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Different accretion heating of the neutron star crust during multiple outbursts in MAXI J0556-332
A. S. Parikh, J. Homan, R. Wijnands +11
The transient neutron star (NS) low-mass X-ray binary MAXI J0556332 provides a rare opportunity to study NS crust heating and subsequent cooling for multiple outbursts of the sa…
Multiwavelength Follow-up Observations of the Tidal Disruption Event Candidate 2XMMi J184725.1-631724
Dacheng Lin, Jay Strader, Eleazar R. Carrasco +5
The ultrasoft X-ray flare 2XMMi J184725.1-631724 was serendipitously detected in two XMM-Newton observations in 2006 and 2007, with a peak luminosity of 6X10^43 erg/s. It was sugge…
Hard X-ray Emission from the M87 AGN Detected with NuSTAR
Ka-Wah Wong, Rodrigo S. Nemmen, Jimmy A. Irwin +1
M87 hosts a 3-6 billion solar mass black hole with a remarkable relativistic jet that has been regularly monitored in radio to TeV bands. However, hard X-ray emission \gtrsim 10keV…
Absence of reflection features in NuSTAR spectra of the luminous neutron star X-ray binary GX 5-1
Jeroen Homan, James F. Steiner, Dacheng Lin +4
We present NuSTAR observations of the luminous neutron star low-mass X-ray binary (NS LMXB) and Z source GX 5-1. During our three observations made with separations of roughly two…
Large Decay of X-ray Flux in 2XMM J123103.2+110648: Evidence for a Tidal Disruption Event
Dacheng Lin, Olivier Godet, Luis C. Ho +3
The X-ray source 2XMM J123103.2+110648 was previously found to show pure thermal X-ray spectra and a ~3.8 hr periodicity in three XMM-Newton X-ray observations in 2003-2005, and th…
A likely decade-long sustained tidal disruption event
Dacheng Lin, James Guillochon, S. Komossa +11
Multiwavelength flares from tidal disruption and accretion of stars can be used to find and study otherwise dormant massive black holes in galactic nuclei. Previous well-monitored…