November 13, 2013
AllWISE Data Release
The Wide-field Infrared Survey Explorer (WISE) and IRSA announce the AllWISE Data Release.
The AllWISE program combines data from WISE cryogenic and NEOWISE post-cryogenic survey phases, to form the most comprehensive view of the mid-infrared sky currently available. By combining the data from two complete sky coverage epochs in an advanced data processing system, AllWISE has generated new products that have enhanced photometric sensitivity and accuracy, and improved astrometric precision compared with the earlier WISE All-Sky Data Release. Exploiting the 6 month baseline between the WISE sky coverage epochs enables AllWISE to measure source motions for the first time, and to compute improved flux variability statistics.
AllWISE data release products include: a Source Catalog that contains 4-band fluxes, positions, apparent motion measurements, and flux variability statistics for over 747 million objects detected at SNR>5 in the combined exposures; a Multiepoch Photometry Database containing over 42 billion time-tagged, single-exposure fluxes for each object detected on the combined exposures; and an Image Atlas of 18,240 4-band calibrated FITS images, depth-of-coverage and noise maps that cover the sky produced by coadding nearly 7.9 million single-exposure images from the cryogenic and post-cryogenic survey phases.
October 15, 2013
Herschel HERITAGE Data Release
IRSA announces the release of image and catalog data from the HERITAGE Herschel Open Time Key Program.
The HERschel Inventory of The Agents of Galaxy Evolution (HERITAGE) Open Time Key Program mapped the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) at 100, 160, 250, 350, and 500 microns using the PACS and SPIRE instruments on ESA's Herschel Space Observatory. The overriding science goal of HERITAGE is to study the life cycle of matter as traced by dust in the LMC and SMC. There are two main pointings, one for the LMC and the other for the SMC. For each of these, the PACS and SPIRE pointings are slightly offset. Images and uncertainty maps in MJy/sr are available for all the bands. Coverage maps (in frames per pixel) are available for the SPIRE bands.
WISE image of the Witch Head Nebula (IC 2118).
The Witch Head Nebula is estimated to be hundreds of light-years away in the Orion constellation, just off the famous hunter's knee.