A search for highly dispersed fast radio bursts in three Parkes multibeam surveys

Crawford, F.; Rane, A.; Tran, Lam M.; Rolph, K.; Lorimer, D. R.; Ridley, Josephine

doi:10.1093/mnras/stw1233

Cited by 26 publications

(40 citation statements)

References 35 publications

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“…The FRBs generated in these simulations had spectral indices sampled from a normal distribution and scattering timescales sampled from a lognormal distribution. If intrinsic spectral index were the only reason for our nondetection, i.e., scattering and freefree absorption were absent, the nondetection with GBNCC would be compatible with the Parkes rate estimate reported by Crawford et al (2016) for 0.35 a > + . Karastergiou et al (2015) derived a constraint, α>+0.1, based on nondetection with LOFAR at 145 MHz.…”

Section: Discussionsupporting

confidence: 78%

“…The constraints on spectral index are very sensitive to the 1.4 GHz rate estimate used in the simulations. The above-mentioned constraint is derived using the Crawford et al (2016) rate estimate. If the rate estimate reported by Champion et al (2016) is used, then the constraint is weaker with α>−0.9.…”

Section: Discussionmentioning

confidence: 99%

“…b The parameters are valid for the HTRU survey, for which the rate was reported by Champion et al (2016). Crawford et al (2016) estimated the FRB rate using several Parkes surveys, the parameters for which have been reported in their paper. c The field of view quoted here for the 13-beam receiver of the Parkes telescope has been calculated based on the single-beam field of view of 0.043 deg 2 , reported by Burke-Spolaor & Bannister (2014).…”

Section: Rrattrap Sensitivitymentioning

confidence: 99%

“…The scattering timescale and field of view Figure 10. Predicted number of detections per hour for current and upcoming FRB surveys computed by Monte Carlo simulations using the Parkes rate reported by Crawford et al (2016) as reference. The shaded regions correspond to the bursts per hour for an arbitrary range of spectral indices (−2<α<+2), while the hatched regions correspond to the bursts per hour for the range 2 lim a a < < + , where lim a for each γ is the spectral index constraint derived in this paper.…”

Section: Predictions For Chimementioning

confidence: 99%

“…Although our rate prediction for 700-800 MHz is not very different from the Connor et al (2016) prediction, there are significant differences in the method of rate estimation. We extrapolate the 1.4 GHz rate estimate reported by Crawford et al (2016) to the frequency under consideration (750 MHz), assuming a distribution of spectral indices and scattering timescales for the FRB population. On the other hand, Connor et al (2016) predict the detection rate based on the measured FRB rate in the relevant frequency range (700-800 MHz) and neglect the distribution of scattering timescales.…”

Section: Predictions For Chimementioning

confidence: 99%

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A Search for Fast Radio Bursts with the GBNCC Pulsar Survey

Chawla

Kaspi

Josephy

et al. 2017

ApJ

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We report on a search for fast radio bursts (FRBs) with the Green Bank Northern Celestial Cap (GBNCC) Pulsar Survey at 350 MHz. Pointings amounting to a total on-sky time of 61 days were searched to a dispersion measure (DM) of 3000 pc cm −3 , while the rest (23 days; 29% of the total time) were searched to a DM of 500 pc cm −3 . No FRBs were detected in the pointings observed through 2016 May. We estimate a 95% confidence upper limit on the FRB rate of 3.6 10 3FRBs sky −1 day −1 above a peak flux density of 0.63 Jy at 350 MHz for an intrinsic pulse width of 5 ms. We place constraints on the spectral index α by running simulations for different astrophysical scenarios and cumulative flux density distributions. The nondetection with GBNCC is consistent with the 1.4 GHz rate reported for the Parkes surveys for α>+0.35 in the absence of scattering and free-free absorption and α>−0.3 in the presence of scattering, for a Euclidean flux distribution. The constraints imply that FRBs exhibit either a flat spectrum or a spectral turnover at frequencies above 400 MHz. These constraints also allow estimation of the number of bursts that can be detected with current and upcoming surveys. We predict that CHIME may detect anywhere from several to ∼50 FRBs per day (depending on model assumptions), making it well suited for interesting constraints on spectral index, the log N-log S slope, and pulse profile evolution across its bandwidth (400-800 MHz).

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Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Section: Rrattrap Sensitivitymentioning

confidence: 99%

Section: Predictions For Chimementioning

confidence: 99%

Section: Predictions For Chimementioning

confidence: 99%

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A Search for Fast Radio Bursts with the GBNCC Pulsar Survey

Chawla

Kaspi

Josephy

et al. 2017

ApJ

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Fast radio bursts

Petroff

Hessels

Lorimer

2019

Astron Astrophys Rev

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622

471

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The discovery of radio pulsars over a half century ago was a seminal moment in astronomy. It demonstrated the existence of neutron stars, gave a powerful observational tool to study them, and has allowed us to probe strong gravity, dense matter, and the interstellar medium. More recently, pulsar surveys have led to the serendipitous discovery of fast radio bursts (FRBs). While FRBs appear similar to the individual pulses from pulsars, their large dispersive delays suggest that they originate from far outside the Milky Way and hence are many ordersof-magnitude more luminous. While most FRBs appear to be one-off, perhaps cataclysmic events, two sources are now known to repeat and thus clearly have a longer-lived central engine. Beyond understanding how they are created, there is also the prospect of using FRBs -as with pulsars -to probe the extremes of the Universe as well as the otherwise invisible intervening medium. Such studies will be aided by the high implied all-sky event rate: there is a detectable FRB roughly once every minute occurring somewhere on the sky. The fact that less than a hundred FRB sources have been discovered in the last decade is largely due to the small fields-of-view of current radio telescopes. A new generation of wide-field instruments is now coming online, however, and these will be capable of detecting multiple FRBs per day. We are thus on the brink of further breakthroughs in the short-duration radio transient phase space, which will be critical for differentiating between the many proposed theories for the origin of FRBs. In this review, we give an observational and theoretical introduction at a level that is accessible to astronomers entering the field.

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The Green Bank North Celestial Cap Pulsar Survey: Status and Future

Lynch

2017

Proc. IAU

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The ongoing Green Bank North Celestial Cap pulsar survey is using the Green Bank Telescope to search for pulsars and transients over 85% of the celestial sphere. The survey has resulted in over 150 new pulsars, among which are high-precision millisecond pulsars, several binary pulsars, including at least one relativistic double neutron star system, nulling pulsars, and several nearby millisecond pulsars. We find no fast radio bursts in the survey to date. We present these results and discuss the future prospects for the survey.

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A search for highly dispersed fast radio bursts in three Parkes multibeam surveys

Cited by 26 publications

References 35 publications

A Search for Fast Radio Bursts with the GBNCC Pulsar Survey

A Search for Fast Radio Bursts with the GBNCC Pulsar Survey

Fast radio bursts

The Green Bank North Celestial Cap Pulsar Survey: Status and Future

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