1. FERMI/LARGE AREA TELESCOPE DISCOVERY OF GAMMA-RAY EMISSION FROM THE FLAT-SPECTRUM RADIO QUASAR PKS 1454-354
- Author
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Abdo1, A. A., Ackermann2, M., Atwood3, W. B., Axelsson4, M., 5, Baldini6, L., Ballet7, J., Barbiellini8, G., 9, Bastieri10, D., Baughman12, B. M., Bechtol2, K., Bellazzini6, R., Berenji2, B., Blandford2, R. D., Bloom2, E. D., Bogaert13, G., Bonamente, Emanuele, Borgland2, A. W., Bregeon6, J., Brez6, A., Brigida16, M., Bruel13, P., Burnett18, T. H., Caliandro16, G. A., Cameron2, R. A., Caraveo19, P. A., Casandjian7, J. M., Cavazzuti20, E., Cecchi, Claudia, Charles2, E., Chekhtman1, A., Cheung22, C. C., Chiang2, J., Ciprini14, S., Claus2, R., Cohen Tanugi23, J., Colafrancesco20, S., Conrad4, J., 25, 24, Costamante2, L., Cutini20, S., Dermer1, C. D., de Angelis26, A., de Palma16, F., Digel2, S. W., Silva2, E. do Couto e., Drell2, P. S., Dubois2, R., Dumora27, D., Edmonds2, Y., Farnier23, C., Favuzzi16, C., Ferrara22, E. C., Fleury13, P., Focke2, W. B., Foschini29, L., Frailis26, M., Fuhrmann30, L., Fukazawa31, Y., Funk2, S., Fusco16, P., Gargano17, F., Gasparrini20, D., Gehrels22, N., Germani14, S., Giebels13, B., Giglietto16, N., Giordano16, F., Giroletti33, M., Glanzman2, T., Godfrey2, G., Grenier7, I. A., Grondin27, M. H., Grove1, J. E., Guillemot27, L., Guiriec23, S., Harding22, A. K., Hartman22, R. C., Hayashida2, M., Hays22, E., Healey2, S. E., Hughes12, R. E., Jóhannesson2, G., Johnson2, A. S., Johnson3, R. P., Johnson1, W. N., Kadler34, M., 36, 35, Kamae2, T., Katagiri31, H., Kataoka38, J., Kawai39, N., Kerr18, M., Knödlseder41, J., Kocian2, M. L., Kuehn12, F., Kuss6, M., Latronico6, L., Lee2, S. H., Lemoine Goumard27, M., Longo8, F., Loparco16, F., Lott27, B., Lovellette1, M. N., Lubrano14, P., Madejski2, G. M., Makeev1, A., Marelli19, M., Mazziotta17, M. N., Mcenery22, J. E., Mcglynn4, S., Meurer4, C., Michelson2, P. F., Mitthumsiri2, W., Mizuno31, T., Moiseev35, A. A., Monte16, C., Monzani2, M. E., Morselli42, A., Moskalenko2, I. V., Murgia2, S., Nolan2, P. L., Nuss23, E., Ohno43, M., Ohsugi31, T., Ojha44, R., Omodei6, N., Orlando45, E., Ormes46, J. F., Paneque2, D., Panetta2, J. H., Parent27, D., Pepe14, M., Pesce Rollins6, M., Piron23, F., Porter3, T. A., Rainò16, S., Rando10, R., Razzano6, M., Reimer2, A., Reimer2, O., Reposeur27, T., Reyes47, L. C., Ritz22, S., Rochester2, L. S., Rodriguez48, A. Y., Romani2, R. W., Roth18, M., Ryde4, F., Sadrozinski3, H. F. W., Sambruna22, R., Sanchez13, D., Sander12, A., Saz Parkinson3, P. M., Sgrò6, C., Shaw2, M. S., Siskind49, E. J., Smith27, D. A., Smith12, P. D., Spandre6, G., Spinelli16, P., Starck7, J. L., Strickman1, M. S., Suson50, D. J., Tajima2, H., Takahashi31, H., Tanaka2, T., Thayer2, J. B., Thayer2, J. G., Thompson22, D. J., Tibaldo10, L., Tibolla51, O., Torres52, D. F., Tosti, Gino, Tramacere2, A., Usher2, T. L., Vilchez41, N., Vitale42, V., Waite2, A. P., Wang2, P., Winer12, B. L., Wood1, K. S., Ylinen4, T., 55, 24, Ziegler3 and, M., Edwards56, P. G., Chester57, M. M., Burrows57, D. N., Hauser58, M., Wagner58, S., Abdo, A. A., Ackermann, M., Atwood, W. B., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Baughman, B. M., Bechtol, K., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bogaert, G., Bonamente, E., Borgland, A. W., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Burnett, T. H., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Charles, E., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen Tanugi, J., Colafrancesco, S., Conrad, J., Costamante, L., Cutini, S., Dermer, C. D., Angelis, A. d., Palma, F. d., Digel, S. W., Silva, E. D. E., Drell, P. S., Dubois, R., Dumora, D., Edmonds, Y., Farnier, C., Favuzzi, C., Ferrara, E. C., Fleury, P., Focke, W. B., Foschini, L., Frailis, M., Fuhrmann, L., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Grondin, M. H., Grove, J. E., Guillemot, L., Guiriec, S., Harding, A. K., Hartman, R. C., Hayashida, M., Hays, E., Healey, S. E., Hughes, R. E., Johannesson, G., Johnson, A. S., Johnson, R. P., Johnson, W. N., Kadler, M., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kerr, M., Knodlseder, J., Kocian, M. L., Kuehn, F., Kuss, M., Latronico, L., Lee, S. H., Lemoine Goumard, M., Longo, Francesco, Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Marelli, M., Mazziotta, M. N., Mcenery, J. E., Mcglynn, S., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nolan, P. L., Nuss, E., Ohno, M., Ohsugi, T., Ojha, R., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pepe, M., Pesce Rollins, M., Piron, F., Porter, T. A., Raino, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Reyes, L. C., Ritz, S., Rochester, L. S., Rodriguez, A. Y., Romani, R. W., Roth, M., Ryde, F., Sadrozinski, H. F. W., Sambruna, R., Sanchez, D., Sander, A., Parkinson, P. M. S., Sgro, C., Shaw, M. S., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Starck, J. L., Strickman, M. S., Suson, D. J., Tajima, H., Takahashi, H., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Tibolla, O., Torres, D. F., Tosti, G., Tramacere, A., Usher, T. L., Vilchez, N., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Ylinen, T., Ziegler, M., Edwards, P. G., Chester, M. M., Burrows, D. N., Hauser, M., and Wagner, S.
- Subjects
High Energy Gamma-ray Astronomy ,Fermi satellite ,Active Galactic Nuclei ,Astrophysics::High Energy Astrophysical Phenomena ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Galaxies: active ,Gamma rays: observations ,Quasars: individual (PKS 1454-354) ,01 natural sciences ,Optical telescope ,law.invention ,Telescope ,Spitzer Space Telescope ,law ,0103 physical sciences ,Egret ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Physics ,biology ,010308 nuclear & particles physics ,Gamma ray ,quasars: individual: PKS 1454–354 ,Astronomy and Astrophysics ,Quasar ,biology.organism_classification ,Space and Planetary Science ,Flare ,Fermi Gamma-ray Space Telescope - Abstract
We report the discovery by the Large Area Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope of high-energy γ-ray (GeV) emission from the flat-spectrum radio quasar PKS 1454-354 (z = 1.424). On 2008 September 4, the source rose to a peak flux of (3.5 ± 0.7) × 10-6 ph cm-2 s-1 (E > 100 MeV) on a timescale of hours and then slowly dropped over the following 2 days. No significant spectral changes occurred during the flare. Fermi/LAT observations also showed that PKS 1454-354 is the most probable counterpart of the unidentified EGRET source 3EG J1500-3509. Multiwavelength measurements performed during the following days (7 September with Swift; 6-7 September with the ground-based optical telescope Automated Telescope for Optical Monitoring; 13 September with the Australia Telescope Compact Array) resulted in radio, optical, UV, and X-ray fluxes greater than archival data, confirming the activity of PKS 1454-354.
- Published
- 2009