scholarly journals VERITAS: Very energetic radiation imaging telescope array system

2000 ◽  
Author(s):  
F. Krennrich
Keyword(s):  
Telescope Array ◽  
Radiation Imaging ◽  
Imaging Telescope ◽  
Energetic Radiation

INITIAL STEREO ANALYSIS OF MRK 421 FROM THE VERITAS TELESCOPES

2007 ◽  
Vol 22 (14n15) ◽  
pp. 2461-2467
Author(s):  
◽  
S. B. HUGHES
Keyword(s):  
Light Curve ◽  
Gamma Ray ◽  
Angular Resolution ◽  
Large Set ◽  
Telescope Array ◽  
Radiation Imaging ◽  
Stereo Analysis ◽  
Imaging Telescope ◽  
Energetic Radiation ◽  
Gamma Ray Telescopes

VERITAS (Very Energetic Radiation Imaging Telescope Array System), an array of ground-based gamma-ray telescopes in southern Arizona, USA, has been taking data in hardware stereo mode since March, 2006. The April–May 2006 dark run provided a large set of data from two telescopes on the known blazar Markarian (Mrk) 421. An initial analysis produced a light curve and preliminary cuts showing the two telescope array's angular resolution to be 0.19°. The remaining two VERITAS telescopes will be brought online by January, 2007.

scholarly journals VERITAS: the Very Energetic Radiation Imaging Telescope Array System

2002 ◽  
Vol 17 (2) ◽  
pp. 221-243 ◽  
Author(s):  
T.C Weekes ◽  
H Badran ◽  
S.D Biller ◽  
I Bond ◽  
S Bradbury ◽  
...  
Keyword(s):  
Telescope Array ◽  
Radiation Imaging ◽  
Imaging Telescope ◽  
Energetic Radiation

scholarly journals VERITAS: the Very Energetic Radiation Imaging Telescope Array System

2004 ◽  
Vol 48 (5-6) ◽  
pp. 345-349 ◽  
Author(s):  
F. Krennrich ◽  
I.H. Bond ◽  
P.J. Boyle ◽  
S.M. Bradbury ◽  
J.H. Buckley ◽  
...  
Keyword(s):  
Telescope Array ◽  
Radiation Imaging ◽  
Imaging Telescope ◽  
Energetic Radiation

X-Ray Transients in the SRG/eROSITA All-Sky Survey

2017 ◽  
Vol 14 (S339) ◽  
pp. 145-145
Author(s):  
A. Rau
Keyword(s):  
Survey Data ◽  
Time Domain ◽  
Scanning Strategy ◽  
Telescope Array ◽  
X Ray ◽  
Sky Survey ◽  
Wide Range ◽  
Imaging Telescope

AbstracteROSITA (the extended ROentgen Survey with an Imaging Telescope Array) onboard the Spectrum Roentgen Gamma mission will perform a deep all-sky X-ray survey. During the first four years of operation the satellite will scan the entire sky every once every half year, visiting any position between 8 and 500 times. The eROSITA scanning strategy will test a wide range of times-scales, from seconds to years, and thus provide a powerful window into the X-ray transient and variable sky. This contribution summarised the key science opportunities for time-domain studies with eROSITA, and presented strategies for finding transients in the all-sky survey data.

scholarly journals Observations of Her X-1 in low states during SRG/eROSITA all-sky survey

2021 ◽  
Vol 648 ◽  
pp. A39
Author(s):  
N. I. Shakura ◽  
D. A. Kolesnikov ◽  
P. S. Medvedev ◽  
R. A. Sunyaev ◽  
M. R. Gilfanov ◽  
...  
Keyword(s):  
Neutron Star ◽  
Accretion Disk ◽  
Telescope Array ◽  
Sky Surveys ◽  
X Ray ◽  
Sky Survey ◽  
Imaging Telescope ◽  
Optical Star ◽  
Orbital Modulation ◽  
Hot Corona

eROSITA (extended ROentgen Survey with an Imaging Telescope Array) instrument onboard the Russian-German ‘Spectrum-Roentgen-Gamma’ (SRG) mission observed the Her X-1/HZ Her binary system in multiple scans over the source during the first and second SRG all-sky surveys. Both observations occurred during a low state of the X-ray source when the outer parts of the accretion disk blocked the neutron star from view. The orbital modulation of the X-ray flux was detected during the low states. We argue that the detected X-ray radiation results from scattering of the emission of the central source by three distinct regions: (a) an optically thin hot corona with temperature ~(2−4) × 106 K above the irradiated hemisphere of the optical star; (b) an optically thin hot halo above the accretion disk; and (c) the optically thick cold atmosphere of the optical star. The latter region effectively scatters photons with energies above 5–6 keV.

scholarly journals EUVITA - an extreme UV imaging telescope array with spectral capability

1993 ◽  
Vol 4 (2) ◽  
pp. 117-135 ◽  
Author(s):  
J. -L. Courvoisier ◽  
A. Orr ◽  
P. Bühler ◽  
A. Zehnder ◽  
R. Henneck ◽  
...  
Keyword(s):  
Telescope Array ◽  
Uv Imaging ◽  
Imaging Telescope ◽  
Extreme Uv

Extreme UV imaging telescope array on the spectrum X-G satellite

1990 ◽  
Author(s):  
Alex Zehnder ◽  
Joerg Bialkowski ◽  
P. Buehler ◽  
E. Morenzoni ◽  
Nick Schlumpf ◽  
...  
Keyword(s):  
Telescope Array ◽  
Uv Imaging ◽  
Imaging Telescope ◽  
Extreme Uv
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