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SuperAGILE limits on the hard X-ray flux of the AGILE bright gamma-ray transient in the Cygnus field

ATEL # 1320; F. Lazzarotto, Y. Evangelista, I. Donnarumma, L. Pacciani,E. Costa, E. Del Monte, M. Feroci, I. Lapshov, M. Rapisarda, P. Soffitta, A. Argan, A. Trois , M. Tavani, G. Pucella, F. D'Ammando, V. Vittorini (INAF/IASF Roma), A. Chen, S. Vercellone, A. Giuliani, S. Mereghetti, A. Pellizzoni, F. Perotti, F. Fornari, M. Fiorini, P. Caraveo (INAF/IASF Milano), A. Bulgarelli, F. Gianotti, M. Trifoglio, G. Di Cocco, C. Labanti, F. Fuschino, M. Marisaldi, M. Galli, (INAF/IASF Bologna), G. Barbiellini, F. Longo, E. Vallazza (INFN Trieste), P. Picozza, A. Morselli (INFN Roma-2), M. Prest (Universita` dell'Insubria), P. Lipari, D. Zanello (INFN Roma-1), F. Mauri (INFN Pavia) and C. Pittori, F. Verrecchia, B. Preger, L.A. Antonelli, P. Giommi (ASDC) and L. Salotti (ASI)
on 4 Dec 2007; 17:35 UT
Password Certification: Stefano Vercellone (

Subjects: X-ray, Gamma Ray, Transients

We analyzed the hard X-ray (20-60 keV) data collected by SuperAGILE between 2007-11-09 and 2007-11-23 from the sky region including the bright and rapid gamma-ray transient detected by the AGILE-GRID (Chen et al., ATel #1308). Due to the satellite attitude, one of the two SuperAGILE coordinates is confused by the source EXO 2030+375 and we considered safer to exclude it from this analysis. Using the other coordinate only (half of the SuperAGILE effective area), we do not find any significant X-ray emission at the position of the gamma-ray transient, neither on the orbital, daily or weekly timescales. The SuperAGILE 3-sigma upper limits are 40 mCrab (orbital), 21 mCrab (daily) and 12 mCrab (weekly), including a significant systematics at exposures of one day (50%) and one week (60%), due to the yet preliminary status of the experiment in-flight calibrations.

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R. E. Rutledge , Editor
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