First Results fromNuSTARObservations of Mkn 421
نویسندگان
چکیده
منابع مشابه
Observations of Mkn 421 using Pachmarhi Array of Čerenkov Telescopes
Pachmarhi Array of Čerenkov Telescopes (PACT), based on wavefront sampling technique, has been used for detecting TeV gamma rays from galactic and extra-galactic γ-ray sources. The Blazar, Mkn 421 was one such extragalactic source observed during the winter nights of 2000 and 2001. We have carried out a preliminary analysis of the data taken during the nights of January, 2000 and 2001. Results ...
متن کاملSAX Observations of Mkn 421 : clues on the particle acceleration ?
Mkn 421 was repeatedly observed with BeppoSAX in 1997–1998. We present highlights of the results of the thorough temporal and spectral analysis discussed by Fossati et al. (1999) and Maraschi et al. (1999), focusing on the flare of April 1998, which was simultaneously observed also at TeV energies. The detailed study of the flare in different energy bands reveals a few very important new result...
متن کامل0 Observations of Mkn 421 with the CELESTE Experiment
The CELESTE experiment uses the heliostats of an old solar farm in the French Pyrenees to detect gamma ray air showers by the atmospheric Cerenkov technique. Observations of the TeV blazar Markarian 421 have been made with the fully instrumented CELESTE experiment since December 1999. The detection of gamma ray emission from this source at energies greater than 50 GeV is presented here. A compa...
متن کاملThe Chandra High Resolution Spectra of Mkn 421
Mkn 421 was observed by Chandra twice, on November 5, 1999 as part of the Chandra calibration program, with the ACIS-HETG configuration, and on May 29, 2000 following our Target Of Opportunity request aimed to catch the source in an ultra-high state, with both the ACIS-HETG and the HRC-LETG configurations. In this contribution we present and compare the two Chandra-MEG observations of Mkn 421, ...
متن کاملCorrelated variability of Mkn 421 at X-ray and TeV wavelengths on time scales of hours
Mkn 421 was observed for about two days with BeppoSAX, prior to and partly overlapping the start of a 1 week continuous exposure with ASCA in April 1998, as part of a world-wide multiwavelength campaign. A pronounced, welldefined flare observed in X-rays was also observed simultaneously at TeV energies by the Whipple Observatory’s 10 m gamma-ray telescope. These data provide the first evidence ...
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ژورنال
عنوان ژورنال: EPJ Web of Conferences
سال: 2013
ISSN: 2100-014X
DOI: 10.1051/epjconf/20136104013