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A deep Chandra look at the low L_B elliptical NGC821: X-ray binaries, a galactic wind and emission at the nucleus
S. Pellegrini, A. Baldi, D. W. Kim +4
The relatively nearby (distance=24.1 Mpc) elliptical galaxy NGC821, hosting a central massive black hole but inactive at all wavelengths, was observed with Chandra for a total expo…
Probing the Magnetic Field at Sub-Parsec Radii in the Accretion Disk of NGC 4258
Maryam Modjaz, James M. Moran, Paul T. Kondratko +1
We present an analysis of polarimetric observations at 22 GHz of the water vapor masers in NGC 4258 obtained with the VLA and the GBT. We do not detect any circular polarization in…
X-ray Luminosity and Absorption Column Fluctuations in the H2O Maser Galaxy NGC 4258 from Weeks to Years
Antonella Fruscione, Lincoln J. Greenhill, Alexei V. Filippenko +3
We report monitoring of the 0.3-10 keV spectrum of NGC4258 with XMM over 1.5 years.We als o report reprocessing of an overlapping series of archival Chandra observations. By includ…
GBT Discovery of Two Binary Millisecond Pulsars in the Globular Cluster M30
Scott M. Ransom, Ingrid H. Stairs, Donald C. Backer +4
We report the discovery of two binary millisecond pulsars in the core-collapsed globular cluster M30 using the Green Bank Telescope (GBT) at 20 cm. PSR J2140-2310A (M30A) is an ecl…