Zobrazeno 1 - 10
of 185
pro vyhledávání: '"Grefenstette, B. W."'
Autor:
Yun, S. B., Grefenstette, B. W., Ludlam, R. M., Brumback, M. C., Buisson, D. J. K., Mastroserio, G., Pike, S. N.
We present the long term analysis of GS 1826-238, a neutron star X-ray binary known as the "Clocked Burster", using data from NuSTAR StrayCats. StrayCats, a catalogue of NuSTAR stray light data, contains data from bright, off-axis X-ray sources that
Externí odkaz:
http://arxiv.org/abs/2212.05243
Autor:
Mastroserio, G., Grefenstette, B. W., Thalhammer, P., Buisson, D. J. K., Brumback, M. C., Ludlam, R. M., Connors, R. M. T., Garcıa, J. A., Grinberg, V., Madsen, K. K., Miyasaka, H., Tomsick, J. A., Wilms, J.
Due to the structure of the NuSTAR telescope, photons at large off-axis (> 1deg) can reach the detectors directly (stray light), without passing through the instrument optics. At these off-axis angles NuSTAR essentially turns into a collimated instru
Externí odkaz:
http://arxiv.org/abs/2209.14325
Autor:
Ludlam, R. M., Grefenstette, B. W., Brumback, M. C., Tomsick, J. A., Buisson, D. J. K., Coughenour, B. M., Mastroserio, G., Wik, D., Krivonos, R., Jaodand, A. D., Madsen, K. K.
We present an updated catalog of StrayCats (a catalog of NuSTAR stray light observations of X-ray sources) that includes nearly 18 additional months of observations. StrayCats v2 has an added 53 sequence IDs, 106 rows, and 3 new identified stray ligh
Externí odkaz:
http://arxiv.org/abs/2206.09930
Autor:
Brumback, McKinley C., Grefenstette, B. W., Buisson, D. J. K., Bachetti, M., Connors, R., Garcia, J. A., Jaodand, A., Krivonos, R., Ludlam, R., Madsen, K. K., Mastroserio, G., Tomsick, J. A., Wik, D.
StrayCats, the catalog of NuSTAR stray light observations, contains data from bright X-ray sources that fall within crowded source regions. These observations offer unique additional data with which to monitor sources like X-ray binaries that show va
Externí odkaz:
http://arxiv.org/abs/2202.11261
Autor:
Walton, D. J., Heida, M., Bachetti, M., Furst, F., Brightman, M., Earnshaw, H., Evans, P. A., Fabian, A. C., Grefenstette, B. W., Harrison, F. A., Israel, G. L., Lansbury, G. B., Middleton, M. J., Pike, S., Rana, V., Roberts, T. P., Castillo, G. A. Rodriguez, Salvaterra, R., Song, X., Stern, D.
We report on the discovery of a new, transient ultraluminous X-ray source (ULX) in the galaxy NGC 7090. This new ULX, which we refer to as NGC 7090 ULX3, was discovered via monitoring with $Swift$ during 2019-20, and to date has exhibited a peak lumi
Externí odkaz:
http://arxiv.org/abs/2011.08870
Autor:
Shaw, A. W., Heinke, C. O., Mukai, K., Tomsick, J. A., Doroshenko, V., Suleimanov, V. F., Buisson, D. J. K., Gandhi, P., Grefenstette, B. W., Hare, J., Jiang, J., Ludlam, R. M., Rana, V., Sivakoff, G. R.
The hard X-ray spectrum of magnetic cataclysmic variables can be modelled to provide a measurement of white dwarf mass. This method is complementary to radial velocity measurements, which depend on the (typically rather uncertain) binary inclination.
Externí odkaz:
http://arxiv.org/abs/2008.09684
Publikováno v:
ApJ, 2020, 889, 23
We present in this paper the hard X-ray view of the pulsar wind nebula in G11.2-0.3 and its central pulsar PSR J1811-1925 as seen by NuSTAR. We complement the data with Chandra for a more complete picture and confirm the existence of a hard, power-la
Externí odkaz:
http://arxiv.org/abs/2002.12775
Autor:
Fabian, A. C., Buisson, D. J, Kosec, P., Reynolds, C. S., Wilkins, D. R., Tomsick, J. A., Walton, D. J., Gandhi, P., Altamirano, D., Arzoumanian, Z., Cackett, E. M., Dyda, S., Garcia, J. A., Gendreau, K. C., Grefenstette, B. W, Harrison, F. A., Homan, J., Kara, E., Ludlam, R. M., Miller, J. M., Steiner, J. F.
The Galactic black hole X-ray binary MAXI J1820+070 had a bright outburst in 2018 when it became the second brightest X-ray source in the Sky. It was too bright for X-ray CCD instruments such as XMM-Newton and Chandra, but was well observed by photon
Externí odkaz:
http://arxiv.org/abs/2002.09691
Autor:
Heida, M., Lau, R. M., Davies, B., Brightman, M., Fürst, F., Grefenstette, B. W., Kennea, J. A., Tramper, F., Walton, D. J., Harrison, F. A.
SN2010da/NGC 300 ULX-1 was first detected as a supernova impostor in May 2010 and was recently discovered to be a pulsating ultraluminous X-ray source. In this letter, we present VLT/X-shooter spectra of this source obtained in October 2018, covering
Externí odkaz:
http://arxiv.org/abs/1909.02171
Autor:
Margutti, Raffaella, Metzger, B. D., Chornock, R., Vurm, I., Roth, N., Grefenstette, B. W., Savchenko, V., Cartier, R., Steiner, J. F., Terreran, G., Migliori, G., Milisavljevic, D., Alexander, K. D., Bietenholz, M., Blanchard, P. K., Bozzo, E., Brethauer, D., Chilingarian, I. V., Coppejans, D. L., Ducci, L., Ferrigno, C., Fong, W., GÖtz, D., Guidorzi, C., Hajela, A., Hurley, K., Kuulkers, E., Laurent, P., Mereghetti, S., Nicholl, M., Patnaude, D., Ubertini, P., Banovetz, J., Bartel, N., Berger, E., Coughlin, E. R., Eftekhari, T., Frederiks, D. D., Kozlova, A. V., Laskar, T., Svinkin, D. S., Drout, M. R., Macfadyen, A., Paterson, K.
We present the first extensive radio to gamma-ray observations of a fast-rising blue optical transient (FBOT), AT2018cow, over its first ~100 days. AT2018cow rose over a few days to a peak luminosity $L_{pk}\sim4\times 10^{44}$ erg/s exceeding those
Externí odkaz:
http://arxiv.org/abs/1810.10720