منابع مشابه
A new luminous supersoft X - ray source in NGC 300
Context. We report the discovery of a new luminous supersoft source, XMMU J005455.0−374117, in the nearby spiral galaxy NGC 300, in XMM-Newton observations performed on 2005 May 22 and on 2005 November 25. The source is not present in ROSAT data nor in the previous XMM-Newton observations of 2000 December/2001 January. The unique luminous supersoft source, XMMU J005510.7−373855, detected in the...
متن کاملA Luminous Recurrent Supersoft X-ray Source in Ngc 300
We report the results of XMM-Newton observations for an especially luminous supersoft X-ray source (SSS) with bolometric luminosity of 10 39 erg s −1 in the spiral galaxy NGC 300. The source was detected as a SSS in 1992 and disappeared in subsequent X-ray observations. The source was active again during recent XMM-Newton observations. It appeared to be very soft (kT ∼ 60 eV) and very luminous ...
متن کاملLuminous Optical Transient in the Nearby Galaxy Ngc 300 1
A luminous optical transient (OT) that appeared in NGC 300 in early 2008 had a maximum brightness, MV ≃ −13, intermediate between classical novae and supernovae. We present ground-based photometric and spectroscopic monitoring and adaptive-optics imaging of the OT, as well as preand post-outburst space-based imaging with HST and Spitzer. The optical spectrum at maximum showed an F-type supergia...
متن کاملX - ray emission from the Sculptor galaxy NGC 300
We report here the results of a full analysis of all the ROSAT PSPC spectral imaging observations and all the ROSAT HRI high resolution imaging observations of the very nearby (D = 2.1 Mpc) Sculptor galaxy, NGC 300. Many point sources are detected within the field, several of them showing evidence for variability, and we present full source lists detailing their X-ray properties, and attempt to...
متن کاملNGC 300 X-1 and IC 10 X-1: a new breed of black hole binary?
Context. IC 10 X-1 has recently been confirmed as a black hole (BH) + Wolf-Rayet (WR) X-ray binary, and NGC 300 X-1 is thought to be. The only other known BH+WR candidate is Cygnus X-3. IC 10 X-1 and NGC 300 X-1 have similar X-ray properties, with 0.3–10 keV luminosities ∼1038 erg s−1, and their X-ray lightcurves exhibit orbital periods ∼30 h. Aims. We investigate similarities between IC 10 X-1...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2018
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921318007822