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  1. Article

    Open Access

    Peering into the dark (ages) with low-frequency space interferometers

    The Dark Ages and Cosmic Dawn are largely unexplored windows on the infant Universe (z ~ 200–10). Observations of the redshifted 21-cm line of neutral hydrogen can provide valuable new insight into fundamental...

    Léon V. E. Koopmans, Rennan Barkana, Mark Bentum, Gianni Bernardi… in Experimental Astronomy (2021)

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    Article

    SARAS 3 CD/EoR radiometer: design and performance of the receiver

    SARAS is an ongoing experiment aiming to detect the redshifted global 21-cm signal expected from Cosmic Dawn (CD) and the Epoch of Reionization (EoR). Standard cosmological models predict the signal to be pres...

    Jishnu Nambissan T., Ravi Subrahmanyan, R. Somashekar… in Experimental Astronomy (2021)

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    Article

    SARAS 2: a spectral radiometer for probing cosmic dawn and the epoch of reionization through detection of the global 21-cm signal

    The global 21-cm signal from Cosmic Dawn (CD) and the Epoch of Reionization (EoR), at redshifts ...

    Saurabh Singh, Ravi Subrahmanyan, N. Udaya Shankar… in Experimental Astronomy (2018)

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    Article

    A digital-receiver for the MurchisonWidefield Array

    An FPGA-based digital-receiver has been developed for a low-frequency imaging radio interferometer, the Murchison Widefield Array (MWA). The MWA, located at the Murchison Radio-astronomy Observatory (MRO) in W...

    Thiagaraj Prabu, K. S. Srivani, D. Anish Roshi, P. A. Kamini… in Experimental Astronomy (2015)

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    Article

    SARAS: a precision system for measurement of the cosmic radio background and signatures from the epoch of reionization

    SARAS is a correlation spectrometer purpose designed for precision measurements of the cosmic radio background and faint features in the sky spectrum at long wavelengths that arise from redshifted 21-cm from g...

    Nipanjana Patra, Ravi Subrahmanyan, A. Raghunathan… in Experimental Astronomy (2013)

  6. No Access

    Article

    The Australia telescope 20 GHz survey: hardware, observing strategy, and scanning survey catalog

    The Australia Telescope 20 GHz (AT20G) survey is a large area (2π sr), sensitive (40 mJy), high frequency (20 GHz) survey of the southern sky. The survey was conducted in two parts: an initial fast scanning surve...

    Paul Jacob Hancock, Paul Roberts, Michael J. Kesteven… in Experimental Astronomy (2011)