Data Access

Data Release 3

SAGA Data Release 3 includes: (1) 378 satellites identified across 101 MW-mass systems, (2) a list of likely satellite candidates, and (3) a redshift catalog of more than 76,000 background galaxies (including 46,000 taken by SAGA) in the SAGA footprint of 84.7 sq. deg The schema of these data tables are available in our Paper III (Mao+ 2024). The content of these tables will be made available in a matching-readable format at the publication of Paper III.

In the meantime, you are interested in accessing DR3 data, please contact SAGA members. You can also access our DR2 data following the instructions below.

If you use SAGA DR3 data in your research, please cite the relevent papers:

Paper III: Mao et al. (2024): if you use any SAGA DR3 data/results
Paper IV: Geha et al. (2024): if you use any SAGA satellite star formation rate measurements
Paper V: Wang et al. (2024): if you compare with UM-SAGA prediction
SAGA-bg1: Kado-Fong et al. (2024): if you use any line flux measurements for SAGA satellite
Paper II: Mao et al. (2021): if you use any SAGA DR2 (Stage II) data/results, or discuss the Survey target selection<
Paper I: Geha et al. (2017): if you use any SAGA DR1 (Stage I) data/results, or discuss the Survey design

In addition, please also acknowledge the SAGA Survey:

This research used data from the SAGA Survey (Satellites Around Galactic Analogs; sagasurvey.org). The SAGA Survey is a galaxy redshift survey with spectroscopic data obtained by the SAGA Survey team with the Anglo-Australian Telescope, MMT Observatory, Palomar Observatory, W. M. Keck Observatory, and the South African Astronomical Observatory (SAAO). The SAGA Survey also made use of many public data sets, including: imaging data from the Sloan Digital Sky Survey (SDSS), the Dark Energy Survey (DES), the GALEX Survey, and the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys, which includes the Dark Energy Camera Legacy Survey (DECaLS), the Beijing-Arizona Sky Survey (BASS), and the Mayall z-band Legacy Survey (MzLS); redshift catalogs from SDSS, DESI, the Galaxy And Mass Assembly (GAMA) Survey, the Prism Multi-object Survey (PRIMUS), the VIMOS Public Extragalactic Redshift Survey (VIPERS), the WiggleZ Dark Energy Survey (WiggleZ), the 2dF Galaxy Redshift Survey (2dFGRS), the HectoMAP Redshift Survey, the HETDEX Source Catalog, the 6dF Galaxy Survey (6dFGS), the Hectospec Cluster Survey (HeCS), the Australian Dark Energy Survey (OzDES), the 2-degree Field Lensing Survey (2dFLenS), and the Las Campanas Redshift Survey (LCRS); HI data from the Arecibo Legacy Fast ALFA Survey (ALFALFA), the FAST all sky HI Survey (FASHI), and HI Parkes All-Sky Survey (HIPASS); and compiled data from the NASA-Sloan Atlas (NSA), the Siena Galaxy Atlas (SGA), the HyperLeda database, and the Extragalactic Distance Database (EDD). The SAGA Survey was supported in part by NSF collaborative grants AST-1517148 and AST-1517422 and Heising–Simons Foundation grant 2019-1402. SAGA Survey's full acknowledgments can be found at https://sagasurvey.org/ack/.

Data Release 2

SAGA Data Release 2 (Stage II) is available as CSV files: host table, satellite table; or as Google Sheets. You can access these data easily with Python and astropy:

from astropy.table import Table, join
saga_hosts = Table.read('https://sagasurvey.org/data/saga_stage2_hosts.csv')
saga_sats = Table.read('https://sagasurvey.org/data/saga_stage2_sats.csv')
saga_joined = join(saga_sats, saga_hosts, 'INTERNAL_HOSTID', 'left',
                    uniq_col_name='{table_name}{col_name}',
                    table_names=['', 'HOST_'])

If you use SAGA Stage II data in your research, please cite Geha et al. (2017, ApJ) and Mao et al. (2021, ApJ), and acknowledge the SAGA Survey:

This research made use of data from the SAGA Survey (sagasurvey.org). The SAGA Survey is a spectroscopic survey with data obtained from the Anglo-Australian Telescope, the MMT Observatory, and the Hale Telescope at Palomar Observatory. The SAGA Survey made use of public imaging data from the Sloan Digital Sky Survey (SDSS), the DESI Legacy Imaging Surveys, and the Dark Energy Survey, and also public redshift catalogs from SDSS, GAMA, WiggleZ, 2dF, OzDES, 6dF, 2dFLenS, and LCRS. The SAGA Survey was supported by NSF collaborative grants AST-1517148 and AST-1517422 and by Heising–Simons Foundation grant 2019-1402.