This AstroGrid community is for users from the Univeristy of Edinburgh, as well as users from continental Europe who have requested AstroGrid access to UKIDSS data. It is also for those users who will be using UKIDSS heavily and would like to have their online data storage close to the actual database server.
The catalog 1WHSP is the result of a multi-frequency selection for
blazars like SED, further filtered using IR-radio and IR-X-ray
flux-ratios. The sample assembled contains almost 992 sources of HSP
blazars, of which 425 are previously known blazars, 151 new
identifications and 416 blazar candidates. On the very high energy
trend, 299 are confirmed GeV gamma-ray photons emitters and 36 have
already been detected in the TeV band.
The Wide-Field Plate Database (WFPDB_) contains the descriptive information
for the astronomical wide-field (>1°) photographic observations stored in
numerous archives all over the world. The total number of these
observations, obtained since the end of the 19th century with more
then 200 instruments (telescopes) is about 2 550 000 from 509 archives.
The WFPDB is continually being updated, providing currently access to the
information for about 640 000 plates from 117 plate archives (30% of the
estimated total number of wide-field plates)
.. _WFPDB: http://www.skyarchive.org/
The Wide-field Infrared Survey Explorer (WISE) is a space-based imaging
survey of the entire sky in the 3.4 (W1), 4.6 (W2), 12 (W3), and 22 (W4) μm
mid-infrared. This is the project's reliable Source Catalog containing
accurate photometry and astrometry for over 500 million objects.
More details are available in the `Explanatory Supplement`_, which also
has a list of `Cautionary Notes`_.
.. _Explanatory Supplement: http://wise2.ipac.caltech.edu/docs/release/allsky/expsup/sec1_1.html
.. _Cautionary Notes: http://wise2.ipac.caltech.edu/docs/release/allsky/expsup/sec1_4b.html
WFAU, Institute for Astronomy, University of Edinburgh
Description:
NASA's Wide-field Infrared Survey Explorer (WISE; Wright et al. 2010) mapped the sky at 3.4, 4.6, 12, and 22 μm (W1, W2, W3, W4) in 2010 with an angular resolution of 6.1", 6.4", 6.5", & 12.0" in the four bands. WISE achieved 5Ï? point source sensitivities better than 0.08, 0.11, 1 and 6 mJy in unconfused regions on the ecliptic in the four bands. Sensitivity improves toward the ecliptic poles due to denser coverage and lower zodiacal background.
Active Galactic Nuclei (AGNs)
are extragalactic objects characterized by extremely complex physical processes
and strong temporal flux variability over almost the whole electromagnetic
spectrum, which play a very important role in studying the formation and
evolution of galaxies, cosmology and many other astrophysical problems.
Flux variability is one of the most remarkable observational characteristics
of AGNs and the variability time scales are from minutes to dozens of years.
Multi-wavelength flux monitoring is the main means to study the nature of AGN flux variability.
In order to systematically study the total flux variability of AGNs in radio band,
we launched a long-term program, which is called the quasi- Simultaneous Multiwavelength
Monitoring of AGNs with the Nanshan 26-m radio telescope of Xinjiang Astronomical Observatory (XAO),
namely SMMAN program. The monitoring data were acquired monthly with the cross-scan mode at
C-band (4.8 GHz) and K-band (23.6 GHz) for a sample of about 100 AGNs selected from Fermi-LAT suvery.
Additionally, we also conducted weekly monitoring observations or Intra-Day Vairibility (IDV)
observations for some of flaring Blazars to reveal their more complex variability time scales.
