[62.07] An INTEGRAL ToO Observation of SGR1806-20

AAS 203rd Meeting, January 2004
Session 62 HETE and Other Clues to GRBs
Oral, Tuesday, January 6, 2004, 10:00-11:30am, Centennial IV

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[62.07] An INTEGRAL ToO Observation of SGR1806-20

K. Hurley (UC Berkeley), R. Aptekar, E. Mazets, S. Golenetskii (Ioffe Physico-Technical Institute), J.-L. Atteia (LAOMP), M. Boer (CESR), S. Brandt, N. Lund (DSRI), T. Cline (NASA-GSFC), E. Costa, M. Feroci, P. Ubertini, M. Del Santo (IASF-Roma), F. Frontera (Univ. of Ferrara, Italy, and IASF Bologna), G. Pizzichini (IASF Bologna), A. Castro-Tirado (LAEFF), A. Giminez, C. Winkler (ESTEC), V. Schoenfelder, A. von Kienlin, G. Lichti (MPE), P. Kretschmar, N. Produit (ISDC), S. Mereghetti, D. Gotz (IASF-Milano), F. Mirabel (CEA-Saclay), P. Woods, E. Gogus, C. Kouveliotou, M. Finger (USRA-NSSTC), C. Thompson (CITA), R. Duncan (UT Austin), H. Pedersen (Copenhagen Univ. Obs.), G. Pavlov (Pennsylvania State Univ.), M. van der Klis (Univ. of Amsterdam)

The Soft Gamma Repeater SGR1806-20 entered a new period of activity in July 2003. An INTEGRAL target of opportunity observation was triggered, and it took place during the waning phase of this period. The observation lasted ~240 ks starting on September 3, and included both "stare" and "dither" modes to optimize IBIS/JEM-X observations and SPI observations, respectively.

At least three weak bursts were detected by IBIS/ISGRI in the 15-100 keV range, with fluences between ~10^-9 and 10^-8 erg cm^-2. Analysis is underway to determine whether the quiescent source associated with SGR1806-20 was detected, and whether a source associated with the possible new SGR, 1808-20, was present. Preliminary results on the continuum and on the possible line spectrum of SGR1806 will be presented.

This work was supported by the NASA INTEGRAL Guest Investigator program.

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