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26 papers · 2 filters
Simultaneous multiwavelength observations of V404 Cygni during its 2015 June outburst decay strengthen the case for an extremely energetic jet-base
Dipankar Maitra, John F. Scarpaci, Victoria Grinberg +4
We present results of multiband optical photometry of the black hole X-ray binary system V404 Cygni obtained using Wheaton College Observatory's 0.3m telescope, along with strictly…
On the Progenitor of Binary Neutron Star Merger GW170817
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1095
On 2017 August 17 the merger of two compact objects with masses consistent with two neutron stars was discovered through gravitational-wave (GW170817), gamma-ray (GRB 170817A), and…
Accretion disks and coronae in the X-ray flashlight
N. Degenaar, D. R. Ballantyne, T. Belloni +10
Plasma accreted onto the surface of a neutron star can ignite due to unstable thermonuclear burning and produce a bright flash of X-ray emission called a Type-I X-ray burst. Such e…
An excess of low-mass X-ray binaries in the outer halo of NGC 4472
Lennart M. van Haaften, Thomas J. Maccarone, Paul H. Sell +4
We present new Chandra observations of the outer halo of the giant elliptical galaxy NGC 4472 (M49) in the Virgo Cluster. The data extend to 130 kpc (28'), and have a combined expo…
GW170608: Observation of a 19-solar-mass Binary Black Hole Coalescence
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1101
On June 8, 2017 at 02:01:16.49 UTC, a gravitational-wave signal from the merger of two stellar-mass black holes was observed by the two Advanced LIGO detectors with a network signa…
2FGL J0846.0+2820: A new neutron star binary with a giant secondary and variable -ray emission
Samuel J. Swihart, Jay Strader, Tyrel J. Johnson +11
We present optical photometric and spectroscopic observations of the likely stellar counterpart to the unassociated \emph{Fermi}-Large Area Telescope (LAT) -ray source 2FGL J084…