SDSS-V Black Hole Mapper
@blackholemapper.bsky.social
Member of @sdsssurveys. Exploring quasars across the Universe. Continuing some of the work of @eBOSS… and much more!
We are releasing a value added catalog of updated redshifts and classifications of Fermi-detected sources within SDSS-V using multi-component fits. www.sdss.org/dr20/data_ac... arxiv.org/abs/2607.26175
Value Added Catalogs - SDSS
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 lis...
sdss.org
We are releasing a value added catalog of spectral identification of eROSITA sources in DR20 including optical and X-ray properties. www.sdss.org/dr20/data_ac...
Value Added Catalogs - SDSS
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 lis...
sdss.org
We are releasing a value added catalog that disentangles the influence of the host galaxy in quasar spectra as presented in Negrete+2025. www.sdss.org/dr20/data_ac... ui.adsabs.harvard.edu/abs/2025MNRA...
Value Added Catalogs - SDSS
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 lis...
sdss.org
We are releasing a value added catalog (DR20Q_prop) of SDSS DR20 quasar spectral properties for 243,258 quasars. www.sdss.org/dr20/data_ac...
Value Added Catalogs - SDSS
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 lis...
sdss.org
We are releasing a value added catalog of optical spectral properties of X-ray selected AGN in the eFEDS fields, with associated X-ray and multiwavelength photometric public data: www.sdss.org/dr20/data_ac... doi.org/10.1051/0004...
Value Added Catalogs - SDSS
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 lis...
sdss.org
Mapping Monsters: SDSS-V Data Release 20 Unveils All-Sky Views of Supermassive Black Holes - SDSS www.sdss.org/black-hole-m...
Mapping Monsters: SDSS-V Data Release 20 Unveils All-Sky Views of Supermassive Black Holes - SDSS
The Black Hole Mapper reaches a milestone with its first southern hemisphere optical observations, coordinated eROSITA X-ray identification, and multi-epoch tracking of accreting black holes across th...
sdss.org
We are releasing a value added Visual Inspection Catalog of DR20 BOSS spectra including redshifts, classifications, and confidence flags for BOSS ‘allepoch’ coadded spectra. www.sdss.org/dr20/data_ac...
Value Added Catalogs - SDSS
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 lis...
sdss.org
We are releasing several Jupyter Notebook style tutorials to help you use the new SDSS-V DR20 data: www.sdss.org/dr20/bhm/tut... github.com/sdss/dr20_tu...
BHM Tutorials - SDSS
The BHM survey focuses on the study of quasars and other AGN observed with the BOSS spectrograph. To support this science, the survey supplies a number of spectra and summary files that include parame...
sdss.org
SDSS-V DR20 includes the first release of BOSS spectra for the southern sky taken from LCO
We are releasing a total of 1.1M BOSS spectra in DR20 for ~490,000 distinct objects primarily targeted for spectroscopy by BHM, a 3-4x expansion vs DR19. www.sdss.org/dr20/bhm/dat... www.sdss.org/dr20/bhm/dat...
BHM Data - SDSS
New data for BHM in DR20 BOSS spectra SDSS DR20 includes the release of a total of ~1.1M spectra for ~490,000 distinct objects primarily targeted for spectroscopy by BHM (a 3-4x expansion vs. DR19). T...
sdss.org
Big day for us today at the Sloan Digital Sky Surveys: it's Data Release Day! Our twentieth(!!!) data release will go out later today, with lots of spectra and catalogs of stars, galaxies and quasars, and some new webtools! Our DR20 paper has all the details: arxiv.org/abs/2607.26149 #DR20
The Twentieth Data Release of the Sloan Digital Sky Survey: First All-Sky BOSS Spectra, eROSITA-SDSS-V Mapper Coordinated Observations, and a Preview of the Local Volume Mapper
This paper presents the twentieth data release (DR20) from the Sloan Digital Sky Survey, the third data release of its fifth generation (SDSS-V). SDSS-V is a panoptic spectroscopy survey that is mappi...
arxiv.org
Thank you to AAS Nova for highlighting the recent SDSS-V overview paper! Check out their article (and the overview paper!) to learn how SDSS is expanding our view of the universe through panoptic, spectroscopic mapping of the night sky. 🌌
Sloan Digital Sky Surveys@sdssurveys.bsky.social · 3mo agoThank you to AAS Nova for highlighting the recent SDSS-V overview paper! Check out their article (and the overview paper!) to learn how SDSS is expanding our view of the universe through panoptic, spectroscopic mapping of the night sky. 🌌
All @blackholemapper.bsky.social science programs are available here, www.sdss.org/dr19/bhm/pro..., and they include time domain programs such AQMES (All-Quasar Multi-Epoch Spectroscopy and reverberation mapping, X-ray follow-up programs.
@blackholemapper.bsky.social had already released a few spectra in DR18, but they are going all out for DR19, with lots of galaxy and quasar spectra #DR19
Black Hole Mapper also has a range of tutorials available to get you started working on the data: www.sdss.org/dr19/tutoria... #DR19
Tutorials - SDSS
Welcome to the SDSS tutorial section. This section contains a series of hands-on tutorials to learn how to work with different aspects of the SDSS data. If you are unsure what kind of SDSS data or whi...
sdss.org
Yesterday we released our nineteenth data release into the wild: www.sdss.org/dr19, let’s now take a closer look on what is in this data release. #DR19
First we have a tutorial around some basic themes relating to @blackholemapper.bsky.social . This introduces quasar spectra and redshift before moving in to time domain astronomy and looking at spectroscopic variability. You can find it here www.sdss.org/dr19/tutoria... 2/4
BHM In the Classroom - SDSS
This notebook aims to introduce some topics around quasar spectra, redshift and spectral variability. It is suitable for introductory level physics or astronomy majors at the tertiary level but could ...
sdss.org
SDSS-V Black Hole Mapper is releasing “The Sloan Digital Sky Survey DR19 quasar spectral property catalog” www.sdss.org/dr19/data_ac...
Value Added Catalogs - SDSS
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 lis...
sdss.org
SDSS-V Black Hole Mapper is releasing the “Spectral Identification of eROSITA Sources DR19: Optical and X-ray properties” www.sdss.org/dr19/data_ac...
Value Added Catalogs - SDSS
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 lis...
sdss.org
We are releasing several new Jupyter Notebook style tutorials to help you use the new SDSS-V DR19 data: www.sdss.org/dr19/bhm/tut... github.com/sdss/dr19_tu...
BHM Tutorials - SDSS
The BHM survey focuses on the study of quasars and other AGN observed with the BOSS spectrograph. To support this science, the survey supplies a number of spectra and summary files that include parame...
sdss.org
We have a data release! Check out sdss.org/dr19 for all the data that just became publicly available with our 19th data release #DR19
Data Release 19 - SDSS
DR19 is the second data release for the fifth phase of the Sloan Digital Sky Survey (SDSS-V). Its content is described in detail on the DR19 data release paper. What's New in DR19 Data Access Scope DR...
sdss.org
We are releasing a total of ~380,000 BOSS spectra in DR19 for ~120,000 distinct objects primarily targeted for spectroscopy by BHM, an order of magnitude expansion vs. DR18. www.sdss.org/dr19/bhm/dat... www.sdss.org/dr19/bhm/dat...
BHM Data - SDSS
Previous SDSS data most relevant to BHM Please also see earlier SDSS data releases, including DR16, DR17, and DR18 which e.g., include BHM relevant science and data, from other earlier SDSS programs a...
sdss.org
Today is a big day for us: it's DATA RELEASE DAY!!! And to celebrate our nineteenth data release, we have not one, but two papers for you to read all about our data: we have a DR19 paper (arxiv.org/abs/2507.07093) and an SDSS-V Overview paper (arxiv.org/abs/2507.06989) #DR19
Sloan Digital Sky Survey-V: Pioneering Panoptic Spectroscopy
The Sloan Digital Sky Survey-V (SDSS-V) is pioneering panoptic spectroscopy: it is the first all-sky, multi-epoch, optical-to-infrared spectroscopic survey. SDSS-V is mapping the sky with multi-object...
arxiv.org
This week's BHM science paper highlight is "The SDSS-V Black Hole Mapper Reverberation Mapping Project: A Kinematically Variable Broad-Line Region and Consequences for Masses of Luminous Quasars", by @loganfries Fries et al. (2024). ui.adsabs.harvard.edu/abs/2024arXi... (1/3)
The SDSS-V Black Hole Mapper Reverberation Mapping Project: A Kinematically Variable Broad-Line Region and Consequences for Masses of Luminous Quasars
We present a velocity-resolved reverberation mapping analysis of the hypervariable quasar RM160 (SDSS J141041.25+531849.0) at z = 0.359 with 153 spectroscopic epochs of data representing a ten-year ba...
ui.adsabs.harvard.edu
This week's BHM paper highlight is "Exploring Changing-look Active Galactic Nuclei with the Sloan Digital Sky Survey V: First Year Results" by Zeltyn et al. (2024). The paper can be found here: arxiv.org/abs/2401.01933 (1/3)
Exploring Changing-look Active Galactic Nuclei with the Sloan...
"Changing-look" active galactic nuclei (CL-AGNs) challenge our basic ideas about the physics of accretion flows and circumnuclear gas around supermassive black holes. Using first-year Sloan...
arxiv.org
This week's BHM paper highlight is "The SDSS-V Black Hole Mapper Reverberation Mapping Project: CIV BAL Acceleration in the Quasar SBS 1408+544" by Wheatley et al. (2024). The paper can be found here: arxiv.org/abs/2406.08622 (1/3)
The SDSS-V Black Hole Mapper Reverberation Mapping Project: CIV...
We present the results of an investigation of a highly variable CIV broad absorption-line feature in the quasar SBS 1408+544 (z=2.337) that shows a significant shift in velocity over time. This...
arxiv.org
This week's BHM paper highlight is "The eROSITA Final Equatorial Depth Survey (eFEDS): The Hard X-ray Selected Sample" by K. Nandra et al (2024). The paper can be found here: ui.adsabs.harvard.edu/abs/2024arXi...
The eROSITA Final Equatorial Depth Survey (eFEDS): the hard X-ray selected sample
During its calibration and performance verification phase, the eROSITA instrument aboard the SRG satellite performed a uniform wide--area X-ray survey of approximately 140 deg$^{2}$ in a region of the...
ui.adsabs.harvard.edu
After a bit of a hiatus, we are returning with more weekly-ish BHM Science Paper Highlights! This week's paper highlight is "Compact White Dwarf Binaries in the combined SRG/eROSITA/SDSS eFEDs Survey", by A. Schwope et al. (2024): arxiv.org/abs/2401.17304 1/3
Compact white-dwarf binaries in the combined SRG/eROSITA/SDSS eFEDS survey
Aims. Compact white-dwarf binaries are selected from spectra obtained in the early SDSS-V plate program. A dedicated set of SDSS plate observations were carried out in the eFEDS field, providing...
arxiv.org
This week's BHM paper highlight is "The Cosmic Web of X-ray Active Galactic Nuclei seen through the eROSITA Final Equatorial Depth Survey (eFEDS)", by Johan Comparat et al. (2023). The paper can be found here: arxiv.org/abs/2301.01388 1/3
The cosmic web of X-ray active galactic nuclei seen through the...
Which galaxies in the general population turn into active galactic nuclei (AGNs) is a keystone of galaxy formation and evolution. Thanks to SRG/eROSITA's contiguous 140 square degree pilot survey...
arxiv.org