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Chandra X-Ray Point Source Catalog for the Old Open Cluster Collinder 261 (15 Jun 2017)
The catalog of 151 X-ray sources detected in a 53.8 ks observation
of the 7-Gyr old open cluster Cr 261 by the Chandra ACIS instrument (from
& van den Berg 2017, ApJ, 837, 130) is now available
in Browse and
Xamin, as is the associated list of 135
optical counterpart candidates of 98 of these X-ray sources.
A New X-Ray Observatory is Launched: the Hard X-ray Modulation Telescope (HXMT) (15 Jun 2017)
The Chinese X-ray observatory, HXMT (also known as Insight),
was launched earlier today (3:00 UTC) on a Long March 4B rocket. This mission
the most sensitive all-sky survey to date in the hard X-ray (20-250 keV)
energy band. It also has soft and medium X-ray (1 - 30 keV) detectors for
pointed observations of such objects as X-ray binaries, AGN, SNRs, soft gamma
repeaters, and clusters of galaxies. Congratulations to our Chinese
NuSTAR CALDB Update (14 Jun 2017)
The NuSTAR CALibration DataBase was updated on June 14, 2017 (CALDB version 20170614) This updates the NuSTAR clock correction file to version 72, valid through 2017-06-14.
NICER Installed on ELC2 (14 Jun 2017)
As of June 14, NICER is installed on the ISS Express Logistics Carrier 2 Site 7, and power up of the instrument has begun.
Happy 5th Birthday to NuSTAR! (13 Jun 2017)
The Nuclear Spectroscopic Telescope Array (NuSTAR) spacecraft
was launched on a Pegasus XL rocket dropped from a Lockheed L-1011 "TriStar"
aircraft flying over the Pacific Ocean near the Kwajalein Atoll on June 13,
2012. Since then it has made over 2100 hard X-ray observations in science mode
which have yielded (to date) hundreds
of refereed and other publications.
ROSAT All-Sky Survey and Sloan Digital Sky Survey DR7 Galaxy Clusters (13 Jun 2017)
This catalog of the X-ray emission (or lack thereof) found in
the RASS at the positions of 64,646 candidate galaxy clusters optically
identified in the SDSS DR7 (from Wang
et al. 2014, MNRAS, 439, 611) is now available
in Browse and
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