GR1 data have been released to the public in stages at MAST http://galex.stsci.edu, the Multi-mission Archive at Space Telescope. The GR1 release is now complete.
GR1a) Released 30 Nov 2004, MIS (Medium Imaging Survey) and NGS (Nearby Galaxy Survey)
GR1b) Released 06 Dec 2004, AIS (All-sky Imaging Survey)
GR1c) Released 04 Jan 2005, DIS (Deep Imaging Survey)
GR1d) Released 24 May 2005, WSS (Wide Spectroscopic Survey) and MSS (Medium Spectroscopic Survey)
See the GALEX spectroscopy primer for an introduction to GALEX Spectroscopic data.
Note that the actual exposure times accumulated in the data released in GR1 can vary widely from the nominal values (Survey summary), which are for long range planning only.
The GALEX Early Release Observations, the previous public data release, was released Mar 11, 2004 by MAST. That release is now superseded by GR1, but is still available at http://galex.stsci.edu/ero .
Observations continue on the surveys. The NGS is largely complete. In spectroscopic observations, we are concentrating on MSS and DSS (Deep Spectroscopic Survey) before deciding whether to continue with WSS, which has lower S/N.
Guest Investigator Program cycle 1 observations began Oct 2004. For cycle 2 see http://galexgi.gsfc.nasa.gov . Dates are as follows:
11 March 2005
GALEX GI Cycle 2: Notice of Intent deadline
8 April 2005
GALEX GI Cycle 2: Proposal submission deadline
~1 October 2005
GALEX GI Cycle 2 observations begin
After 1 Nov 2005
GALEX Data Release 2 (GR2)
MAST will release guest investigator survey data to the public
six months after releasing it to the guest investigator.
NASA has extended the GALEX baseline mission through September 2006, with an extended mission recommended through September 2008.
The GR1 documentation is being updated. Check back for changes and additions.
For questions about the use and interpretation of GALEX data, email email@example.com . Answers will be emailed and/or posted to FAQ (see below). Please be patient.
For questions about using the MAST archive or database see http://archive.stsci.edu/contacts.html .
In the PDF versions of HTML pages below, the links are not live, in spite of their look.
Included here are various caveats that the user should be aware of to insure that the data is understood and used appropriately. In addition there are some idiosyncrasies that it may be helpful for the user to be aware of.
Summary of the instrument and it’s performance.
Summary of the baseline GALEX survey plan.
An overview of the mission written for astronomers planning
to examine GR1 data or considering Guest Investigations. In any instances where
this older document has not yet been updated and conflicts with other GR1
the other documents take precedence.
“THE GALAXY EVOLUTION EXPLORER A SPACE ULTRAVIOLET SURVEY MISSION,” lead article in the Astrophysical Journal Letters dedicated GALEX issue, due out Feb. 2005.
Description of GR1 emphasizing basic data products.
Guide for planning or interpreting GALEX observations.
GALEX Data pipeline overview with information about advanced data products.
Detailed explanation of background determination and subtraction, image processing, and source extraction in the GALEX data pipeline.
Description of parameters provided in the band-combined spectroscopic files, -xg-gsp.fits.
Description of GALEX spectroscopy including an explanation of slitless grism spectroscopy data and source overlaps, sensitivity, data products, quality assessment, a gallery of GALEX spectra, and an IDL tool for examining GALEX spectra efficiently.
Description of artifacts in GALEX spectroscopy including those caused by masking of nearby sources.
Description of an IDL tool for examining GALEX spectra efficiently.
“THE ON-ORBIT PERFORMANCE OF THE GALAXY EVOLUTION EXPLORER,” the calibration article from the Astrophysical Journal Letters dedicated GALEX issue, due out Feb. 2005.
A presentation that updates the earlier analysis contained in “THE ON-ORBIT PERFORMANCE OF THE GALAXY EVOLUTION EXPLORER,” especially in the areas of astrometry and photometry.
A detailed guide to operating the GALEX detectors.