An updated list of AGILE bright gamma-ray sources and their variability in pointing mode
Abstract
We present a variability study of a sample of bright gamma-ray (30 MeV -- 50 GeV) sources. This sample is an extension of the first AGILE catalogue of gamma-ray sources (1AGL), obtained using the complete set of AGILE observations in pointing mode performed during a 2.3 year period from July 9, 2007 until October 30, 2009. The dataset of AGILE pointed observations covers a long time interval and its gamma-ray data archive is useful for monitoring studies of medium-to-high brightness gamma-ray sources. In the analysis reported here, we used data obtained with an improved event filter that covers a wider field of view, on a much larger (about 27.5 months) dataset, integrating data on observation block time scales, which mostly range from a few days to thirty days. The data processing resulted in a better characterized source list than 1AGL was, and includes 54 sources, 7 of which are new high galactic latitude (|BII| >= 5) sources, 8 are new sources on the galactic plane, and 20 sources from the previous catalogue with revised positions. Eight 1AGL sources (2 high-latitude and 6 on the galactic plane) were not detected in the final processing either because of low OB exposure and/or due to their position in complex galactic regions. We report the results in a catalogue of all the detections obtained in each single OB, including the variability results for each of these sources. In particular, we found that 12 sources out of 42 or 11 out of 53 are variable, depending on the variability index used, where 42 and 53 are the number of sources for which these indices could be calculated. Seven of the 11 variable sources are blazars, the others are Crab pulsar+nebula, LS I +61{\deg}303, Cyg X-3, and 1AGLR J2021+4030.
Keywords
Cite
@article{arxiv.1310.4029,
title = {An updated list of AGILE bright gamma-ray sources and their variability in pointing mode},
author = {F. Verrecchia and C. Pittori and A. W. Chen and A. Bulgarelli and M. Tavani and F. Lucarelli and P. Giommi and S. Vercellone and A. Pellizzoni and A. Giuliani and F. Longo and G. Barbiellini and M. Trifoglio and F. Gianotti and A. Argan and L. A. Antonelli and P. Caraveo and M. Cardillo and P. W. Cattaneo and V. Cocco and S. Colafrancesco and T. Contessi and E. Costa and E. Del Monte and G. De Paris and G. Di Cocco and G. Di Persio and I. Donnarumma and Y. Evangelista and G. Fanari and M. Feroci and A. Ferrari and M. Fiorini and F. Fornari and F. Fuschino and T. Froysland and M. Frutti and M. Galli and C. Labanti and I. Lapshov and F. Lazzarotto and F. Liello and P. Lipari and E. Mattaini and M. Marisaldi and M. Mastropietro and A. Mauri and F. Mauri and S. Mereghetti and E. Morelli and E. Moretti and A. Morselli and L. Pacciani and F. Perotti and G. Piano and P. Picozza and M. Pilia and C. Pontoni and G. Porrovecchio and M. Prest and R. Primavera and G. Pucella and M. Rapisarda and A. Rappoldi and E. Rossi and A. Rubini and S. Sabatini and P. Santolamazza and P. Soffitta and S. Stellato and E. Striani and F. Tamburelli and A. Traci and A. Trois and E. Vallazza and V. Vittorini and D. Zanello and L. Salotti and G. Valentini},
journal= {arXiv preprint arXiv:1310.4029},
year = {2013}
}
Comments
30 pages, 12 figures