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27 papers · 2 filters
Observations of Radio Giant Pulses with GAVRT
Glenn Jones
Radio giant pulses provide a unique opportunity to study the pulsar radio emission mechanism in exquisite detail. Previous studies have revealed a wide range of properties and phen…
A Luminous X-ray Flare From The Nucleus of The Dormant Bulgeless Spiral Galaxy NGC 247
Hua Feng, Luis C. Ho, Philip Kaaret +4
NGC 247 is a nearby late-type bulgeless spiral galaxy that contains an inactive nucleus. We report a serendipitous discovery of an X-ray flare from the galaxy center with a luminos…
The Destruction of the Circumstellar Ring of SN 1987A
Claes Fransson, Josefin Larsson, Katia Migotto +23
We present imaging and spectroscopic observations with HST and VLT of the ring of SN 1987A from 1994 to 2014. After an almost exponential increase of the shocked emission from the…
Deep NuSTAR and Swift Monitoring Observations of the Magnetar 1E 1841-045
Hongjun An, Robert F. Archibald, Romain Hascoet +15
We report on a 350-ks NuSTAR observation of the magnetar 1E 1841-045 taken in 2013 September. During the observation, NuSTAR detected six bursts of short duration, with …
Distorted cyclotron line profile in Cep X-4 as observed by NuSTAR
F. Fuerst, K. Pottschmidt, H. Miyasaka +16
We present spectral analysis of NuSTAR and Swift observations of Cep X-4 during its outburst in 2014. We observed the source once during the peak of the outburst and once during th…
Broadband X-ray Properties of the Gamma-ray Binary 1FGL J1018.6-5856
Hongjun An, Eric Bellm, Varun Bhalerao +11
We report on NuSTAR, XMM-Newton and Swift observations of the gamma-ray binary 1FGL J1018.6-5856. We measure the orbital period to be 16.544+/-0.008 days using Swift data spanning…