The Frontier Fields is a Spitzer and HST Director's Discretionary program of six deep fields centered on strong lensing galaxy clusters in parallel with six deep "blank fields". These will be the second deepest observations of blank fields and deepest observations of clusters and their lensed galaxies ever obtained.
The first data release contains all archival data taken on these six clusters as well as data taken for the cycle-9 SURFS-UP (PID:90009) program as of April 1, 2013. Improved reductions with better artifact correction and deeper data will be released periodically over the three year period.
IRSA hosts the Spitzer portion of the Frontier Fields data set. For the HST Frontier Fields data, see MAST.
The Galactic Plane Infrared Polarization Survey (GPIPS) covers 76 sq. deg. of the first Galactic quadrant midplane, 18<l<56 deg and -1<b<1 deg, in H-band (1.6 micron) linear polarimetry to reveal the plane-of-the-sky orientation of the magnetic field in diffuse and denser atomic and molecular clouds. The Survey consists of 3234 overlapping 10x10 arcmin fields observed using the Mimir instrument on the 1.8 m Perkins telescope.
The Galaxy Evolution Explorer (GALEX), a NASA Small Explorer mission, is performing the first all-sky, deep imaging and spectroscopic ultraviolet surveys in space. The prime goal of GALEX is to study star formation in galaxies and its evolution with time.
The GALEX, Galaxy Explorer, mission
was launched by a Pegasus-XL vehicle on April 28 2003 into
a 690km altitude, 29 degree inclination, circular orbit with a 98.6
minute period. The GALEX instrument allows imaging and spectroscopic
observations to be made in two ultraviolet bands,
Far UV (FUV) 1350-1780A and Near UV (NUV) 1770-2730A.
The instrument provides simultaneous co-aligned FUV and NUV
images with spatial resolution 4.3 and 5.3 arcseconds respectively.
Details of the performance of the instrument and detectors can be found in
Morrissey et al. (2007) ApJS, 173, 682.
<p>
The <i>SkyView</i> GALEX surveys mosaic the intensity images of
All-Sky Survey images. For a given pixel only the nearest image is used.
Since a given GALEX observation is circular, this maximizes the coverage
compared with default image finding algorithms which use the distance from
edge of the image.
<p>
As of February 10, 2011, SkyView uses the GALEX GR6 data release. Provenance: All data is downloaded from the <a href="https://galex.stsci.edu">
MAST GALEX archive</a>.. This is a service of NASA HEASARC.
Galaxy Halos, Outer disks, Substructure, Thick disks and Star clusters (GHOSTS)
Short Name:
GHOSTS
Date:
22 Jul 2020 21:59:56
Publisher:
Space Telescope Science Institute Archive
Description:
The GHOSTS survey is the largest study to date of the resolved stellar populations in the outskirts of disk galaxies. The sample consists of 14 disk galaxies within 17 Mpc, whose outer disks and halos are imaged with the Hubble Space Telescope Advanced Camera for Surveys (ACS).
The GALEX Atlas of Nearby Galaxies contains images of 1034 nearby galaxies recently observed by the GALEX satellite in its far-ultraviolet (FUV; 1516A) and near-ultraviolet (NUV; 2267A) bands. The Atlas was prepared by A. Gil de Paz,S. Boissier, B.F. Madore, M. Seibert and associated members of the GALEX Team. The full paper is posted on astroph/0606440 and will be published in ApJS in 2007.
GLEAM 72-103: GaLactic and Extragalactic Allsky MWA Survey
Short Name:
GLEAM1
Date:
07 Mar 2025
Publisher:
NASA/GSFC HEASARC
Description:
GLEAM, the GaLactic and Extragalactic All-sky MWA survey, is a survey of
the entire radio sky south of declination 30 degrees at frequencies
between 72 and 231 MHz. It was made with the Murchison Widefield Array
(MWA) using a drift scan method that makes efficient use of the MWA's very
large field-of-view. The survey is described in Wayth et al. (2015) and
the <a href="https://www.mwatelescope.org/gleam">website</a> at https://www.mwatelescope.org/gleam.
<p>
The data presented here are from the first year of GLEAM observing, published in:
<ul>
<li> Hurley-Walker et al. (2017): 25,000 square degrees of extragalactic sky
<li> For et al. (2018): the Large and Small Magellanic Clouds
<li> Hurley-Walker et al. (2019c): 8,000 square degrees of the Galactic plane
</ul>
A region around Centaurus A, a few other small regions described by Hurley-Walker et al. (2017), and the Galactic plane between 180 < l < 345 degrees, are not available.
<p>
The most sensitive and highest-resolution image is the 170-231MHz image
which was used for all source-finding in generating the catalogue. It has
a resolution of approximately 2.2 x 2.2/cos (dec + 26.7) arcmin at this
frequency. However, due to ionospheric distortions, the final resolution
of the survey varies by ~10% over the sky, with a direction-dependent PSF.
<p>
The <i>SkyView</i> data for the GLEAM surveys was extracted using the team's
cutout server, into small (3 degree) raw cutouts over the region covered
by the GLEAM survey. These cutouts have somewhat variable size and resolution. The
default scale (i.e., pixel size) used for <i>SkyView</i> images is given in the table
below. Since the GLEAM cutout server will not create an appropriately sized tile for the Sourth Pole, a
larger tile offset from the pole is used.
<p>
<i>SkyView</i> resamples the cutouts retreived from the GLEAM website into the image
geometry requested by the user. Only four wide-band datasets are included.
The table below gives the frequency range, central frequency and a typical pixel
scale for each of these bands.
<table border>
<tr><th colspan=5> GLEAM Bands In <i>SkyView</i> </th></tr>
<tr><th>Band</th>
<th>f<sub>min</sub> (MHz)</th>
<th>f<sub>max</sub> (MHz)</th>
<th>f<sub>C</sub> (MHz)</tg>
<th>Pixel scale (") </th>
</tr>
<tr> <td> 1 </td><td> 72 </td><td>103 </td><td> 88 </td> <td> 56 </td></tr>
<tr> <td> 2 </td><td>103 </td><td>134 </td><td>118 </td> <td> 44 </td></tr>
<tr> <td> 3 </td><td>138 </td><td>170 </td><td>155 </td> <td> 34 </td></tr>
<tr> <td> 4 </td><td>170 </td><td>231 </td><td>200 </td> <td> 28 </td></tr>
</table>
These data and 20 narrower bands are available through the team website.
<p>
To minimize resampling artifacts, this survey defaults to the Lanczos third order resampler.
SkyView tracks the size and orientation of the beam as given in each of the tiles and includes
the averaged value (i.e., the average of the input images weighted by the output pixels sampled
from each input) in the BMAJ, BMIN, and BPA keywords of any result FITS file. Provenance: Source data extracted as cutouts from <a href="http://gleam-vo.icrar.org/gleam_postage/q/form">GLEAM cutout server</a> in March 2020 with updates in July 2020.. This is a service of NASA HEASARC.
GMRT 150 MHz All-sky Radio Survey: First Alternative Data Release
Short Name:
TGSS
Date:
07 Mar 2025
Publisher:
NASA/GSFC HEASARC
Description:
The first full release of a survey of the 150 MHz radio sky observed with
the Giant Metrewave Radio Telescope between April 2010 and March 2012 as
part of the TGSS project.
Aimed at producing a reliable compact source survey, the automated data reduction
pipeline efficiently processed more than 2000 hours of observations with minimal
human interaction. Through application of innovative techniques such as image-based
flagging, direction-dependent calibration of ionospheric phase errors, correcting
for systematic offsets in antenna pointing, and improving the primary beam model,
good quality images were created for over 95 percent of the 5336 pointings.
This data release covers 36,900 square degrees (or 3.6 pi steradians) of the
sky between -53 deg and +90 deg DEC, which is 90 percent of the total sky.
The majority of pointing images have a background RMS noise below 5 mJy/beam
with an approximate resolution of 25" x 25" (or 25" x 25" / cos (DEC - 19 deg)
for pointings south of 19 deg DEC).
The associated catalog has 640 thousand radio sources derived from an initial,
high reliability source extraction at the 7 sigma level.
The measured overall astrometric accuracy is better than 2" in RA and DEC,
while the flux density accuracy is estimated at ~10 percent.
Data is stored as 5336 mosaic images (5 deg x 5 deg).
<p>
<i>SkyView</i> uses Lanczos resampling and Sqrt image scaling by default for this
survey. Provenance: TGS ADR Team. This is a service of NASA HEASARC.
This survey comprises the 2 Ms Chandra Deep Field North and 4 Ms Deep Field South ACIS observations.
All observations are co-added into two fields in the north and south. Data are provided in three bands,
the soft 0.5-2 keV band, the hard 2.0-8.0 keV and the full 0.5 to 8 keV band. Provenance: Taken from the Neil Brandt's PSU websites for the the
<a href="https://personal.psu.edu/wnb3/hdf/hdf-chandra.html">north</a>
and
<a href="https://personal.psu.edu/wnb3/cdfs/cdfs-chandra.html">south</a>.. This is a service of NASA HEASARC.
GOODS-Herschel is an open time key program of more than 360 hours of observation with the Hershel, SPIRE and PACS, from 100 um and 500.
<p>
North and South GOODS data is available for 100 and 160 microns (using PACS) but only the northern field is
available at 250, 350 and 500 microns (using SPIRE).
<p>
Note that the scale and resolution of the underlying pixels is different in each band. Provenance: Downloaded from the <a href="https://hedam.lam.fr/GOODS-Herschel/">Herschel Database in Marseille</a>. Release DR1.. This is a service of NASA HEASARC.
![the Fornax VST Survey is licensed under the `Creative Commons Attribution 4.0 License <http://creativecommons.org/licenses/by/4.0/>`_ .. image:: /static/img/ccby.png :alt: [CC-BY]](/registry-search/?f%5BcapabilityType_facet%5D%5B%5D=Simple+Image+Access+Protocol&f%5Brights_facet%5D%5B%5D=the+Fornax+VST+Survey+is+licensed+under+the+%60Creative+Commons+Attribution+4.0+License+%3Chttp%3A%2F%2Fcreativecommons.org%2Flicenses%2Fby%2F4.0%2F%3E%60_%0A%0A..+image%3A%3A+%2Fstatic%2Fimg%2Fccby.png%0A+++%3Aalt%3A+%5BCC-BY%5D%0A%0A&f%5Btype_facet%5D%5B%5D=Archive){kind=link}