نتایج جستجو برای: flaring
تعداد نتایج: 2075 فیلتر نتایج به سال:
Motivated by the recent discovery of a hierarchical X-ray flaring phenomenon in Mrk 421, we conducted a systematic search for X-ray flares from Mrk 501, another well-known TeV blazar, by making use of the rich RXTE archival database. We detected flares over a wide range of timescales, from months down to minutes, as in the case of Mrk 421. However, the flares do not seem to occur nearly as freq...
We study the decay phase of an M2.6 flare, observed with ground based instruments at NSO/Sac Peak and with the cluster of instruments onboard Yohkoh. The whole set of chromospheric and coronal data gives a picture consistent with the classical Kopp-Pneumanmodel of two-ribbon flares.We clearly witness new episodes of coronal energy release, most probably due to magnetic reconnection, during the ...
OBJECTIVE To evaluate the reliability of concurrent flare identification using 3 methods (patient, rheumatologist and Disease Activity Score (DAS)28 criteria), and construct validity of candidate items representing the Outcome Measures in Rheumatology Clinical Trials (OMERACT) RA Flare Core Domain Set. METHODS Candidate flare questions and legacy measures were administered at consecutive visi...
We have analyzed a number of intense X-ray flares observed in the Chandra Orion Ultradeep Project (COUP), a 13 days observation of the Orion Nebula Cluster (ONC), concentrating on the events with the highest statistics (in terms of photon flux and event duration). Analysis of the flare decay allows to determine the physical parameters of the flaring structure, in particular its size and (using ...
We report on the rapid X-ray variability of the variable star and X-ray transient GM Sgr (SAX J1819.3–2525; XTE J1819–254) as observed on 15 Sept. 1999 by the proportional counter array (PCA) on board the Rossi X-ray Timing Explorer (RXTE). During the first ∼900 seconds of the first RXTE/PCA observation, GM Sgr showed very strong Xray fluctuations by a factor of 4 on time scales of seconds to a...
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