38 citations · 81 across the 5 of their papers we have counts for
4 papers · 1 filter
Spins of the supermassive black hole in M87: new constraints from TeV observations
Jian-Min Wang, Yan-Rong Li, Jain-Cheng Li +1
The rapid TeV ray variability detected in the well-known nearby radio galaxy M87 implies an extremely compact emission region (5-10 Schwarzschild radii) near the horizon of the…
INTEGRAL and XMM-Newton observations towards the unidentified MeV source GRO J1411-64
Diego F. Torres, Shu Zhang, Olaf Reimer +9
The COMPTEL unidentified source GRO J1411-64 was observed by INTEGRAL, and its central part, also by XMM-Newton. The data analysis shows no hint for new detections at hard X-rays.…
A quasi periodic signal with ultra low frequency discovered in V0332+53?
Shu Zhang, Diego F. Torres, JinLu Qu
The reported likely QPO is found to be an instrumental effect, which was never clarified in any INTEGRAL related literatures. The paper should therfore be withdrawn.
Discovery of new quasi-periodic oscillations in the X-ray transient source V~0332+53
J. L. Qu, S. Zhang, L. Song +1
We report the discovery of a new quasi-period oscillation (QPO) at 0.22 Hz, centered on the source spin frequency of the high mass X-ray binary system V~0332+53 when the source was…