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4 results on '"Shrader, C. R."'

1. A Search for Gamma-Ray Emission from Variable or Transient Galactic Radio Sources

Author

Shrader, C. R. and Macomb, D. J.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics
Abstract

We describe an ongoing effort using the Fermi Large Area Telescope to search for gamma-ray emission from a source sample derived from published surveys of variable or transient galactic radio sources., Comment: 2012 Fermi Symposium proceedings - eConf C121028

Published
2013
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2. The 1996 Outburst of GRO J1655-40

Author

Hynes, R. I., Haswell, C. A., Fender, R. P., Shrader, C. R., Chen, W., Horne, K., Harlaftis, E. T., O'Brien, K., Hellier, C., and Kemp, J.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences
Abstract

During 1996 the soft-X-ray transient and superluminal jet source GRO J1655-40 was observed in outburst with a multiwavelength campaign including HST, RXTE, CGRO and ground based facilities. Here we focus on a key question raised by the observations: where and how does the outburst optical flux originate? Any model must not only fit the optical spectra, but must account for the observation that X-ray fluxes continued to rise slowly while the optical flux declined, contrary to predictions of standard models for the outburst of SXTs and dwarf novae., 2 pages, LaTeX, including 2 postscript figures. To appear in the proceedings of the 13th NAW on CVs, eds: S. Howell, E. Kuulkers and C. Woodward

Published
1997
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4. Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. V. Variability of the ultraviolet continuum and emission lines of NGC 3783

Author

Reichert, G. A., Rodríguez-Pascual, P. M., Alloin, D., Clavel, J., Crenshaw, D. M., Kriss, G. A., Krolik, J. H., Malkan, M. A., Netzer, H., Peterson, B. M., Wamsteker, W., Altamore, A., Altieri, B., Anderson, K. S., Blackwell Jr, J. H., Boisson, C., Brosch, N., Carone, T. E., Dietrich, M., England, M. N., Evans, I. N., Filippenko, A. V., Gaskell, C. M., Goad, M., Gondhalekar, P. M., Horne, K., Kazanas, D., Kollatschny, W., Koratkar, A. P., Korista, K. T., Macalpine, G. M., Maoz, D., Mazeh, T., Mccollum, B., Miller, H. R., Mendes Oliveira, C., O Brien, P. T., Pastoriza, M. G., Pelat, D., Pérez, E., Perola, G. C., Pogge, R. W., Ptak, R. L., Recondo-González, M. C., Rodríguez-Espinosa, J., Rosenblatt, E. I., Sadun, A. C., Santos-Lléo, M., Shields, J. C., Shrader, C. R., Shull, J. M., Simkin, S. M., Sitko, M. L., Snijders, M. A. J., Sparke, L. S., Giovanna Maria Stirpe, Stoner, R., Storchi-Bergmann, T., Sun, W. -H, Wang, T., Welsh, W. F., White, R. J., Winge, C., and Zheng, W.

Subjects
Galáxia NGC 5548, Seyfert [Galaxies], active [Galaxies], nuclei [Galaxies], Espectros astronômicos, individual (NGC 3783) [Galaxies], Galaxias seyfert, Nucleo galatico, Galáxia NGC 3783, galaxies [Ultraviolet]
Abstract

We report on the results of intensive ultraviolet spectral monitoring of the Seyfert 1 galaxy NGC 3783. The nucleus of NGC 3783 was observed with the International Ultraviolet Explorer satellite on a regular basis for a total of 7 months, once every 4 days for the first 172 days and once every other day for the final 50 days. Significant variability was observed in both continuum and emission-line ftuxes. The light curves for the con­ tinuum ftuxes exhibited two well-defined local mínima or "dips," the first lasting

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