Detection of bursts from FRB 20220912A at 1.4 and 2.2 GHz

ATel #15791; Kaustubh Rajwade (ASTRON), Robert Wharton (NASA-JPL), Walid Majid (NASA-JPL), Mitch Mickaliger (JBCA-University of Manchester), Benjamin Stappers (JBCA-University of Manchester), Rene Breton (JBCA-University of Manchester), Andrew Lyne (JBCA-University of Manchester), Michael Keith (JBCA-University of Manchester), Charles Naudet (NASA-JPL), Aaron Pearlman (McGill University), Thomas Prince (Caltech), Charles Walker (MPIfR, Bonn), Patrick Weltevrede (JBCA-University of Manchester)
on 5 Dec 2022; 16:28 UT
Credential Certification: Kaustubh Rajwade (rkaustubh10@gmail.com)

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FRB 20220912A is a highly active repeating FRB that was discovered by the CHIME/FRB project on 2022-09-12 07:45:51 UTC (ATel# 15679). Subsequent observations by a variety of telescopes allowed for arc-second localization and identification of the host galaxy (ATel# 15720). We observed FRB 20220912A on 2022 November 12 from 13:21:00 to 15:21:00 UTC with the Lovell telescope at Jodrell Bank Observatory, UK at L (1.4 GHz) band and the 70-m Deep Space Network (DSN) telescope DSS-63 in Robledo, Spain at S (2.2 GHz) and X (8.25 GHz) bands simultaneously from 13:21:24 - 15:30:24 UTC. For the observations with the Lovell Telescope, the data were sampled at 62.5 nanoseconds over an effective bandwidth of 300 MHz. The coarsely channelized (22 subbands spanning 16 MHz each) voltages were then saved to disk for offline analysis. Simultaneously, data were filterbanked and downsampled to a time resolution of 256 microseconds. Known channels were flagged for interference before cleaning the data. The cleaned filterbank data were then searched for bright, single pulses. We recorded dual polarization baseband data simultaneously at 2200-2300 MHz (S-band) and 8207-8335 MHz (X-band) for the DSN observations. The S-band data were channelized into 1024 channels with a time resolution of 10.24 microseconds and X-band into 128 channels with a time resolution of one microsecond. S-band data were dedispersed at a DM value of 219.46 pc/cc and single pulse searches were performed with an SNR threshold of 7. We detected three bursts at L-band in these observations (B1L, B2L, and B3L) at topocentric arrival times of MJD 59895.5586924, 59895.5994775, and 59895.6239375, with fluences of 4.7 Jy-ms, 13.4 Jy-ms, and 2.3 Jy-ms respectively. Two bursts were detected at S-band with topocentric arrival times of MJD 59895.5584776 and 59895.635701 (B1S, B2S) and fluences of 1.5 Jy-ms and 2.1 Jy-ms. We also searched the X-band data around the DSN S-band bursts as well as around the L-band bursts reported at Lovell and detected no bursts above our threshold value 0f 0.5 Jy-ms. The L-band bursts are not coincident with the bursts seen at S-band, showing the band-limited nature of bursts from this FRB. We encourage continued monitoring of the source over a range of radio frequencies.