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LSST DP1 FITS products

The Legacy Survey of Space and Time Data Preview 1 (LSST DP1) contains image and catalog products generated by Rubin Science Pipelines v29 from real LSST Commissioning Camera (ComCam) observations of seven fields over seven weeks in 2024. The official release date was June 30, 2025.

Access level

Restricted access

DP1 is proprietary and available only to Rubin data rights holders, under the Rubin Data Policy and RDO-013.

Products available at LIneA

Local inventory

The quantities on this page document the files available in LIneA's infrastructure. They may differ from Rubin's published totals because of the organization and current state of the local copy.

Sky coverage by band

DP1 observed seven fields of approximately one square degree each. Coverage is not the same across bands:

  • u: ECDFS, EDFS, Low Galactic Latitude Field, and Seagull Nebula.
  • g and r: all seven fields.
  • i: all fields except Seagull Nebula.
  • z: Low Ecliptic Latitude Field, ECDFS, EDFS, Low Galactic Latitude Field, and Seagull Nebula.
  • y: 47 Tuc, ECDFS, EDFS, and Low Galactic Latitude Field.

The table gives each field center and the official number of visits per band. Zero means that the field was not observed in that band.

Field Center (RA, Dec; degrees) u g r i z y
47 Tuc Globular Cluster 6.02; −72.08 0 10 32 19 0 5
Low Ecliptic Latitude Field 37.86; 6.98 0 44 40 55 20 0
Fornax Dwarf Spheroidal Galaxy 40.00; −34.45 0 5 25 12 0 0
Extended Chandra Deep Field South (ECDFS) 53.13; −28.10 43 230 237 162 153 30
Euclid Deep Field South (EDFS) 59.10; −48.73 20 61 87 42 42 20
Low Galactic Latitude Field 95.00; −25.00 33 82 84 23 60 10
Seagull Nebula 106.23; −10.51 10 37 43 0 10 0

How to interpret coverage

These figures describe visits observed by Rubin. Deep coadds include only exposures that meet quality criteria; edge patches may contain areas without data, marked by the NO_DATA mask. Local file counts by band are listed in the product tables below.

Official sources: observations and filters, image quality and depth, and coadd processing.

Deep coadd

A band-by-band combination of calibrated, background-subtracted exposures for a sky region, using an inverse-variance-weighted mean. Each file represents a patch in one of the six u, g, r, i, z, and y bands.

  • Format: FITS (.fits)
  • Local inventory: 2,654 files, 166 GB
  • Contents: image (nJy), variance (nJy²), and mask planes, plus PSF, photometric calibration, and WCS metadata
  • Official documentation: Deep coadd, image coaddition, and mask planes
Band Files Size
u 274 16 GB
g 583 37 GB
r 581 39 GB
i 510 32 GB
z 432 28 GB
y 263 15 GB

Deep coadd background

Two-dimensional maps of the sky background measured and subtracted from the deep coadd images.

Band Files Size
u 274 5.5 MB
g 583 12 MB
r 582 12 MB
i 510 11 MB
z 432 8.6 MB
y 263 5.2 MB

Note

deep_coadd_background is preserved in the IDAC-BR copy but has no dedicated product page among the official DP1 image dataset types.

Deep coadd n-image

Two-dimensional maps of the number of exposures stacked into each deep-coadd pixel, useful for evaluating coverage and relative depth.

  • Format: FITS (.fits)
  • Local inventory: 2,721 files, 1.7 GB
  • Related documentation: Deep coadd
Band Files Size
u 280 126 MB
g 594 391 MB
r 601 439 MB
i 520 306 MB
z 444 272 MB
y 271 112 MB

Note

deep_coadd_n_image is preserved in the IDAC-BR copy but is not listed as an independent image dataset type in the official DP1 documentation.

HealSparse FITS maps

Twelve survey-property maps, one file per band (u, g, r, i, z, y), totaling 72 files and 451 MB. They use FITS with the .hsp extension.

Product Description
deepCoadd_dcr_ddec_consolidated_map_weighted_mean Weighted mean DCR displacement in declination
deepCoadd_dcr_dra_consolidated_map_weighted_mean Weighted mean DCR displacement in right ascension
deepCoadd_dcr_e1_consolidated_map_weighted_mean Weighted mean DCR distortion component e1
deepCoadd_dcr_e2_consolidated_map_weighted_mean Weighted mean DCR distortion component e2
deepCoadd_epoch_consolidated_map_max Maximum epoch of contributing exposures
deepCoadd_epoch_consolidated_map_mean Mean epoch of contributing exposures
deepCoadd_epoch_consolidated_map_min Minimum epoch of contributing exposures
deepCoadd_psf_e1_consolidated_map_weighted_mean Weighted mean PSF component e1
deepCoadd_psf_e2_consolidated_map_weighted_mean Weighted mean PSF component e2
deepCoadd_psf_size_consolidated_map_weighted_mean Weighted mean PSF size
deepCoadd_sky_background_consolidated_map_weighted_mean Weighted mean sky-background level
deepCoadd_sky_noise_consolidated_map_weighted_mean Weighted mean sky noise

Inventory limits

This page covers only FITS products currently documented in LIneA's local copy. Official DP1 also provides raw exposures, visit images, template coadds, and difference images that are not recorded as available in these local directories. See the official image-product index.