منابع مشابه
An extreme X - ray flare observed on EV Lac by ASCA in July 1998
We present a long (150 ks elapsed time) X-ray observation of the dM3.5e star EV Lac, performed with the ASCA observatory in July 1998, during which an exceptionally intense flaring event (lasting approximately 12 ks) was observed: at the flare’s peak, the X-ray count rate in the ASCA GIS detectors was ' 300 times the quiescent value. The physical parameters of the flaring region have been deriv...
متن کاملX-RAY FLARES OF EV Lac: STATISTICS, SPECTRA, AND DIAGNOSTICS
We study the spectral and temporal behavior of X-ray flares from the active M dwarf EV Lac in 200 ks of exposure with the Chandra/HETGS. We derive flare parameters by fitting an empirical function which characterizes the amplitude, shape, and scale. The flares range from very short (<1 ks) to long (∼104 s) duration events with a range of shapes and amplitudes for all durations. We extract spect...
متن کاملGALEX high time-resolution ultraviolet observations of dMe flare events
Aims. We present near ultraviolet (NUV:1750 2800Å) and far ultraviolet (FUV: 1350 1750Å) light-curves for flares on 4 nearby dMe-type stars (GJ 3685A, CR Dra, AF Psc and SDSS J084425.9+513830.5) observed with the GALEX satellite. Methods. Taking advantage of the time-tagged events recorded with the GALEX photon counting detectors, we present high temporal resolution (< 0.01 sec) analysis of the...
متن کاملX - ray spectroscopy of the active dM stars : AD Leo and EV Lac
We present results of an analysis of new observations of the active M dwarfs AD Leo (GJ 388) and EV Lac (GJ 873), performed with the X-ray satellite SAX, and compare them with both published and new analyses of ROSAT PSPC observations of these stars. The PSPC spectra can be fitted with one(EV Lac) or two-component (AD Leo) isothermal mekal models, and very low metallicity (∼ 0.1 solar); we have...
متن کاملSelf-scheduling of EV aggregators in Energy market based on Time-of-Use Pricing
This paper presents a new solution for the self-planning task of private EV aggregators to realize higher profits in distribution networks. Since the model is proposed from the EV aggregator's viewpoint, the corresponding effects of the aggregator's profit-seeking approach on the grid such as the power losses and voltage levels might be unknown or even negative. To address this issue, a commerc...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1995
ISSN: 0252-9211
DOI: 10.1017/s0252921100034655