JADES

The JWST Advanced Deep Survey (JADES) is the largest deep survey program that will be exected in the first few of years of operation of JWST.  Three GTO Teams (NIRCam, NIRSpec, MIRI-U.S.) have combined time to produce a survey which will ultimately cover over 100 square arc minutes from 0.7 to 5 microns and 10 square arc minutes at 7.7 microns and produce thousands of galaxy spectra. The imaging data presented now is the second release from the survey and covers the imaging acquired in September - October 2022. The number of filters is increased from 9 to 14 with the inclusion of imagery from JEMS (DOI 10.17909/fsc4-dt61).  The area covered is approximately 60 square arc minutes with exposure times per filter ranging from ~14,000 to ~73,000 seconds. This release only includes additional imaging. These data provide large galaxy samples for studying galaxy evolution from z~1 to at least z~13, and also to study the full diversity of galaxy characteristics. An updated catalog with photometry and photometric redshifts is included with this release. Additionally, “FITSMap” provides a multicolor image browser and links to the photometry.

Figure 1 shows the footprint for this data release while Figure 2 shows the footprint for the first data release.

In addition to increasing the areal coverage, the production of mosaics was modified to permit co-addition of all images in a given filter covering an area. Photometric measurements and photo-z estimations were done in the same fashion as for the first data release.

Figure 3 shows an example of a galaxy with a photometric redshift of 1.78 that is nearly invisible to HST ACS but is seen as a well-resolved but obscured spiral to JWST. 

The NIRSpec spectra presented as part of this release comprise a sample selected largely from objects detected using HST imaging of the ultra deep field (UDF). Bunker et al. 2023 describes the process of prioritizing objects to be placed on slits. About 250 galaxies were targeted using the 0.6 to 5.3 micron prism with up to 28 hours of exposure. Most of these objects were also targeted using all three R~1000 gratings and the longest wavelength R~2700 grating with up to 7 hours of exposure.

Figure 4 includes sample R~100 Clear/Prism spectra from the first data release (Bunker et al. 2023). Figure 5 displays an example preview image for a Clear/Prism spectra, which are included with this data release.

Update 06/15/23: NIRCam detection and segmentation images included with the JADES release (see below for more information).

JADES images and spectra are available in the MAST Portal (web-based, cross-mission search interface) and Astroquery (Python package to search for and download files from Python scripts you write), and via the direct download table below. Set the Provenance Name filter to JADES in the Portal Advanced Search to find all or individual images.

from astroquery.mast import Observations
all_obs = Observations.query_criteria(provenance_name="jades")
data_products = Observations.get_product_list(all_obs)
Observations.download_products(data_products)

• MAST Portal

  

  A web-based interface for cross-mission searches of data at MAST or the Virtual Observatory

  Portal

• MAST Astroquery

  

  Search for and retrieve JADES data products programmatically.

  MAST Astroquery

Direct Download

Image files can be downloaded directly from the table below based on the filter used.

Spectra files (all, including 1D and 2D) can be downloaded in bundles based on the disperser-filter combination, linked in the table below. For the Clear-Prism disperser-filter combination, a bundle of preview images of both 1D and 2D spectra is also linked. 

Catalog files can be downloaded directly from the table below. The file sizes are all <0.7 GB.