منابع مشابه
The X-ray emission from Nova V382 Velorum: II. The super-soft component observed with BeppoSAX
Nova Velorum 1999 (V382 Vel) was observed by BeppoSAX 6 months after optical maximum and was detected as a bright X-ray supersoft source, with a count rate 3.454±0.002 cts s in the LECS. It was the softest and most luminous supersoft source observed with this instrument. The flux in the 0.1–0.7 keV range was not constant during the observation. It dropped by a factor of 2 in less than 1.5 hour ...
متن کاملThe early X - ray emission from V 382 Velorum ( = Nova Vel 1999 ) : An internal shock model
We present the results of ASCA and RXTE observations of the early X-ray emission from the classical nova V382 Velorum. Its ASCA spectrum was hard (kT∼10 keV) with a strong (10 cm) intrinsic absorption. In the subsequent RXTE data, the spectra became softer both due to a declining temperature and a diminishing column. We argue that this places the X-ray emission interior to the outermost ejecta ...
متن کاملGRS 1009 – 45 ( = X - Ray Nova Velorum 1993 ) : a ‘ hybrid ’ soft X - ray transient ? ?
High–time resolution photometry, performed from November 17 to December 11, 1993, on GRS 1009–45 (=XRay Nova Velorum 1993) reveals a V light modulation with a periodicity of 0.1996 days (∼ 4h.79). If the nature of this modulation is similar to that of the superhumps seen in SU UMa dwarf novae during superoutbursts, then the object would have the shortest orbital period among Soft X-Ray Transien...
متن کاملThe X-ray emission from Nova V382 Velorum: I. The hard component observed with BeppoSAX
We present BeppoSAX observations of Nova Velorum 1999 (V382 Vel), done in a broad X-ray band covering 0.1-300 keV only 15 days after the discovery and again after 6 months. The nova was detected at day 15 with the BeppoSAX instruments which measured a flux Fx ≃1.8 ×10 −11 erg cm s in the 0.110 keV range and a 2σ upper limit Fx <6.7 ×10 −12 erg cm s in the 15-60 keV range. We attribute the emiss...
متن کاملAn X - ray emission line spectrum of Nova V 382 Velorum 1999
We report on the analysis of an X-ray grating spectrum of the Classical Nova V382 Vel (1999), obtained with the LETG+HRC-S instrument on board CHANDRA, which shows emission lines dominating over any continuum. C are identified, but no Fe lines are detected. The total luminosity in the lines is ∼ 4 × 10 27 erg s −1 (corrected for N H = 1.2 × 10 21 cm −2). The lines have broad profiles with FWHM ...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 1906
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.19061731804