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2005ApJ...633.1005A - Astrophys. J., 633, 1005-1012 (2005/November-2)

A Northern Sky Survey for steady tera-electron volt gamma-ray point sources using the Tibet air shower array.

AMENOMORI M., AYABE S., CHEN D., CUI S.W., DANZENGLUOBU S.W., DING L.K., DING X.H., FENG C.F., FENG Z.Y., GAO X.Y., GENG Q.X., GUO H.W., HE H.H., HE M., HIBINO K., HOTTA N., HU H., HU H.B., HUANG J., HUANG Q., JIA H.Y., KAJINO F., KASAHARA K., KATAYOSE Y., KATO C., KAWATA K., LABACIREN K., LE G.M., LI J.Y., LU H., LU S.L., MENG X.R., MIZUTANI K., MU J., MUNAKATA K., NAGAI A., NANJO H., NISHIZAWA M., OHNISHI M., OHTA I., ONUMA H., OUCHI T., OZAWA S., REN J.R., SAITO T., SAKATA M., SASAKI T., SHIBATA M., SHIOMI A., SHIRAI T., SUGIMOTO H., TAKASHIMA M., TAKITA M., TAN Y.H., TATEYAMA N., TORII S., TSUCHIYA H., UDO S., UTSUGI T., WANG H., WANG X., WANG Y.G., WU H.R., XUE L., YAMAMOTO Y., YAN C.T., YANG X.C., YASUE S., YE Z.H., YU G.C., YUAN A.F., YUDA T., ZHANG H.M., ZHANG J.L., ZHANG N.J., ZHANG X.Y., ZHANG Y., ZHANG Y., ZHAXISANGZHU Y., ZHOU X.X. (The Tibet AS{gamma} Collaboration)

Abstract (from CDS):

Result. of a steady TeV γ-ray point-source search using data taken from the Tibet HD (1997 February-1999 September) and Tibet III (1999 November-2001 October) arrays are presented. From 0° to 60° in declination, significant excesses from the well-known steady source Crab Nebula and the high state of the flare-type source Markarian 421 are observed. Because the levels of significance from other positions are not sufficiently high, 90% confidence level upper limits on the flux are set assuming different power-law spectra. To allow cross-checking, two independently developed analyses are used in this work.

Abstract Copyright: ∼

Journal keyword(s): Gamma Rays: Observations - Surveys

Simbad objects: 4

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