Photo-z Server Data¶
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Page under construction. Some content may be incomplete.
The Photo-z Server (PZ Server) is a web-based platform developed by LIneA as part of Brazil’s in-kind contribution to the Rubin Observatory LSST project.
The Photo-z Server administrators maintain and periodically update a curated list of data resources to support the LSST Community with photo-z-related data products. This page provides an overview of some datasets available on the Photo-z Server along with access instructions. For more details on the platform’s features and functionalities, please refer to the full Photo-z Server User Documentation.
Restricted Access
In accordance with the Rubin Observatory and IDAC-BR Data Policies, access to LSST data — including derived products hosted on the Photo-z Server — is restricted to authorized LSST Community members with valid RSP accounts.
Datasets classification¶
Official Datasets
The official datasets will be produced by Rubin's Data Management team and will be available to the LSST Community through the Photo-z Server. These datasets will include reference redshift catalogs, training sets, and photo-z estimates associated with the LSST data releases. The datasets will be released in a phased manner, starting with the first data release (DR1) and continuing with subsequent releases as the LSST survey progresses.
For now, the Rubin Observatory PZ Data Products page is empty.
Unofficial Datasets
Besides data uploaded by users, the User-generated Data Products page hosts set of datasets that were prepared by the LIneA team for educational purposes, to serve as use case examples for the Photo-z Server tutorials. In addition, the DP1 datasets generated by PZ Science Unit from Rubin’s Commissioning Team, described in the tech note SITCOMTN-154 are also available there. All these datasets are not classified as Official Datasets.
Data Preview 1¶
ATTENTION: Preliminary Datasets
These datasets were produced by the PZ Science Unit — a working group from Rubin’s Commissioning Team — during the Initial studies of photometric redshifts with LSSTComCam from DP1. All results, along with detailed dataset descriptions, are available in the tech note SITCOMTN-154.
These datasets are NOT classified as Official Datasets released by Rubin's DM team.
The datasets described in the tech note are available in the Photo-z Server as data products with SITCOMTN-154 suffix. Their links and short description are organized in product types below.
Object Catalogs¶
Data products containing object tables described in Section 2.1 and listed in Table 1 from the tech note SITCOMTN-154.
| Data Product | Data set | Selection | Number of objects |
|---|---|---|---|
| DP1 (available in the RSP) | Complete DP1 Object Catalog | None | 2,299,757 |
| ECDFS+EDFS+SV_95 gold SITCOMTN-154 | ECDFS+EDFS+SV_95 | gold | 375,610 |
| SV_38 gold_4_band SITCOMTN-154 | SV_38 | gold_4_band | 169,034 |
All DP1 fields comprehensive Gold dataset beyond the fields ECDFS+EDFS+SV_95 and SV_38, where spectroscopic data are available (dataset not listed in Table 1 from the tech note SITCOMTN-154):
| Data Product | Data set | Selection | Number of objects |
|---|---|---|---|
| DP1 Gold all | All fields | gold | 686,334 |
Reference Redshift Catalogs¶
Reference Redshift Catalogs from Individual Surveys¶
Data products containing reference redshifts catalogs (before matching with DP1 Object table) separated by the origin survey as listed in Table 2 from the tech note SITCOMTN-154.
Note: These datasets are already filtered to the ECDFS field and cleaned with the selection criteria described in Section 2.2.1 from the tech note SITCOMTN-154. For the complete original catalogs, please go to the External datasets section below.
Additional spectroscopic data from DESI DR1 were used as an independent test set for validating the photo-z estimates. Since DESI DR1 is a very large dataset that extends beyond the DP1 footprint, it was filtered to include only the ECDFS field.
| Data Product | Reference | Number of Redshifts |
|---|---|---|
| DESI DR1 inside DP1 footprint | DESI Collaboration et al. (2025) | 50,634 |
Combined Redshift Catalog¶
A single file containing all reference redshifts combined from the individual surveys listed above (excluding DESI), as described in Section 2.2.1 of the technical note SITCOMTN-154.
| Data Product | Number of Redshifts |
|---|---|
| ComCam ECDFS z catalog SITCOMTN-154 | 104,070 |
Training and Test Sets¶
On the Photo-z Server, the product type "Training Set" comprehends all samples resulting from the matching between a reference redshift and an object catalog. That might include training and test sets together in a same file or independent sub-samples uploaded separately. For the latter, both training and test sets are tagged as "Training Set".
Data products containing training and test sets generated from the ComCam ECDFS z catalog listed in Table 1 from the tech note SITCOMTN-154 are:
| Data Product | Data set | Selection | Number of objects |
|---|---|---|---|
| training_v1 match_prelim SITCOMTN-154 | training_v1 | match_prelim | 7,000 |
| test_v1 match_prelim SITCOMTN-154 | test_v1 | match_prelim | 2,437 |
| training_v4 match_ecdfs SITCOMTN-154 | training_v4 | match_ecdfs | 6,778 |
| test_v4 match_ecdfs SITCOMTN-154 | test_v4 | match_ecdfs | 2,905 |
| test_DESI match_desi SITCOMTN-154 | test_DESI | match_desi | 2,728 |
Training Results¶
Estimator data models listed in Table 7 and described in the Appendix A.3 from the tech note SITCOMTN-154.
Configuration Files
As mentioned in Section 3.4 and Appendix A.1 from the tech note SITCOMTN-154, the configuration files dp1.yaml (complete set of configurations tested, labeled as analysis flavors) and dp1_v4.yaml (optimized configuration parameters) are available on the GitHub repository rail_project_config.
Validation Results¶
Photo-z point estimates, QP Ensaembles, and evaluation metrics related to the results shown in Table 4. Files uploaded from directories listed in Table 7 and described in the Appendix A.4 from the tech note SITCOMTN-154.
Legend
In preparation
Photo-z Estimates¶
Photo-z Tables¶
PZ tables produced as part of the initial studies with commissioning data described in SITCOMTN-154. Data uploaded from the directories listed in Table 7.
| Data Product | Number of objects |
|---|---|
| PZ table dp1_all gold baseline SITCOMTN-154 | 686,334 |
| PZ table dp1_sv38 gold baseline SITCOMTN-154 | 169,034 |
| PZ table DESI gold baseline | 2728 |
| PZ table dp1_all gold dp1_optimize | |
| PZ table dp1_sv_38 gold dp1_optimize | |
| PZ table dp1_all gold dp1_optimize 4band | |
| PZ table dp1_sv_38 gold dp1_optimize 4band |
Legend
In preparation
External datasets¶
Public data collected from the literature and hosted on the Photo-z Server.
Reference Redshift Catalogs¶
Individual Surveys¶
The PZ Server hosts several public spectroscopic redshift catalogs from different surveys that can be used as reference datasets for training and validation of photo-z estimates. The data products listed below are the original catalogs, without any filter or data selection.
| Data Product | Reference | Number of Redshifts | Status |
|---|---|---|---|
| 2dFGRS Final Data Release | Colless et al. (2001) | 245,591 | |
| 2dFLens | Blake et al. (2016) | 70,079 | |
| 2MRS v240 | Huchra et al. (2012) | 240,496 | |
| 3D-HST v415 | Momcheva et al. (2016) | 207,967 | |
| 6dFGS DR3 | Jones et al. (2009) | 136,304 | |
| ACES | - | - | |
| ATLAS | - | - | |
| ASTRODEEP | - | - | |
| ASTRODEEP-JWST | - | - | |
| C3R2 DR3 | - | - | |
| CANUCS SMACS | - | - | |
| CDB | - | - | |
| CLASH-VLT FR | - | - | |
| COSMOS 2025 | - | - | |
| DEEP2 DR4 | - | - | |
| DEIMOS 10K | - | - | |
| DESI EDR | DESI Collaboration et al. (2025) | 2,451,325 | |
| DESI DR1 (Inside DP1) | DESI Collaboration et al. (2025) | 50,634 | |
| Euclid Q1 SPE | - | - | |
| FMOS-COSMOS | - | - | |
| AMA DR4 | - | - | |
| GLASS | - | - | |
| HectoMAP DR2 | - | - | |
| HETDEX DR1 | - | - | |
| JADES DR3 | D’Eugenio et al. (2025) | 8,172 | |
| LEGA-C DR3 | - | - | |
| MOSDEF (MOSFIRE) FR | - | - | |
| MUSE DR1 | - | - | |
| OzDES DR2 | Lidman et al. (2020) | 38,624 | |
| PRIMUS DR1 | Cool et al. (2013) | 213,696 | |
| SAGA DR2 | - | ||
| SDSS DR17 | - | ||
| SpARCS | - | ||
| SPT-GMOS | - | ||
| UDS | - | ||
| VANDELS DR4 | Garilli et al. (2021) | 2,165 | |
| VIPERS | - | - | |
| VLT-VIMOS v201 | Balestra et al. (2010) | 5,052 | |
| VUDS | - | - | |
| VVDS Final Data Release | Le Fèvre et al. (2005) | 40,944 | |
| WiggleZ | - | - | |
| zCOSMOS 20k/10k | - | - | |
| ZFIRE | - | - |
Legend
Planned In preparation Available
Combined catalogs¶
| Data product | Release Date | # of surveys | # of redshifts | Status |
|---|---|---|---|---|
| All combined redshifts | Nov 2025 | - | - | |
| Combined redshifts in DP1 footprint | Nov 2025 | - | - |
Legend
Planned In preparation Available
Training Sets¶
The result of the spatial cross-matching between the redshift compilations and LSST photometric data.
| Data product | Release Date | # of galaxies | Status |
|---|---|---|---|
| DP1 matched | Nov 2025 | - |
Legend
Planned In preparation Available