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FIRST CATALOGUE OF THE INTEGRAL1 /IBIS OFF-AXIS GAMMA-RAY BURST
R. Marcinkowski1 , M. Denis2 , T. Bulik3,4 , Ph. Laurent5,6 , P. Goldoni5,6 , and A. Rau
1 IPJ, 05-400 Swierk/Otwock, Poland CBK, Bartycka 18a, PL-00-716 Warsaw, Poland 3 CAMK, Bartycka 18, PL-00-716 Warsaw, Poland OA UW, Al. Ujazdowskie 4, PL-00-478 Warszawa, Poland 5 SAp CEA, Saclay, 91191 Gif sur Yvette, France 6 UMR 7164 11 Place M. Berthelot, 75231 Paris, France 7 MPE, Giessenbachstrasse, 85748 Garching, Germany 8 DA DPM&A, CIT, Pasadena, CA 91125, USA 2 7,8

4

ABSTRACT We present the first catalogue of the gamma-ray bursts (GRB) taking place outside of the INTEGRAL1 /IBIS field of view. Key words: GRB; gamma-ray.

1.

GRBS IN THE INTEGRAL

INTEGRAL (International Gamma Ray Astrophysics Laboratory) is an ESA mission devoted to space research in gamma-ray energy range. The INTEGRAL/IBIS/ISGRI instrument is a coded mask telescope with a field of view covering only a small area of the sky (4%) and therefore it detects and localizes about 10 GRB per year [1] in the field of view. ISGRI allows to localize GRBs in near real time with the accuracy of a few arc minutes. Moreover, it can measure the GRB spectra in the energy range between 15 and 1000 keV. Additionally INTEGRAL detects GRBs using anticoincidence scintillation system SPI ACS [2, 3]. SPI ACS detects more than 100 confirmed GRBs per year and provides GRBs' localizations as a node in the Interplanetary Network (IPN).

IBIS/INTEGRAL data. Table 1 shows 28 localized offaxis GRBs detected by INTEGRAL between November 2002 and December 2004. The columns off-axis and azimuth contain the position of the burst in the satellite coordinates (coded area is a square shape covering about 16-20 around the axis). The last column shows a list of the INTEGRAL's instruments seeing the given burst, where: I: ISGRI, P: PICSIT, C: IBIS Compton mode and PH: PICSIT histogramming mode (so called: SPTI). The GRBs in the table were localized by IPN except 030722A and 041226A. For GRB030722A IPN provided only an annulus, while using the IBIS Compton mode localization method [4] we determined the unique position of the burst. For 041226A position has been determined only using the IBIS Compton mode. Three GRBs, 021125A, 030320A and 041219A, occurred in the IBIS field of view, are at the bottom of the table since they have been detected at a significant level by the IBIS Compton mode and we used them for tests and calibration. During the period covered by this study, IBIS/INTEGRAL instruments have detected additional 30 bursts confirmed by the other satellite missions. Positions of these bursts have only been determined as annuli by the IPN. These bursts are not listed in the table.

THE ACKNOWLEDGMENTS This research was supported by the KBN grants 2 P03D 001 25 and 1 P03D 003 27.

2.

GRBS OUTSIDE THE INTEGRAL FIELD OF VIEW REFERENCES

We have developed algorithms to detect, localize and extract spectra of the GRBs outside the INTEGRAL field of view. These methods make use of the Compton mode
1 INTEGRAL is an ESA project with instruments and science data center funded by the ESA members (especially the PI countries: Denmark, France, Germany, Italy, Switzerland, Spain), Czech Republic, and Poland, and with the participation of Russia and USA

[1] S. Mereghetti et al, A&A 411, 2003 [2] A. von Kienlin, V. Beckmann, A. Rau, et al., A&A, 411, 2003, L299 [3] A. Rau, A. von Kienlin, K. Hurley, & G. G. Lichti, A&A , 438, 2005, p 1175 [4] Marcinkowski, R. et al., A&A, 452, L113, 2006


Table 1. List of the localized INTEGRAL off-axis GRBs detected in the INTEGRAL instruments during two years of mission. For detailed description see the text GRB 021206A 030204A 030217A 030325A 030326A 030329A 030405A 030406A 030414A 030422A or 030501B 030509A 030721A 030722A 030725A 030726A 030801A 030827A 031024A 031026A 031108A 031109B 031111A 031214A 040322A 040511A 041016A 041211A 041226A 021125A 030320A 041219A 01:17:17 05:50:23 23:41:07 13:31:41 11:46:24 06:38:24 16:51:49 16:08:40 09:24:10 01:26:29 14:11:00 11:10:20 16:45:12 10:10:49 07:29:02 13:01:49 04:39:35 11:31:47 17:22:26 17:58:23 10:12:09 01:43:00 8.0 5.7 30.3 14.7 25.7 39.0 28.8 8.0 5.2 0.4 33.0 100.0 9.9 0.45 0.25 30 6 17 12 30.0 269.0 540.0 time of day [IJD] 22:49:08 12:45:29 02:45:37 14:15:11 10:43:42 11:37:25 02:17:27 22:42:03 13:48:24 07:51:12 duration [s] 7.5 34.0 50.8 1.8 5.0 20.4 4.0 62.1 21.7 7.8 R.A. [ ] 240.18 0.83 186.59 70.77 292.96 161.20 248.20 285.42 119.88 265.61 286.39 290.60 78.70 273.63 106.50 308.48 253.70 130.17 223.18 225.44 336.00 66.72 327 71.7 245.47 236. 221.95 26.0 100.8 343.5 296.85 267.90 6.12 Dec [ ] -9.72 32.72 -11.86 19.10 -11.72 21.50 -24.15 -68.07 -48.58 -6.90 13.78 28.40 11.13 -40.48 -15.50 -50.70 -21.11 -25.86 48.59 -16.15 0.11 -5.93 20 18.1 -11.5 21.0 -44.25 -4.28 20.39 14.4 28.26 -25.30 62.84 off-axis [ ] 71.79 125.92 105.47 149.68 39.19 79.79 31.31 36.90 98.97 25.35 50.78 37.98 145.85 96.26 76.57 90.78 82.26 108.1 87.65 135.42 114.37 92.57 44 53.55 106.32 90.13 35.94 110.88 104.09 46.00 7.32 15.48 3.16 azimuth [ ] 341.6 5.17 169.79 299.0 62.21 168.61 108.46 281.01 252.69 95.01 70.33 79.08 5.27 156.55 29.58 148.94 227.32 46.78 296.09 0.05 171.22 155.75 200 208.13 340.75 126.91 163.31 162.35 196.66 44.77 34.94 31.24 66.65 I PH I PH IC IC I IC I I I P I I PH C I PH C I PH I PH C P I I I PH C IPC I PH C I PH C "mode" I PH C I PH I I I PH C I I PH C I PH C I I PH C