Value Added Catalogs

In addition to the primary SDSS photometry and spectroscopy, there are a few extra catalogs created by our collaborators that are distributed through the SAS. These Value-Added Catalogs (VACs) are listed below, and include catalogs that were released in earlier data releases.

Spectral Identification of eROSITA Sources DR19: Optical and X-ray properties

Alternative Pipeline Catalog

SurveyWide

STAR

GALAXY

QUASAR

CAS

DR19

Spectral Identification of eROSITA Sources (SPIDERS): SDSS and eROSITA data of targets detected in X-rays by eROSITA and followed-up in the optical with SDSS.

Catarina Aydar, Andrea Merloni and Tom Dwelly

Location on SAS: https://data.sdss.org/sas/dr19/vac/mos/DL1_SDSS_eROSITA

Data model: https://dr19.sdss.org/datamodel/files/DL1_SDSS_EROSITA/VERS

Catalog Data

DR19

This dataset appears in DR19 SkyServer and CasJobs in the following tables:

Abstract

This value added catalog provides data from SPIDERS (Spectral Identification of eROSITA Sources) targets in SDSS DR19, with X-ray data from eROSITA, optical data from SDSS, and some optical/infrared data of public photometric surveys. For each source that was observed in SDSS-V as a target from eROSITA, we provide:

From SDSS: Field, MJD, Catalog ID, Run2D, Target index, Object type, Target flag, Fiber position coordinates, Redshift (with error and warning), Median S/N, Class, Best fit stellar template and properties (spectral type, effective temperature, surface gravity, Ha EW)
From eROSITA: Unique X-ray source identifier, Flux in the full eROSITA band and error, MJD, Morphological classification, Source detection likelihood, X-ray position estimate and positional error

The VAC consists of two files, with DL1_eROSITA_eRASS1 providing data for each co-add spectrum, and DL1_eROSITA_eRASS1_allepoch providing data for stacked spectra (multiple observations of the same object). A detailed description of this VAC is available in section 7.2 of the SDSS DR19 paper.

Catalog last modified: 2025-07-10 03:18:12