8.6k citations
- Chinese Academy of SciencesCN1.4k papers
- University of Chinese Academy of SciencesCN744 papers
- National Astronomical ObservatoriesCN633 papers
- Shanghai Jiao Tong UniversityCN402 papers
- Peking UniversityCN375 papers
- University of Science and Technology of ChinaCN328 papers
- Centre National de la Recherche ScientifiqueFR287 papers
- Purple Mountain ObservatoryCN260 papers
- Center for Astrophysics Harvard & SmithsonianUS258 papers
- National Astronomical Observatory of JapanJP257 papers
- Nanjing UniversityCN250 papers
- Korea Astronomy and Space Science InstituteKR242 papers
44 papers · 2 filters
Transient X-ray Sources in the Magellanic-type Galaxy NGC 4449
V. Jithesh, Zhongxiang Wang
We report the identification of seven transient X-ray sources in the nearby Magellanic-type galaxy NGC 4449 using the archival multi-epoch X-ray observations conducted with {\it Ch…
A Hard-to-Soft State Transition of Aquila X-1 Observed with Suzaku
Ko Ono, Kazuo Makishima, Soki Sakurai +3
The recurrent soft X-ray transient Aquila X-1 was observed with Suzaku for a gross duration of 79.9 ks, on 2011 October 21 when the object was in a rising phase of an outburst. Dur…
Multiband optical variability of the blazar OJ 287 during its outbursts in 2015 -- 2016
Alok C. Gupta, A. Agarwal, A. Mishra +31
We present recent optical photometric observations of the blazar OJ 287 taken during September 2015 -- May 2016. Our intense observations of the blazar started in November 2015 and…
On the radio dichotomy of active galactic nuclei
Xinwu Cao
It is still a mystery why only a small fraction of active galactic nuclei (AGNs) contain relativistic jets. Strong magnetic field is a necessary ingredient for jet formation, howev…
A magnetohydrodynamic model for multi-wavelength flares from Sagittarius~A (I): model and the near-infrared and X-ray flares
Ya-Ping Li, Feng Yuan, Q. Daniel Wang
Flares from the supermassive black hole in our Galaxy, Sagittarius~A (Sgr A), are routinely observed over the last decade or so. Despite numerous observational and…
The universal "heartbeat" oscillations in black hole systems accross the mass-scale
Qingwen Wu, Bozena Czerny, Mikolaj Grzedzielski +7
The hyperluminous X-ray source (HLX-1, the peak X-ray luminosity ) near the spiral galaxy ESO 243-49 is possibly the best candidate for intermediate ma…