Astronomers Dig Out Buried Black Holes With NASA's Chandra
chandra_794b January 11th, 2023
Credit: X-ray: NASA/CXC/SAO/D. Kim et al.; Optical/IR: Legacy Surveys/D. Lang (Perimeter Institute)
A survey has revealed hundreds of previously unidentified black holes using data from the Chandra Source Catalog and the Sloan Digitized Sky Survey (SDSS). Researchers compared the X-ray and optical data for a class of objects known as "XBONGs" (X-ray bright, optically normal galaxies) to reveal about 400 supermassive black holes. This four-panel graphic shows two of these XBONGs in X-rays from Chandra and optical light from SDSS. This result helps explain some unusual properties of XBONGs as well as provide a more accurate census of supermassive black holes that exist in the centers of most large galaxies.
Provider: Chandra X-ray Observatory
Image Source: http://chandra.harvard.edu/photo/2023/xbongs/
Curator: Chandra X-ray Observatory, Cambridge, MA, USA
Image Use Policy: http://chandra.harvard.edu/photo/image_use.html
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Image Details
Position Details
Color Mapping
- ID
- 794b
- Subject Category
- Subject Name
- XBONGS
- Credits
- X-ray: NASA/CXC/SAO/D. Kim et al.; Optical/IR: Legacy Surveys/D. Lang (Perimeter Institute)
- Release Date
- 2023-01-11
- Lightyears
- Redshift
- Reference Url
- http://chandra.harvard.edu/photo/2023/xbongs/
- Type
- Observation
- Image Quality
- Good
- Distance Notes
- Facility
- Chandra X-ray Observatory, KPNO-4m
- Instrument
- ACIS, DESI
- Color Assignment
- Purple, Pseudocolor
- Band
- X-ray, Optical
- Bandpass
- Central Wavelength
- Start Time
- 2003-04-03-0000, -
- Integration Time
- 19800, -
- Dataset ID
- 5906, 7263, 7264, 16192, 16193, 16194, 16195, 16196, 16197, 16198, 16199, 16200, 16201, 16202, 16203, 16442, 16443, 16444, 16445, 16446, 16447, 16448, 16449, 16612, 16615, 16616, 16617, 16621, 16640, 17413, 17414, 17486, 17544, 17545, 17555, 17561, 17562, 17602, 17603, 17640, 17641, 17642, 17660, 18670, 18671, 18672, 18706, 18720, 18721, 18722, 18729, 18749, 18750
- Notes
- Coordinate Frame
- ICRS
- Equinox
- J2000
- Reference Value
- 239.11541666666668, 24.299722222222226
- Reference Dimension
- Reference Pixel
- Scale
- Rotation
- Coordinate System Projection:
- Quality
- Position
- FITS Header
- Notes
- Creator (Curator)
- Chandra X-ray Observatory
- URL
- http://chandra.harvard.edu
- Name
- cxcpub@cfa.harvard.edu
- Telephone
- 617.496.7941
- Address
- 60 Garden St.
- City
- Cambridge
- State/Province
- MA
- Postal Code
- 02138
- Country
- USA
- Rights
- http://chandra.harvard.edu/photo/image_use.html
- Publisher
- Chandra X-ray Center
- Publisher ID
- chandra
- Resource ID
- xbongs_3984.tif
- Resource URL
- http://chandra.harvard.edu/photo/2023/xbongs/xbongs_3984.tif
- Related Resources
- Metadata Date
- 2024-04-26T13:08:16-04:00
- Metadata Version
- 1.2
Detailed color mapping information coming soon...
