Fermi-lat Study of Gamma-ray Emission in the Direction of Supernova Remnant W49b

  title={Fermi-lat Study of Gamma-ray Emission in the Direction of Supernova Remnant W49b},
  author={M. A CKERMANN and M. A JELLO and L. B ALDINI and J. B ALLET and G. B ARBIELLINI and D. B ASTIERI and K. B ECHTOL and R. B ELLAZZINI and E. B ONAMENTE and A. W. B ORGLAND and A. B OUVIER and J. B REGEON and A. B REZ and P. Ruel and R. B UEHLER and S. B USON and G. A. C ALIANDRO and R. A. C AMERON and P. A. C ARAVEO and J. M. C ASANDJIAN and C. C ECCHI and {\"O}. Ç ELIK and Choon Heung and J Hiang and S. C IPRINI and J. C OHEN-T ANUGI and J. C ONRAD and C. Ermer and F. DE P ALMA and Svitlana Igel and E. DO C OUTO E S ILVA and P{\'e}ter Rell and D. D UMORA and C. F AVUZZI and S. F UNK and P. F USCO and Francesco Argano and N. G EHRELS and N. G IGLIETTO and F. G IORDANO and M. G IROLETTI and T. G LANZMAN and G. G ODFREY and I. A. G RENIER and M.-H. G RONDIN and J. E. G ROVE and L. G UILLEMOT and S. G UIRIEC and D. H ADASCH and Y. H ANABATA and A. K. H ARDING and M. H AYASHIDA and E. H AYS and R. E. H UGHES and M. S. J ACKSON and G. J {\'O}HANNESSON and A. S. J OHNSON and W. N. J OHNSON and T. K AMAE and H. K ATAGIRI and J. K ATAOKA and Jun Atsuta and J. K N{\"O}DLSEDER and Mikhail Uss and J. L ANDE and L. L ATRONICO and Marieke Oumard and F. L ONGO and F. L OPARCO and M. N. L OVELLETTE and P. L UBRANO and A. M AKEEV and M. N. M AZZIOTTA and Takashi Izuno and C. M ONTE and M. E. M ONZANI and A Orselli and I. V. M OSKALENKO and S. M URGIA and J. P. N ORRIS and T. O HSUGI and A. O KUMURA and N. O MODEI and E. O RLANDO and J. F. O RMES and V. P ELASSA and F. P IRON and Shizuo Aino and Robert R. Ando and M. R AZZANO and A. R EIMER and O. R EIMER and T. R EPOSEUR and J. R IPKEN and H. F.-W. S ADROZINSKI and P. M. S AZ P ARKINSON and C. Gro and E. J. S ISKIND and D Mith and Pierre-Olivier Pinelli and M. S. S TRICKMAN and D. J. S USON and Hisao Ajima and H. T AKAHASHI and T. T AKAHASHI and T. T ANAKA and L. T IBALDO and O. T IBOLLA and D. F. T ORRES and Giacomo Osti and A. T RAMACERE and Y. U CHIYAMA and Tal Sher and J. V ANDENBROUCKE and V. V ASILEIOU and V. V ITALE and A. P. W AITE},
  • M. A CKERMANN, M. A JELLO, +114 authors A. P. W AITE
  • Published 2010
We present an analysis of the gamma-ray data obtained with th e Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope in the direction of SNR W49B (G43.3 −0.2). A bright unresolved gammaray source detected at a significance of 38 σ is found to coincide with SNR W49B. The energy spectrum in the 0.2–200 GeV range gradually steepens toward high energi es. The luminosity is estimated to be 1 .5× 1036 (D/8 kpc)2 erg s−1 in this energy range. There is no indication that the gamma-r… CONTINUE READING