Multiband Detection of Repeating FRB 20180916B
- Creators
- Sand, Ketan R.
- Faber, Jakob T.
- Gajjar, Vishal
- Michilli, Daniele
- Andersen, Bridget C.
- Joshi, Bhal Chandra
- Kudale, Sanjay
- Pilia, Maura
- Brzycki, Bryan
- Cassanelli, Tomas
- Croft, Steve
- Dey, Biprateep
- John, Hoang
- Leung, Calvin
- Mckinven, Ryan
- Ng, Cherry
- Pearlman, Aaron B.
- Petroff, Emily
- Price, Danny C.
- Siemion, Andrew
- Smith, Kendrick
- Tendulkar, Shriharsh P.
Abstract
We present a multiband study of FRB 20180916B, a repeating source with a 16.3 day periodicity. We report the detection of four, one, and seven bursts from observations spanning 3 days using the upgraded Giant Metrewave Radio Telescope (300–500 MHz), the Canadian Hydrogen Intensity Mapping Experiment (400–800 MHz) and the Green Bank Telescope (600–1000 MHz), respectively. We report the first ever detection of the source in the 800–1000 MHz range along with one of the widest instantaneous bandwidth detections (200 MHz) at lower frequencies. We identify 30 μs wide structures in one of the bursts at 800 MHz, making it the lowest frequency detection of such structures for this fast radio burst thus far. There is also a clear indication of high activity of the source at a higher frequency during earlier phases of the activity cycle. We identify a gradual decrease in the rotation measure over two years and no significant variations in the dispersion measure. We derive useful conclusions about progenitor scenarios, energy distribution, emission mechanisms, and variation of the downward drift rate of emission with frequency. Our results reinforce that multiband observations are an effective approach to study repeaters, and even one-off events, to better understand their varying activity and spectral anomalies.
Additional Information
© 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 2021 November 2; revised 2022 April 22; accepted 2022 April 30; published 2022 June 20. We thank the anonymous referee for their comments that have allowed us to improve our manuscript. We thank Avinash Deshpande, Wael Farah, Akshay Suresh, and Gaurav Waratkar for their helpful insights. We thank the staff of the GMRT that made the uGMRT observations possible. The GMRT is run by the National Centre for Radio Astrophysics of the Tata Institute of Fundamental Research. We acknowledge that CHIME is located on the traditional, ancestral, and unceded territory of the Syilx/Okanagan people. We thank the Dominion Radio Astrophysical Observatory, operated by the National Research Council Canada, for gracious hospitality and expertise. CHIME is funded by a grant from the Canada Foundation for Innovation (CFI) 2012 Leading Edge Fund (Project 31170) and by contributions from the provinces of British Columbia, Québec, and Ontario. The CHIME/FRB Project is funded by a grant from the CFI 2015 Innovation Fund (Project 33213) and by contributions from the provinces of British Columbia and Québec, and by the Dunlap Institute for Astronomy and Astrophysics at the University of Toronto. Additional support was provided by the Canadian Institute for Advanced Research (CIFAR), McGill University and the McGill Space Institute via the Trottier Family Foundation, and the University of British Columbia. Breakthrough Listen is managed by the Breakthrough Initiatives, sponsored by the Breakthrough Prize Foundation (breakthroughinitiatives.org). The Green Bank Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. J.T.F. was generously supported by the National Science Foundation under the Berkeley SETI Research Center REU Site grant No. 1950897. A.B.P. is a McGill Space Institute (MSI) Fellow and a Fonds de Recherche du Quebec—Nature et Technologies (FRQNT) postdoctoral fellow. E.P. acknowledges funding from an NWO Veni Fellowship. Facilities: GMRT - Giant Meter-wave Radio Telescope, GBT - , CHIME. - Software: astropy (Astropy Collaboration et al. 2013), DM phase (Seymour et al. 2019), DSPSR (van Straten & Bailes 2011), Gptool (Susobhanan et al. 2020), Heimdall (Barsdell et al. 2012), ionFR (Sotomayor-Beltran et al. 2013), Matplotlib (Hunter 2007), Numpy (Harris et al. 2020), PRESTO (Ransom 2011), PSRCHIVE (Hotan et al. 2004; van Straten et al. 2011), Scipy (Virtanen et al. 2020), SIGPROC (Lorimer 2011), SPANDAK (Gajjar et al. 2018).Attached Files
Published - Sand_2022_ApJ_932_98.pdf
Accepted Version - 2111.02382.pdf
Submitted - 2111.02382v1.pdf
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Additional details
- Eprint ID
- 115824
- Resolver ID
- CaltechAUTHORS:20220725-156524000
- 31170
- Canada Foundation for Innovation
- 33213
- Canada Foundation for Innovation
- Province of British Columbia
- Province of Québec
- Province of Ontario
- Dunlap Institute for Astronomy and Astrophysics
- Canadian Institute for Advanced Research (CIFAR)
- McGill University
- McGill Space Institute
- Trottier Family Foundation
- University of British Columbia
- Breakthrough Prize Foundation
- AST-1950897
- NSF
- Fonds de recherche du Québec - Nature et technologies (FRQNT)
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
- Created
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2022-07-27Created from EPrint's datestamp field
- Updated
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2022-07-27Created from EPrint's last_modified field