This service queries the catalog of images from the LOFAR HBA Tier-1
preliminary data release (LoTSS-PDR). This data release contains
images and catalogs that characterise the low-frequency radio emission
in the region of the HETDEX Spring Field. In excess of 40,000 sources
are detected in the images that cover an area of over 350 square
degrees, have a resolution of 25 arcsec, and typical noise levels of
less than 0.5 mJy/beam.
This service provides cutouts from the images of the LOFAR HBA Tier-1
preliminary data release (LoTSS-PDR). This data release contains
images and catalogs that characterise the low-frequency radio emission
in the region of the HETDEX Spring Field. In excess of 40,000 sources
are detected in the images that cover an area of over 350 square
degrees, have a resolution of 25 arcsec, and typical noise levels of
less than 0.5 mJy/beam.
Reduced frames of lensed quasar observations from Maidanak
Observatory. See the referenceURL for details on the reduction
procedure and calibration data.
The database of Gamma Ray Burst (GRB) photometrical observations
obtained on defferent telescopes at Fesenkov Astrophysical Institute,
Almaty, Kazakhstan. Observations were carried out in the optical
range.
From 1986 through 1991, the Astronomical Institute of Münster
University performed a search for flare stars in several southern
associations and open stellar clusters using the GPO telescope (d=40
cm, WFPDB identifier ESO040); the fields suveyed include Coalsack,
M42, B228 Lup, the Chameleon T1 association, omicron Vel cluster, R
CrA association, the Pipe nebula (B59 Oph), and the Sco-Oph
association. This was done primarily through multiple exposures. The
files published here are plate scans done in 2017.
The obscore collection name for these files is Muenster Flare Survey.
In the context of Kapteyn's plan to obtain a photometric standard, in
Potsdam more than 400 photographic plates of several Selected Areas,
Special Areas, and Kapteyn-Pritchard areas were obtained between 1910 and
1933, both as direct images and with an object prism. This service
provides FITS images of the science area of the plates as well as images of
the entire plates, including previous markings.
Sasmirala Subarcsecond mid-infrared atlas of local AGN
Short Name:
sasmirala atlas
Date:
23 Mar 2022 13:13:11
Publisher:
The GAVO DC team
Description:
These FITS images were generated with the IDL package MIRphot
[Asmus2014]_ by extraction (and combination) of the sub-images from the
chopped/nodded total images from COMICS, Michelle, T-ReCS and VISIR (see
[Asmus2014]_ for details).
The FITS images contain the central ~4 arcsec of each source centered on
the (putative) nuclear position with North being up and East to the
left. The WCS registration has been performed after extraction by using
coordinates of the nucleus from other wavelengths (mostly 2MASS and
NED). The uncertainty of these reference position is usually less than 1
arcsec. In addition, the imprecision of the assignment itself is ~1px ~
0.1".
The FITS images are flux calibrated (unit is mJy) using the Gaussian 2D
fits to the corresponding STD observation (where available, otherwise
using the median conversion factor for the used instrument/filter
settings). Therefore, correction factors have to be applied in case
other flux measurement methods are applied to the images. The flux
values given in the FITS headers should be regarded as approximate
values. In particular for the instruments, VISIR and COMICS, they are
not necessarily exactly equal to the values provided in the photometry
results table, because many flux measurements were performed during the
process of combining individual subimages (all in MIRphot), instead of
in the final combined image, provided here. The used total images are
available upon request. Note, however, that these are just the products
of the observatory-delivered pipelines with default parameters.
.. [Asmus2014] Asmus D., Hoenig S.F., Gandhi P., Smette A.,
Duschl W.: The subarcsecond mid-infrared view of local active
galactic nuclei: I. The N- and Q-band imaging atlas,
`2014MNRAS.439.1648A <http://ads.ari.uni-heidelberg.de/abs/2014MNRAS.439.1648A>`_