The performance and calibration of the CRAFT fly’s eye fast radio burst survey
The Commensal Real-time Australian Square Kilometre Array Pathfinder Fast Transients survey is the first extensive astronomical survey using phased array feeds. Since January 2017, it has been searching for fast radio bursts in fly’s eye mode. Here, we present a calculation of the sensitivity and to...
| Main Authors: | , , , , , , , , , , , , , , , |
|---|---|
| Format: | Journal article |
| Published: |
Cambridge University Press
2019
|
| _version_ | 1826294865785257984 |
|---|---|
| author | James, C Bannister, K Macquart, J Ekers, R Oslowski, S Shannon, R Allison, J Chippendale, A Collier, J Franzen, T Hotan, A Leach, M McConnell, D Pilawa, M Voronkov, M Whiting, M |
| author_facet | James, C Bannister, K Macquart, J Ekers, R Oslowski, S Shannon, R Allison, J Chippendale, A Collier, J Franzen, T Hotan, A Leach, M McConnell, D Pilawa, M Voronkov, M Whiting, M |
| author_sort | James, C |
| collection | OXFORD |
| description | The Commensal Real-time Australian Square Kilometre Array Pathfinder Fast Transients survey is the first extensive astronomical survey using phased array feeds. Since January 2017, it has been searching for fast radio bursts in fly’s eye mode. Here, we present a calculation of the sensitivity and total exposure of the survey that detected the first 20 of these bursts, using the pulsars B1641-45 and B0833-45 as calibrators. The beamshape, antenna-dependent system noise, and the effects of radio-frequency interference and fluctuations during commissioning are quantified. Effective survey exposures and sensitivities are calculated as a function of the source counts distribution. Statistical ‘stat’ and systematics ‘sys’ effects are treated separately. The implied fast radio burst rate is significantly lower than the 37 sky−1 day−1 calculated using nominal exposures and sensitivities for this same sample by Shannon et al. (2018). At the Euclidean (best-fit) power-law index of −1.5 (−2.2), the rate is (sys) ± 3.6 (stat) sky−1 day−1 ( (sys) ± 2.8 (stat) sky−1 day−1) above a threshold of 56.6 ± 6.6(sys) Jy ms (40.4 ± 1.2(sys) Jy ms). This strongly suggests that these calculations be performed for other FRB-hunting experiments, allowing meaningful comparisons to be made between them. |
| first_indexed | 2024-03-07T03:52:17Z |
| format | Journal article |
| id | oxford-uuid:c1ada8bb-64b4-4061-9ade-0e71787bb253 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:52:17Z |
| publishDate | 2019 |
| publisher | Cambridge University Press |
| record_format | dspace |
| spelling | oxford-uuid:c1ada8bb-64b4-4061-9ade-0e71787bb2532022-03-27T06:03:23ZThe performance and calibration of the CRAFT fly’s eye fast radio burst surveyJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c1ada8bb-64b4-4061-9ade-0e71787bb253Symplectic Elements at OxfordCambridge University Press2019James, CBannister, KMacquart, JEkers, ROslowski, SShannon, RAllison, JChippendale, ACollier, JFranzen, THotan, ALeach, MMcConnell, DPilawa, MVoronkov, MWhiting, MThe Commensal Real-time Australian Square Kilometre Array Pathfinder Fast Transients survey is the first extensive astronomical survey using phased array feeds. Since January 2017, it has been searching for fast radio bursts in fly’s eye mode. Here, we present a calculation of the sensitivity and total exposure of the survey that detected the first 20 of these bursts, using the pulsars B1641-45 and B0833-45 as calibrators. The beamshape, antenna-dependent system noise, and the effects of radio-frequency interference and fluctuations during commissioning are quantified. Effective survey exposures and sensitivities are calculated as a function of the source counts distribution. Statistical ‘stat’ and systematics ‘sys’ effects are treated separately. The implied fast radio burst rate is significantly lower than the 37 sky−1 day−1 calculated using nominal exposures and sensitivities for this same sample by Shannon et al. (2018). At the Euclidean (best-fit) power-law index of −1.5 (−2.2), the rate is (sys) ± 3.6 (stat) sky−1 day−1 ( (sys) ± 2.8 (stat) sky−1 day−1) above a threshold of 56.6 ± 6.6(sys) Jy ms (40.4 ± 1.2(sys) Jy ms). This strongly suggests that these calculations be performed for other FRB-hunting experiments, allowing meaningful comparisons to be made between them. |
| spellingShingle | James, C Bannister, K Macquart, J Ekers, R Oslowski, S Shannon, R Allison, J Chippendale, A Collier, J Franzen, T Hotan, A Leach, M McConnell, D Pilawa, M Voronkov, M Whiting, M The performance and calibration of the CRAFT fly’s eye fast radio burst survey |
| title | The performance and calibration of the CRAFT fly’s eye fast radio burst survey |
| title_full | The performance and calibration of the CRAFT fly’s eye fast radio burst survey |
| title_fullStr | The performance and calibration of the CRAFT fly’s eye fast radio burst survey |
| title_full_unstemmed | The performance and calibration of the CRAFT fly’s eye fast radio burst survey |
| title_short | The performance and calibration of the CRAFT fly’s eye fast radio burst survey |
| title_sort | performance and calibration of the craft fly s eye fast radio burst survey |
| work_keys_str_mv | AT jamesc theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT bannisterk theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT macquartj theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT ekersr theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT oslowskis theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT shannonr theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT allisonj theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT chippendalea theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT collierj theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT franzent theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT hotana theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT leachm theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT mcconnelld theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT pilawam theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT voronkovm theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT whitingm theperformanceandcalibrationofthecraftflyseyefastradioburstsurvey AT jamesc performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT bannisterk performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT macquartj performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT ekersr performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT oslowskis performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT shannonr performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT allisonj performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT chippendalea performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT collierj performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT franzent performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT hotana performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT leachm performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT mcconnelld performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT pilawam performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT voronkovm performanceandcalibrationofthecraftflyseyefastradioburstsurvey AT whitingm performanceandcalibrationofthecraftflyseyefastradioburstsurvey |