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2014ApJ...794...82B - Astrophys. J., 794, 82 (2014/October-2)

Search for GeV gamma-ray bursts with the ARGO-YBJ detector: summary of eight years of observations.

BARTOLI B., BERNARDINI P., BI X.J., BRANCHINI P., BUDANO A., CAMARRI P., CAO Z., CARDARELLI R., CATALANOTTI S., CHEN S.Z., CHEN T.L., CRETI P., CUI S.W., DAI B.Z., D'AMONE A., DANZENGLUOBU, DE MITRI I., D'ETTORRE PIAZZOLI B., DI GIROLAMO T., DI SCIASCIO G., FENG C.F., FENG Z., FENG Z., GOU Q.B., GUO Y.Q., HE H.H., HU H., HU H., IACOVACCI M., IUPPA R., JIA H.Y., LABACIREN, LI H.J., LIGUORI G., LIU C., LIU J., LIU M.Y., LU H., MA L.L., MA X.H., MANCARELLA G., MARI S.M., MARSELLA G., MARTELLO D., MASTROIANNI S., MONTINI P., NING C.C., PANAREO M., PERRONE L., PISTILLI P., RUGGIERI F., SALVINI P., SANTONICO R., SHEN P.R., SHENG X.D., SHI F., SURDO A., TAN Y.H., VALLANIA P., VERNETTO S., VIGORITO C., WANG H., WU C.Y., WU H.R., XUE L., YANG Q.Y., YANG X.C., YAO Z.G., YUAN A.F., ZHA M., ZHANG H.M., ZHANG L., ZHANG X.Y., ZHANG Y., ZHAO J., ZHAXICIREN, ZHAXISANGZHU, ZHOU X.X., ZHU F.R., ZHU Q.Q., ZIZZI G. (The ARGO-YBJ Collaboration)

Abstract (from CDS):

The search for gamma-ray burst (GRB) emission in the energy range of 1-100 GeV in coincidence with the satellite detection has been carried out using the Astrophysical Radiation with Ground-based Observatory at YangBaJing (ARGO-YBJ) experiment. The high-altitude location (4300 m a.s.l.), the large active surface (∼6700 m2 of Resistive Plate Chambers), the wide field of view (∼2 sr, limited only by the atmospheric absorption), and the high duty cycle (>86%) make the ARGO-YBJ experiment particularly suitable to detect short and unexpected events like GRBs. With the scaler mode technique, i.e., counting all the particles hitting the detector with no measurement of the primary energy and arrival direction, the minimum threshold of ∼1 GeV can be reached, overlapping the direct measurements carried out by satellites. During the experiment lifetime from 2004 December 17 to 2013 February 7, a total of 206 GRBs occurring within the ARGO-YBJ field of view (zenith angle θ ≤ 45°) have been analyzed. This is the largest sample of GRBs investigated with a ground-based detector. Two light curve models have been assumed and since in both cases no significant excess has been found, the corresponding fluence upper limits in the 1-100 GeV energy region have been derived, with values as low as 10–5 erg/cm2. The analysis of a subset of 24 GRBs with known redshift has been used to constrain the fluence extrapolation to the GeV region together with possible cutoffs under different assumptions on the spectrum.

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Journal keyword(s): astroparticle physics - gamma-ray burst: general

VizieR on-line data: <Available at CDS (J/ApJ/794/82): table2.dat>

Simbad objects: 205

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