The Great Observatories Origins Deep Survey (GOODS)
Spitzer Legacy Science Program
Data Products


GOODS data product release documents:


Schedule for GOODS Spitzer data releases:

Data Release 1 (DR1) - October 2004: Best-effort reductions of the first epoch IRAC "superdeep" observations for both GOODS fields.

Interim Data Release (DR1+) - February 2005: Best-effort reductions of the MIPS 24 micron imaging data for GOODS-N, and a preliminary 24 micron source list. The GOODS-S field has also been observed at 24 microns, but those data are embargoed until mid-year 2005, and will thus be released at a later date (see DR3, below).

Data Release 2 (DR2) - May 2005: Best-effort reductions of the 2nd epoch IRAC superdeep observations for both fields.

Data Release 3 (DR3) - December 2005: Best-effort reductions of the GOODS-S MIPS 24 micron images, and an updated (v0.3) reduction of the GOODS-S IRAC epoch 1 images (only) to replace the v0.2 reduction that was released in DR1.

Originally, it had been our intent to release the GOODS-N IRAC ultradeep images in DR2 or DR3. However, as of the DR3 release date, we remain unsatisfied with the reductions, even as "best-effort" data products. In particular, the BCD pipeline does not yet provide adequate correction for bright-source effects such as "muxbleed" and "mux-striping," which have a significant impact on these ultradeep images. The GOODS team is continuing to work on developing improved corrections for these effects. In addition, Spitzer will reobserve several of the GOODS ultradeep IRAC AORs in late November 2005 to replace observations last year which were adversely affected by an inadvertant observation of IRC+10216 with IRAC shortly before the GOODS observations were taken. We will wait to incoporate those new AORs, along with improved corrections for bright source effects, and release the reduced ultradeep data as soon as possible in 2006, either in DR4 or as an interim DR3+.

Data Release 4 (DR4) - Spring 2006: The fourth GOODS data release will provide "version 1" products for the complete GOODS Spitzer data set. Originally, the v1 products had been planned for DR3. However, in practice, the "v0.3" data products that have been released in GOODS DR1 through DR3 meet the standards that the GOODS team had anticipated for "v1", and we do not yet feel that we have achieved a substantial improvement over those earlier data releases. We will prepare v1 IRAC data products incorporating new bright-source effect corrections (muxbleed, mux-striping) when we are satisfied with these (see notes above for the GOODS-N IRAC ultradeep data). We also plan to use BCD images uniformly reprocessed by the SSC using the S13 pipeline, when these become available. Photometric catalogs for all data sets will also be released at this time.

We are also planning to release data products from the ancillary NOAO observations of the GOODS fields. Although this release was intended for DR2 or DR3, in 2005 we acquired additional data from KPNO 4m with FLAMINGOS which will significantly improve the depth and quality of our GOODS-N infrared data, particularly in the J- and H-bands. We will therefore wait until these data have been reduced and combined with observations from previous years before releasing the NOAO data. Our 2002 KPNO 4m MOSAIC U-band observations of GOODS-N, along with BVRIz images from Subaru SuPrime and HK' images from the UH 2.2m, are published in Capak et al. 2004, AJ, 127, 180, and are available at the Hawaii Hubble Deep Field North web site. ESO ancillary observations for the GOODS-S field, including near-infrared imaging from the VLT/ISAAC, and spectroscopy from VLT/FORS2, are also available from the ESO GOODS web pages. ESO has recently (30 September 2005) updated its GOODS ISAAC data release with an augmented and rereduced set of images, and will also release new FORS2 spectra later in 2005.

Data Release 5 (DR5) - Fall 2006: The final GOODS Legacy program data release will include "version 2" reprocessed images from all Spitzer data sets, if we find that this is warranted based on improved knowledge of the instrument calibrations, pipelines, and reduction procedures. Moreover, DR5 will provide the final suite of "panchromatic" catalogs for the multi-observatory, multi-wavelength GOODS data sets. These catalogs will incorporate measurements from the revised, "version 2" HST/ACS Treasury Program images (which will include additional ACS data obtained as part of supernova searches in HST Cycles 12 and 13), all optical and near-infrared ground-based imaging from NOAO and ESO, and the complete Spitzer IRAC and MIPS data sets. Photometry will be matched across all data sets to provide full spectral energy distributions, properly accounting for variations in angular resolution. Cross-matching to other data sets for the GOODS fields (e.g., X-ray, radio, and spectroscopy) will also be provided.