//////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2562 SUBJECT: GRB 040403: optical observations DATE: 04/04/04 02:58:43 GMT FROM: Rodion Burenin at IKI, Moscow I. Khamitov, Z. Aslan, M. Parmaksizoglu (TUG), R. Burenin, M. Pavlinsky, R. Sunyaev (IKI), I. Bikmaev, N. Sakhibullin (KSU) report: We observed the entire error circle of INTEGRAL GRB 040403 (Gotz et al., GCN 2560) in R band, with 1.5-m Russian-Turkish Telescope RTT150 at Bakyrlytepe, Turkey. The observations were started at 17:22 UT and lasted for few hours under bad seeng conditions (2--3'') and bright moon. We detected no source brighter than R=21.0, which is variable for more than 0.2 mag. This message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2563 SUBJECT: GRB 040403: Optical observations DATE: 04/04/04 22:59:39 GMT FROM: Arto Oksanen at Nyrola Obs., Finland P. Tikkanen and A. Oksanen on behalf of Nyrola observatory GRB Team and AAVSO International High Energy Network report: A 24 x 16 arcmin field covering the INTEGRAL error circle of GRB 040403 (GCN 2560) was imaged with the 0.4m SCT of the Nyrola Observatory starting at April 3, 2004 20:05 UT, 15.0 hours after the burst. Observation was taken under quite poor conditions, bright moonlight, northern lights and moderate seeing. Total of 53 four minute Rc-exposures, exposure time of 12720 seconds, were sigma reject combined and compared against the Digitized Sky Survey (DSS2R). No new objects brighter than DSS2 plate limit was detected, but some fainter objects were also present inside error circle. The faintest stars on the combined image are about Rc=20.4 (USNOA2.0 reference). The combined image is available on web: http://nyrola.jklsirius.fi/grb/grb040403 Nyrola observatory wants to express gratitude to AAVSO for loaning the CCD camera and to Wihuri foundation for generous grants for the observatory. The AAVSO International High Energy network is grateful for a generous grant from the Curry Foundation and to NASA for the financial support for the High Energy Workshops for Amateur Astronomers. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2564 SUBJECT: GRB 040403 Optical Observations DATE: 04/04/05 07:04:21 GMT FROM: Kuntal Mishra at State Obs,Nainital,India Kuntal Mishra on behalf of the GRB team reports: We observed the error circle of INTEGRAL GRB 040403 (Gotz et al., GCN 2560) in R band, with 1.0-m telescope at Nainital (India) on April 03, 2004 starting at 16:44 UT. We found no new source brighter than R = 19.5 when comparing with DSS-2 R-band chart (USNOA2.0 reference). Ms.KUNTAL MISHRA (JRF) email: kuntal@upso.ernet.in STATE OBSERVATORY, : kuntal_mishra@yahoo.com MANORA PEAK, NAINITAL Phone: (91-05942) 235136, 235583 UTTARANCHAL 263 129 Fax : (91-05942) 235126, 235053 INDIA. Gram : Astronomy //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2565 SUBJECT: GRB 040403: Optical Observations DATE: 04/04/06 17:37:20 GMT FROM: Vasilij Rumjantsev at CrAO V.Rumyantsev (CrAO) and A.Pozanenko (IKI) report: We have obtained 10 unfiltered images (300 s exposure each) of the GRB040403 error box (D.Gotz et al., GCN 2560). The images were taken with the AT-64 telescope of Crimean Astrophysical observatory and cover the period UT 17:48:54 - 18:37:24 of April 3, 2004. No afterglow candidate was found in comparison with DSS2. We estimated the limiting magnitudes of combined image (S/N=3) as following Start time (UT) telescope exposure limiting mag. Apr. 03 17:48 AT-64 10x300 s 20.0 Combined image can be found at http://grb.rssi.ru/GRB040403/ This message can be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2566 SUBJECT: HETE/IPN localization of GRB040403A (=H3143, a long burst) and GRB040403B(=H3144, a short/hard burst) DATE: 04/04/09 21:16:39 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley, on behalf of the HETE GRB Team, E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team, G. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R. Vanderspek, J. Villasenor, G. Crew, A. Dullighan, 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 T. Cline, on behalf of the HETE and Konus-Wind GRB teams, report: HETE detected two GRBs on 2004 April 03; the presence of Sco X-1 in the WXM field-of-view made analyses and reporting of their results somewhat complicated. Both events were also detected by Konus-Wind, but by no other instruments in the IPN. GRB040403A was detected as trigger #H3143 at 16:55:03 UT (60903 SOD). It was detected primarily in the Fregate 30-400 keV band. The absence of a signal in the 7-40 and 7-80 keV bands indicates that the burst was detected at the edge of the Fregate FOV; there was no discernable signal in the WXM. The WXM flight software looked for a real-time localization for GRB040403A, but was able only to localize Sco X-1: this position was distributed to the GCN 27 seconds after burst detection. After detailed analysis of the WXM data, the localization was retracted two hours after the initial report. Due to a software error, the retraction Notice indicated that the trigger was not a real GRB; H3143 is indeed a real GRB, but the position distributed in real time was not that of the burst. A combination of triangulation, the Konus ecliptic latitude response, and HETE Earth-blocking give a large 5-sided error box whose shape is complex, and whose corners are at: RA(2000) Decl(2000) 263 +20.5 282 +33.1 302 +37.4 308 +37.8 304 +25.7 A map has been posted at ssl.berkeley.edu/ipn3/040403A. As observed by Konus-Wind, this burst had a duration of 98s, a 20-2000 keV fluence of 6E-5 erg/cm2 (or 4E-5 in 30-400 keV range), a 20-2000 keV peak flux ~ 2.6E-6 erg/cm2 s, and an Epeak=340+/-20 keV. GRB040403B was detected as trigger #H3144 at 23:23:55 UT (84236 SOD). As observed by FREGATE, it consists of two short (0.5s) spikes separated by ~0.8s. The burst is seen most strongly in the 30-400 keV band with an Epeak well above this range. GRB040403B therefore qualifies as a short/hard burst. The burst was marginally detected by the WXM; unfortunately, the presence of Sco X-1 in the WXM FOV makes localization of this burst impossible. The SXC was not operating at this time because of the full moon. Triangulation gives an annulus of location centered at RA, Decl=127.559, +21.669, whose radius is 70.529 +/- 2.155 degrees (3 sigma). The WXM field of view limits this annulus to an error box with the following corners: RA(2000) Decl(2000) 188.213 -1.116 191.330 -15.436 199.758 +36.566 212.802 +40.309 A map may be viewed at ssl.berkeley.edu/ipn3/040403B. As observed by Konus-Wind, this burst had a 20-2000 keV fluence ~ 2E-6 erg/cm2, a peak flux ~ 4.5E-6 erg/cm2 s, and an Epeak=1300+/-1000 keV. This message can be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2571 SUBJECT: GRB 040403, deep optical observations DATE: 04/04/22 07:37:37 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia GRB 040403, deep optical observations ---------------------------------------------- A. de Ugarte, A. Sota, J. Gorosabel and A. J. Castro-Tirado (Instituto de Astrofísica de Andalucía, IAA-CSIC, Granada), and J. M. Castro Cerón (STScI, Baltimore) communicate: "We observed the field of the X-ray rich GRB 040403 detected by INTEGRAL (GCN Circ. 2560, Gotz et al.) starting on 3 Apr 2004 (20:00 UT) with the 1.5 m telescope at the Observatorio de Sierra Nevada in Granada. Imagery was obtained in the R- band (6 x 600 s). Comparison images were adquired on 4 and 20 Apr 2004 (9 x 600 s). No optical variable source is detected within the 3' radius error box provided by IBIS/IGRIS down to a limiting magnitude of 22.2 (3 sigma) 15 hr after the event. This might be indicative of a dark GRB." This message may be cited.