Results 1 to 10 of about 34,291 (216)
GRB Flares: UV/Optical Flaring (Paper I) [PDF]
The Astrophysical Journal, 2013 We present a new algorithm for the detection of flares in gamma-ray burst (GRB) light curves and use this algorithm to detect flares in the UV/optical.
De Pasquale, M. +3 more
core +8 more sources
Radio and Optical Flares on the dMe Flare Star EV Lac
The Astrophysical JournalWe present the results of a coordinated campaign to observe radio and optical stellar flares from the nearby M dwarf flare star EV Lac. From a total of 27 hr of radio and 29 hr of optical observations, we examine the correspondence of the action of ...
Rachel A. Osten +6 more
doaj +4 more sources
A Multiwavelength Survey of Nearby M Dwarfs: Optical and Near-ultraviolet Flares and Activity with Contemporaneous TESS, Kepler/K2, Swift, and HST Observations [PDF]
The Astrophysical JournalWe present a comprehensive multiwavelength investigation into flares and activity in nearby M dwarf stars. We leverage the most extensive contemporaneous data set obtained through the Transiting Exoplanet Sky Survey, Kepler/K2, the Neil Gehrels Swift ...
Rishi R. Paudel +16 more
doaj +2 more sources
Catching profound optical flares in blazars [PDF]
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT Flaring episodes in blazars represent one of the most violent processes observed in extra-galactic objects. Studies of such events shed light on the energetics of the physical processes occurring in the innermost regions of blazars, which cannot otherwise be resolved by any current instruments.
Gopal Bhatta +13 more
openalex +4 more sources
LOW-POWER SOLAR FLARES OF OPTICAL AND X-RAY WAVELENGTHS FOR SOLAR CYCLES 21–24
Solar-Terrestrial Physics, 2020 Using data obtained in optical and X-ray wavelengths, we have analyzed solar flare activity for cycles 21–24. Over the last three cycles, solar activity is shown to decrease significantly.
A.V. Borovik , A.A. Zhdanov
doaj +3 more sources
Optical Discovery of Probable Stellar Tidal Disruption Flares [PDF]
The Astrophysical Journal, 2011 Using archival Sloan Digital Sky Survey (SDSS) multi-epoch imaging data (Stripe 82), we have searched for the tidal disruption of stars by supermassive black holes in non-active galaxies. Two candidate tidal disruption events (TDEs) are identified.
Drake, Andrew J. +8 more
core +8 more sources
X-Ray, Near-ultraviolet, and Optical Flares Produced by Colliding Magnetospheres in the Young High-eccentricity Binary DQ Tau [PDF]
The Astrophysical Journal, 2023 DQ Tau is a unique young high-eccentricity binary system that exhibits regular magnetic reconnection flares and pulsed accretion near periastron. We conducted NuSTAR, Swift, and Chandra observations during the 2022 July 30 periastron to characterize X ...
Konstantin V. Getman +5 more
doaj +2 more sources
Optical Flares of Cygnus X-1 [PDF]
Symposium - International Astronomical Union, 1998 Photoelectric observations of Cyg X-1 in 1996-97 fulfilled in Tien-Shan, Kazakhstan (WBVR), Mt. Maidanak, Uzbekistan (UBVR) and in Crimea, Ukraine (UBV) have detected unusual optical flare activity. During May-August 1996 Cyg X-1 was in high soft X-ray state and after August 9, 1996 it returned to its ordinary state but with some evidences of X-ray ...
N. G. Bochkarev +2 more
openalex +2 more sources
Infrared/optical - X-ray simultaneous observations of X-ray flares in GRB 071112C and GRB 080506 [PDF]
, 2010 We investigate the origin of short X-ray flares which are occasionally observed in early stages of afterglows of gamma-ray bursts (GRBs). We observed two events, GRB 071112C and GRB 080506, before the start of X-ray flares in the optical and near ...
Arai, A. +15 more
core +4 more sources
On Impulsive and Gradual Optical Solar Flares [PDF]
International Astronomical Union Colloquium, 1989 AbstractA comparative study of H-alpha intensity and area development of several flares is presented in an attempt to investigate characteristic features of various types of optical solar flares.
A. Bhatnagar +3 more
openalex +2 more sources