A 78 DAY X-RAY PERIOD DETECTED FROM NGC 5907 ULX1 BY SWIFT
نویسندگان
چکیده
منابع مشابه
A 78 Day X-ray Period Detected from Ngc 5907 Ulx1 by Swift
We report the detection of a 78.1±0.5 day period in the X-ray light curve of the extreme ultraluminous X-ray source NGC 5907 ULX1 ( ~ ́ L 5 10 X,peak 40 erg s), discovered during an extensive monitoring program with Swift. These periodic variations are strong, with the observed flux changing by a factor of ∼3–4 between the peaks and the troughs of the cycle; our simulations suggest that the o...
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We present results obtained from two broadband X-ray observations of the extreme ultraluminous X-ray source (ULX) NGC 5907 ULX1, known to have a peak X-ray luminosity of ∼ 5× 10 erg s. These XMMNewton and NuSTAR observations, separated by only ∼4 days, revealed an extreme level of short-term flux variability. In the first epoch, NGC 5907 ULX1 was undetected by NuSTAR, and only weakly detected (...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2016
ISSN: 2041-8213
DOI: 10.3847/2041-8205/827/1/l13