SARAS
(Shaped Antenna measurement of the background Radio Spectrum)
(survey aiming at highly-redshifted 21-cm detection)
SARAS
(Shaped Antenna measurement of the background Radio Spectrum)
is a radio survey aimed at detecting
highly redshifted 21-cm line from neutral atomic hydrogen (HI) during
the epoch of reionization (EOR).
It measures the radio background by frequency in the general
vicinity of 100 MHz, looking for a bump that could be the effects of
the 21-cm line (redshifted) from the EOR and before.
The measurement has been repeated with equipment improvements,
the three generations termed SARAS 1, SARAS 2 and SARAS 3.
The latter attempted to reproduce the positive results found by
EDGES, but contradicts them.
(survey,radio,India)
Further reading:
https://physicsworld.com/a/cosmic-dawn-the-search-for-the-primordial-hydrogen-signal/
https://www.adda247.com/upsc-exam/indias-saras-telescope/
https://cosmicvarta.in/saras_telescope_saurabh
https://ui.adsabs.harvard.edu/abs/2013ExA....36..319P/abstract
https://ui.adsabs.harvard.edu/abs/2015ApJ...801..138P/abstract
https://ui.adsabs.harvard.edu/abs/2017ApJ...845L..12S/abstract
https://ui.adsabs.harvard.edu/abs/2018ExA....45..269S/abstract
https://ui.adsabs.harvard.edu/abs/2018ApJ...858...54S/abstract
https://ui.adsabs.harvard.edu/abs/2020JAI.....950006G/abstract
https://arxiv.org/abs/2104.01756
https://ui.adsabs.harvard.edu/abs/2022NatAs...6..607S/abstract
https://ui.adsabs.harvard.edu/abs/2025ExA....60...22A/abstract
https://www.indiascienceandtechnology.gov.in/research/upgraded-saras-observations-cosmic-dawn?field_area_id=
| WaveL | Freq | Photon
Energy | | |
| 1.8m | 175MHz | 724neV | begin | SARAS |
| 3.5m | 87.5MHz | 362neV | end | SARAS |
|
Referenced by page:
21-cm experiment
Index