Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Healey, S. P."'
Autor:
Sokolovsky, K. V., Schinzel, F. K., Tanaka, Y. T., Abolmasov, P. K., Angelakis, E., Bulgarelli, A., Carrasco, L., Cenko, S. B., Cheung, C. C., Clubb, K. I., D'Ammando, F., Escande, L., Fegan, S. J., Filippenko, A. V., Finke, J. D., Fuhrmann, L., Fukazawa, Y., Hays, E., Healey, S. E., Ikejiri, Y., Itoh, R., Kawabata, K. S., Komatsu, T., Kovalev, Yu. A., Kovalev, Y. Y., Krichbaum, T. P., Larsson, S., Lister, M. L., Lott, B., Max-Moerbeck, W., Nestoras, I., Pittori, C., Pursimo, T., Pushkarev, A. B., Readhead, A. C. S., Recillas, E., Richards, J. L., Riquelme, D., Romani, R. W., Sakimoto, K., Sasada, M., Schmidt, R., Shaw, M. S., Sievers, A., Thompson, D. J., Uemura, M., Ungerechts, H., Vercellone, S., Verrecchia, F., Yamanaka, M., Yoshida, M., Zensus, J. A.
Publikováno v:
Astronomy & Astrophysics 565 (2014) A26
Previously unremarkable, the extragalactic radio source GB 1310+487 showed a gamma-ray flare on 2009 November 18, reaching a daily flux of ~10^-6 photons/cm^2/s at energies E>100 MeV and becoming one of the brightest GeV sources for about two weeks.
Externí odkaz:
http://arxiv.org/abs/1401.2151
Autor:
Ajello, M., Romani, R. W., Gasparrini, D., Shaw, M. S., Bolmer, J., Cotter, G., Finke, J., Greiner, J., Healey, S. E., King, O., Max-Moerbeck, W., Michelson, P. F., Potter, W. J., Rau, A., Readhead, A. C. S., Richards, J. L., Schady, P.
Fermi has provided the largest sample of gamma-ray selected blazars to date. In this work we use a uniformly selected set of 211 BL Lacertae (BL Lac) objects detected by it Fermi during its first year of operation. We have obtained redshift constrain
Externí odkaz:
http://arxiv.org/abs/1310.0006
Autor:
Pavlidou, V., Richards, J. L., Max-Moerbeck, W., King, O. G., Pearson, T. J., Readhead, A. C. S., Reeves, R., Stevenson, M. A., Angelakis, E., Fuhrmann, L., Zensus, J. A., Giroletti, M., Reimer, A., Healey, S. E., Romani, R. W., Shaw, M. S.
Whether a correlation exists between the radio and gamma-ray flux densities of blazars is a long-standing question, and one that is difficult to answer confidently because of various observational biases which may either dilute or apparently enhance
Externí odkaz:
http://arxiv.org/abs/1204.0790
Autor:
Ackermann, M., Ajello, M., Allafort, A., Angelakis, E., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bouvier, A., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Cannon, A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Charles, E., Chekhtman, A., Cheung, C. C., Ciprini, S., Claus, R., Cohen-Tanugi, J., Cutini, S., de Palma, F., Dermer, C. D., Silva, E. do Couto e, Drell, P. S., Dubois, R., Dumora, D., Escande, L., Favuzzi, C., Fegan, S. J., Focke, W. B., Fortin, P., Frailis, M., Fuhrmann, L., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Giglietto, N., Giommi, P., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grandi, P., Grenier, I. A., Guiriec, S., Hadasch, D., Hayashida, M., Hays, E., Healey, S. E., J, G., Johnson, A. S., Kamae, T., Katagiri, H., Kataoka, J., Kn, J., Kuss, M., Lande, J., Lee, S. -H., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Makeev, A., Max-Moerbeck, W., Mazziotta, M. N., McEnery, J. E., Mehault, J., Michelson, P. F., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann-Godo, M., Nishino, S., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orlando, E., Ormes, J. F., Ozaki, M., Paneque, D., Pavlidou, V., Pelassa, V., Pepe, M., Pesce-Rollins, M., Pierbattista, M., Piron, F., Porter, T. A., Rain, S., Razzano, M., Readhead, A., Reimer, A., Reimer, O., Richards, J. L., Romani, R. W., Sadrozinski, H. F. -W., Scargle, J. D., Sgr, C., Siskind, E. J., Smith, P. D., Spandre, G., Spinelli, P., Strickman, M. S., Suson, D. J., Takahashi, H., Tanaka, T., Taylor, G. B., Thayer, J. G., Thayer, J. B., Thompson, D. J., Torres, D. F., Tosti, G., Tramacere, A., Troja, E., Vandenbroucke, J., Vianello, G., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Yang, Z., Ziegler, M.
We present a detailed statistical analysis of the correlation between radio and gamma-ray emission of the Active Galactic Nuclei (AGN) detected by Fermi during its first year of operation, with the largest datasets ever used for this purpose. We use
Externí odkaz:
http://arxiv.org/abs/1108.0501
Autor:
Linford, J. D., Taylor, G. B., Romani, R., Healey, S. E., Helmboldt, J. F., Readhead, A. C. S., Reeves, R., Richards, J., Cotter, G.
The radio properties of blazars detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope have been observed as part of the VLBA Imaging and Polarimetry Survey (VIPS). This large, flux-limited sample of active galactic n
Externí odkaz:
http://arxiv.org/abs/1010.5812
Autor:
Vandenbroucke, J., Buehler, R., Ajello, M., Bechtol, K., Bellini, A., Bolte, M., Cheung, C. C., Civano, F., Donato, D., Fuhrmann, L., Funk, S., Healey, S. E., Hill, A. B., Knigge, C., Madejski, G. M., Romani, R. W., Santander-García, M., Shaw, M. S., Steeghs, D., Torres, M. A. P., Van Etten, A., Williams, K. A.
Publikováno v:
Astrophysical Journal Letters 718 (2010) L166-L170
The \emph{Fermi} Large Area Telescope (LAT) discovered a new gamma-ray source near the Galactic plane, \object{Fermi J0109+6134}, when it flared brightly in 2010 February. The low Galactic latitude (b =-1.2\degr) indicated that the source could be lo
Externí odkaz:
http://arxiv.org/abs/1004.1413
Autor:
Tremblay, S. E., Taylor, G. B., Richards, J. L., Readhead, A. C. S., Helmboldt, J. F., Romani, R. W., Healey, S. E.
We present multifrequency Very Long Baseline Array (VLBA) observations of J16021+3326. These observations, along with variability data obtained from the Owens Valley Radio Observatory (OVRO) candidate gamma-ray blazar monitoring program, clearly indi
Externí odkaz:
http://arxiv.org/abs/1001.5423
Autor:
Richards, J. L., Max-Moerbeck, W., Pavlidou, V., Pearson, T. J., Readhead, A. C. S., Stevenson, M. A., Healey, S. E., Romani, R. W., Shaw, M. S., Fuhrmann, L., Angelakis, E., Zensus, J. A., Grainge, K., Taylor, G. B.
We present results from the first two years of our fast-cadence 15 GHz gamma-ray blazar monitoring program, part of the F-GAMMA radio monitoring project. Our sample includes the 1158 blazars north of -20 degrees declination from the Candidate Gamma-R
Externí odkaz:
http://arxiv.org/abs/0912.3780
Autor:
Abdo, A. A., Ackermann, M., Ajello, M., 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., Bonamente, E., Borgland, A., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Celik, O., Charles, E., Chaty, S., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Colafrancesco, S., Cominsky, L. R., Conrad, J., Costamante, L., Cutini, S., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Silva, E. do Couto e, Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Fegan, S. J., Focke, W. B., Fortin, P., Frailis, M., Fuhrmann, L., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giommi, P., Giordano, F., Glanzman, T., Godfrey, G., Grenier, I. A., Grove, J. E., Guillemot, L., Guiriec, S., Hadasch, D., Hanabata, Y., Harding, A. K., Hayashida, M., Hays, E., Healey, S. E., Horan, D., Hughes, R. E., Itoh, R., Jackson, M. S., Johannesson, G., Johnson, A. S., Johnson, W. N., Kadler, M., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kerr, M., Knodlseder, J., Kocian, M. L., Kuss, M., Lande, J., Latronico, L., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Max-Moerbeck, W., Mazziotta, M. N., McConville, W., McEnery, J. E., Meurer, C., Michelson, P. F.
Publikováno v:
Astrophys.J.716:30-70,2010
(Abridged) We have conducted a detailed investigation of the broad-band spectral properties of the \gamma-ray selected blazars of the Fermi LAT Bright AGN Sample (LBAS). By combining our accurately estimated Fermi gamma-ray spectra with Swift, radio,
Externí odkaz:
http://arxiv.org/abs/0912.2040
Autor:
Taylor, G. B., Healey, S. E., Helmboldt, J. F., Tremblay, S., Fassnacht, C. D., Walker, R. C., Sjouwerman, L. O., Pearson, T. J., Readhead, A. C. S., Weintraub, L., Gehrels, N., Romani, R. W., Michelson, P. F., Blandford, R. D., Cotter, G.
We examine the radio properties of EGRET-detected blazars observed as part of the VLBA Imaging and Polarimetry Survey (VIPS). VIPS has a flux limit roughly an order of magnitude below the MOJAVE survey and most other samples that have been used to st
Externí odkaz:
http://arxiv.org/abs/0709.0968