Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Collmar, W."'
Autor:
Lichti, G. G., Bottacini, E., Ajello, M., Charlot, P., Collmar, W., Falcone, A., Horan, D., Huber, S., von Kienlin, A., Lähteenmäki, A., Lindfors, E., Morris, D., Nilsson, K., Petry, D., Rüger, M., Sillanpää, A., Spanier, F., Tornikoski, M.
We report the results of a multi-wavelength campaign on the blazar Mrk 421 during outburst. We observed four strong flares at X-ray energies that were not seen at other wavelengths (partially because of missing data). From the fastest rise in the X-r
Externí odkaz:
http://arxiv.org/abs/0805.2577
Autor:
WEBT Collaboration, Collmar, W., Böttcher, M., Krichbaum, T., Bottacini, E., Burwitz, V., Cucchiara, A., Grupe, D., Gurwell, M., Kretschmar, P., Pottschmidt, K., Bremer, M., Leon, S., Ungerechts, H., Giommi, P., Capalbi, M.
We report first results of a multifrequency campaign from radio to hard X-ray energies of the prominent gamma-ray blazar 3C 279, which was organised around an INTEGRAL ToO observation in January 2006, and triggered on its optical state. The variable
Externí odkaz:
http://arxiv.org/abs/0710.1096
Autor:
Lichti, G. G., Bottacini, E., Charlot, P., Collmar, W., Horan, D., von Kienlin, A., Laehteenmaeki, A., Nilsson, K., Petry, D., Sillanpaeae, A., Tornikoski, M., Weekes, T.
Publikováno v:
AIP Conf.Proc.921:371-372,2007
A ToO observation of the TeV-emitting blazar Mrk 421 with INTEGRAL was triggered in June 2006 by an increase of the RXTE count rate to more than 30 mCrab. The source was then observed with all INTEGRAL instruments with the exception of the spectromet
Externí odkaz:
http://arxiv.org/abs/0704.2338
Publikováno v:
Astrophys.J. 645 (2006) 556-575
We report on the discovery of hard spectral tails for energies above 10 keV in the total and pulsed spectra of anomalous X-ray pulsars 1RXS J1708-4009, 4U 0142+61 and 1E 2259+586 using RXTE PCA (2-60 keV) and HEXTE (15-250 keV) data and INTEGRAL IBIS
Externí odkaz:
http://arxiv.org/abs/astro-ph/0603467
We report on the results of a deep 1.6 Ms INTEGRAL observation of the Cassiopeia region performed from December 2003 to February 2004. Eleven sources were detected with the imager IBIS-ISGRI at energies above 20 keV, including three new hard X-ray so
Externí odkaz:
http://arxiv.org/abs/astro-ph/0601644
We have investigated the MeV behaviour of the \gray blazars 3C~454.3 and CTA 102 by analyzing all COMPTEL observations of this sky region during the complete CGRO mission. Both sources are detected by COMPTEL at the upper COMPTEL energies; although t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0508280
Autor:
Collmar, W., Böttcher, M., Burwitz, V., Courvoisier, T., Komossa, S., Kretschmar, P., Nieppola, E., Nilsson, K., Ojala, T., Pottschmidt, K., Pasanen, M., Pursimo, T., Sillanpää, A., Takalo, L., Tornikoski, M., Ungerechts, H., Valtaoja, E., Walter, R., Webster, R., Whiting, M., Wiik, K., Wong, I.
We report first results of a multifrequency campaign from radio to hard X-ray energies of the prominent gamma-ray blazar 3C 279 during the first year of the INTEGRAL mission. The variable blazar was found at a low activity level, but was detected by
Externí odkaz:
http://arxiv.org/abs/astro-ph/0410302
Publikováno v:
Astron.Astrophys. 421 (2004) 983-990
We investigated the MeV properties of 173 unidentified or only tentatively identified EGRET sources listed in the third EGRET catalogue, by analyzing the simultaneously collected COMPTEL MeV data for each individual source. The sources can generally
Externí odkaz:
http://arxiv.org/abs/astro-ph/0405492
Autor:
Grandi, P., Fiocchi, M., Perola, C. G., Urry, C. M., Maraschi, L., Massaro, E., Matt, G., Preite-Martinez, A., Steinle, H., Collmar, W.
Publikováno v:
Astrophys.J. 593 (2003) 160-168
The radio galaxy Centaurus A was observed by the BeppoSAX satellite five times from 1997 to 2000. From July 6 1999 to August 17 1999, the source was also simultaneously pointed by COMPTEL on-board of the satellite CGRO. Centaurus A has a complex spec
Externí odkaz:
http://arxiv.org/abs/astro-ph/0304244
Publikováno v:
Astron.Astrophys. 396 (2002) 923-928
We report the detection of an unidentified gamma-ray source near the Galactic plane by the COMPTEL experiment aboard the Compton Gamma-Ray Observatory. The source is detected at a significance level of ~ 7.2 sigma in the energy range 1-3 MeV and at ~
Externí odkaz:
http://arxiv.org/abs/astro-ph/0210220