Spectra from faint, distant galaxies
eso_eso0212b April 9th, 2002
Credit: ESO
The spectra (brightness as a function of wavelength) for ten of the confirmed galaxies in the very distant, young cluster found near the radio galaxy TN J1338-1942 . Each galaxy displays a sharp peak in colour showing the signature of its hydrogen gas - this is the redshifted Lyman-alpha emission line. The galaxy spectra shown were obtained by FORS2 in the MXU-mode on May 20, 21 and 22, 2001. Exposures of 31500 seconds and 35100 seconds, respectively, were made through two masks under photometric conditions, with seeing 1.0 arcsec and slit sizes of 1 arcsec. The 600RI grism was used; it has peak efficiency 87%, resolution R = 1011 at 663.0 nm and spectral dispersion of 0.132 nm/pixel, corresponding to 290 km/s at z = 4.1.
Provider: European Southern Observatory
Image Source: https://www.eso.org/public/images/eso0212b/
Curator: European Southern Observatory, Garching bei München, Germany
Image Use Policy: Creative Commons Attribution 4.0 International License
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Image Details
Color Mapping
- ID
- eso0212b
- Subject Category
- D.5.3.2
- Subject Name
- TN J1338-1942
- Credits
- ESO
- Release Date
- 2002-04-09T00:00:00
- Lightyears
- Redshift
- Reference Url
- https://www.eso.org/public/images/eso0212b/
- Type
- Observation
- Image Quality
- Distance Notes
- Facility
- Very Large Telescope
- Instrument
- FORS2
- Color Assignment
- Grayscale
- Band
- Optical
- Bandpass
- R
- Central Wavelength
- Start Time
- Integration Time
- Dataset ID
- Notes
- Coordinate Frame
- Equinox
- Reference Value
- Reference Dimension
- 999.0, 680.0
- Reference Pixel
- Scale
- Rotation
- Coordinate System Projection:
- Quality
- FITS Header
- Notes
- Creator (Curator)
- European Southern Observatory
- URL
- http://www.eso.org/
- Name
- Telephone
- Address
- Karl-Schwarzschild-Strasse 2
- City
- Garching bei München
- State/Province
- Postal Code
- D-85748
- Country
- Germany
- Rights
- Creative Commons Attribution 4.0 International License
- Publisher
- European Southern Observatory
- Publisher ID
- eso
- Resource ID
- eso0212b
- Resource URL
- https://www.eso.org/public/archives/images/original/eso0212b.tif
- Related Resources
- Metadata Date
- 2010-03-01T09:50:01+01:00
- Metadata Version
- 1.1
Detailed color mapping information coming soon...
