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82 papers · 2 filters
An image-based search for pulsars among Fermi unassociated LAT sources
D. A. Frail, P. S. Ray, K. P. Mooley +9
We describe an image-based method that uses two radio criteria, compactness and spectral index, to identify promising pulsar candidates among Fermi Large Area Telescope (LAT) unass…
X-ray Brightening and UV Fading of Tidal Disruption Event ASASSN-15oi
S. Gezari, S. B. Cenko, I. Arcavi
We present late-time observations by Swift and XMM-Newton of the tidal disruption event (TDE) ASASSN-15oi that reveal that the source brightened in the X-rays by a factor of $\sim1…
The Sleeping Monster: NuSTAR observations of SGR 1806-20, 11 years after the Giant Flare
George Younes, Matthew G. Baring, Chryssa Kouveliotou +5
We report the analysis of 5 NuSTAR observations of SGR 1806-20 spread over a year from April 2015 to April 2016, more than 11 years following its Giant Flare (GF) of 2004. The sour…
A possible phase dependent absorption feature in the transient X-ray pulsar SAX J2103.5+4545
McKinley C. Brumback, Ryan C. Hickox, Felix S. Fürst +5
We present an X-ray spectral and timing analysis of two observations of the transient Be X-ray binary SAX J2103.5+4545 during its April 2016 outburst, which was characteri…
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…
Exploring the Variability of the Flat Spectrum Radio Source 1633+382. I. Phenomenology of the Light Curves
Juan-Carlos Algaba, Sang-Sung Lee, Dae-Won Kim +15
We present multi-frequency simultaneous VLBI radio observations of the flat spectrum radio quasar 1633+382 (4C~38.41) as part of the interferometric monitoring of gamma-ray bright…