Skip to main content Accessibility help
×
Home

BIGHORNS - Broadband Instrument for Global HydrOgen ReioNisation Signal

  • Marcin Sokolowski (a1) (a2), Steven E. Tremblay (a1) (a2), Randall B. Wayth (a1) (a2), Steven J. Tingay (a1) (a2), Nathan Clarke (a1), Paul Roberts (a3), Mark Waterson (a1) (a4), Ronald D. Ekers (a3), Peter Hall (a1), Morgan Lewis (a5), Mehran Mossammaparast (a1) (a2), Shantanu Padhi (a1), Franz Schlagenhaufer (a1), Adrian Sutinjo (a1) and Jonathan Tickner (a1)...

Abstract

The redshifted 21cm line of neutral hydrogen (Hi), potentially observable at low radio frequencies (~50–200 MHz), should be a powerful probe of the physical conditions of the inter-galactic medium during Cosmic Dawn and the Epoch of Reionisation (EoR). The sky-averaged Hi signal is expected to be extremely weak (~100 mK) in comparison to the foreground of up to 104 K at the lowest frequencies of interest. The detection of such a weak signal requires an extremely stable, well characterised system and a good understanding of the foregrounds. Development of a nearly perfectly (~mK accuracy) calibrated total power radiometer system is essential for this type of experiment. We present the BIGHORNS (Broadband Instrument for Global HydrOgen ReioNisation Signal) experiment which was designed and built to detect the sky-averaged Hi signal from the EoR at low radio frequencies. The BIGHORNS system is a mobile total power radiometer, which can be deployed in any remote location in order to collect radio frequency interference (RFI) free data. The system was deployed in remote, radio quiet locations in Western Australia and low RFI sky data have been collected. We present a description of the system, its characteristics, details of data analysis, and calibration. We have identified multiple challenges to achieving the required measurement precision, which triggered two major improvements for the future system.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      BIGHORNS - Broadband Instrument for Global HydrOgen ReioNisation Signal
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      BIGHORNS - Broadband Instrument for Global HydrOgen ReioNisation Signal
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      BIGHORNS - Broadband Instrument for Global HydrOgen ReioNisation Signal
      Available formats
      ×

Copyright

Corresponding author

References

Hide All
Bernardi, G., McQuinn, M., & Greenhill, L. J. 2015, ApJ, 799, 90
Bowman, J. D., & Rogers, A. E. E. 2010, Nature, 468, 796
Bray, J. D., Ekers, R. D., & Roberts, P. 2013, ExA, 36, 155
Burns, J. O., et al. 2012, AdSpR, 49, 433
Chippendale, A. P. 2009, PhD thesis, CSIRO Astronomy and Space Science
CISPR 22. 2008, Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement, 6th edn., International Electrotechnical Commission
Datta, A., Bradley, R., Burns, J. O., Harker, G., Komjathy, A., & Lazio, T. J. W. 2014, arXiv:1409.0513
de Oliveira-Costa, A., Tegmark, M., Gaensler, B. M., Jonas, J., Landecker, T. L., & Reich, P. 2008, MNRAS, 388, 247
Furlanetto, S. R., Oh, S. P., & Briggs, F. H. 2006, PhR, 433, 181
Górski, K. M., Hivon, E., Banday, A. J., Wandelt, B. D., Hansen, F. K., Reinecke, M., & Bartelmann, M. 2005, ApJ, 622, 759
Greenhill, L. J., Kocz, J., Barsdell, B. R., Clark, M. A., & LEDA Collaboration. 2014, in Exascale Radio Astronomy, 10301
Harker, G. J. A., Pritchard, J. R., Burns, J. O., & Bowman, J. D. 2012, MNRAS, 419, 1070
Hitney, H. V., Richter, J. H., Pappert, R. A., Anderson, K. D., & Baumgartner, G. B. Jr., 1985, Proceedings of the IEEE, 73, 265
ITU-R P526-12. 2012, Propagation by diffraction, International Telecommunication Union Radiocommunication Sector
James, C. W., et al. 2011, MNRAS, 410, 885
Johnston, R. H., & McRory, J. 1998, IAPM, 40
Liu, A., Pritchard, J. R., Tegmark, M., & Loeb, A. 2013, PhRvD, 87, 043002
Mellema, G., et al. 2013, ExA, 36, 235
MIL-STD461F. 2007, Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment, Department of Defense
Mirocha, J., Harker, G. J. A., & Burns, J. O. 2013, ApJ, 777, 118
Morales, M. F., & Wyithe, J. S. B. 2010, ARA&A, 48, 127
Morandi, A., & Barkana, R. 2012, MNRAS, 424, 2551
Offringa, A. R., van de Gronde, J. J., & Roerdink, J. B. T. M. 2012, A&A, 539, A95
Parsons, A. R., et al. 2010, AJ, 139, 1468
Patra, N., Subrahmanyan, R., Raghunathan, A., & Udaya Shankar, N. 2013, ExA, 36, 319
Pence, W. D., Chiappetti, L., Page, C. G., Shaw, R. A., & Stobie, E. 2010, A&A, 524, A42
Pritchard, J. R., & Loeb, A. 2008, PhRvD, 78, 103511
Pritchard, J. R., & Loeb, A. 2010, PhRvD, 82, 023006
Pritchard, J. R., & Loeb, A. 2012, RPPh, 75, 086901
Rogers, A. E. E., & Bowman, J. D. 2012, RaSc, 47, 0
Shaver, P. A., Windhorst, R. A., Madau, P., & de Bruyn, A. G. 1999, A&A, 345, 380
Taylor, G. B., et al. 2012, JAI, 1, 50004
Tingay, S. J., et al. 2013, PASA, 30, 7
van, Haarlemet al. 2013, A&A, 556, A2
Vedantham, H. K., Koopmans, L. V. E., de Bruyn, A. G., Wijnholds, S. J., Ciardi, B., & Brentjens, M. A. 2014, MNRAS, 437, 1056
Voytek, T. C., Natarajan, A., Jáuregui García, J. M., Peterson, J. B., & López-Cruz, O. 2014, ApJ, 782, L9
Wyithe, S. 2014, in Advancing Astrophysics with the Square Kilometre Array, Proceedings of Science
Zahn, O., et al. 2012, ApJ, 756, 65

Keywords

Metrics

Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed