the triangulation annulus is imprecise. It is centered at RA, Decl = 280.256, -23.488 degrees, and has a radius 11.122 +/- 0.456 degrees. This annulus is consistent with, but does not constrain, the IBIS localization in GCN 1941. Ulysses data are expected within 24 hours, and may improve this triangulation. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1943 SUBJECT: IPN triangulation of GRB030320 (small error box) DATE: 03/03/21 16:54:25 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley and T. Cline, on behalf of the Ulysses, Konus, and Mars Odyssey GRB teams, I. Mitrofanov, D. Anfimov, 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, E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team, D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wigger, W. Hajdas, and A. Zehnder, on behalf of the RHESSI GRB team, and A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, report: Ulysses, Mars Odyssey (HEND and GRS), Konus-Wind, RHESSI, and INTEGRAL (SPI-ACS) observed this GRB at 36720 seconds (GCN 1941, 1942). As observed by Ulysses, it had a duration of approximately 50 seconds, a 25-100 keV fluence of approximately 1.1E-05 erg/cm2, and a peak flux of approximately 6.7E-07 erg/cm2 s over 0.50 seconds. We have triangulated it to a preliminary, 3 sigma error box whose approximate area is 1000 sq. arcmin. and whose coordinates are: RA(2000) DEC(2000) ERROR BOX CENTER: 17 h 51 m 58.46 s -25 o 14 ' 24.52 " ERROR BOX CORNER 1: 17 h 51 m 05.79 s -25 o 26 ' 56.97 " ERROR BOX CORNER 2: 17 h 57 m 39.45 s -23 o 22 ' 49.88 " ERROR BOX CORNER 3: 17 h 47 m 34.20 s -26 o 42 ' 28.35 " ERROR BOX CORNER 4: 17 h 52 m 52.62 s -25 o 01 ' 24.10 " The Ulysses-Konus annulus may be used to constrain the IBIS error circle (GCN 1941) and reduce its area by a factor of about 1.8, to 44 sq. arcmin. The intersection points are: RA (2000) DEC (2000) 17 h 51 m 24.08 s -25 o 21 ' 09.30 " 17 h 51 m 47.70 s -25 o 13 ' 40.69 " 17 h 51 m 42.63 s -25 o 23 ' 33.78 " 17 h 52 m 03.80 s -25 o 16 ' 51.37 " A map will be posted shortly at ssl.berkeley.edu/ipn/030320. This error box may be improved. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1944 SUBJECT: IPN triangulation of GRB030320B (annulus) DATE: 03/03/21 18:54:57 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley and T. Cline, on behalf of the Ulysses and HETE GRB teams, D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wiggger, W. Hajdas, and A. Zehnder, on behalf of the RHESSI GRB team, and 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, report: Ulysses, RHESSI, and HETE-FREGATE observed this GRB at 67757 seconds. As observed by Ulysses, it had a duration of approximately 150 seconds, a 25-100 keV fluence of approximately 1.2E-05 erg/cm2, and a peak flux of approximately 4.6E-07 erg/cm2 s over 0.50 seconds. We have triangulated it to a preliminary annulus centered at RA, Decl(2000)= 160.920, 41.819 degrees, whose radius is 85.870 +/- 0.122 degrees (3 sigma ). This annulus may be constrained and/or improved, but as the event was not observed by Mars Odyssey, a small error box cannot be derived for it. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1946 SUBJECT: GRB 030320: Optical Observations DATE: 03/03/24 14:49:59 GMT FROM: Avishay Gal-Yam at Tel Aviv U, Israel A. Gal-Yam and E. O. Ofek (Wise observatory, TAU) report: We have observed the full error box of GRB 030320 (Mereghetti et al. 2003, GCN 1341; Hurley et al. 2003, GCN 1943) using the Wise observatory 1m telescope + Tek CCD camera, starting March 21, 02:42 UT (16.9 hours after the burst). Two 300 s R-band frames were obtained under poor conditions at high airmass. Comparison of the combined image with the POSS-II E plate reveals no new optical sources, to a limiting magnitude of R=17.5, within the IBIS error circle. [GCN OPS NOTE (24mar03): This submission was delayed 2.5 hours due to an email account change. And in general, I remind people to help me help you by keeping me advised of your address changes.]