GBT22B-213

GBT Follow-up of a Novel Repeating Galactic Transient Detected with CHIME/FRB

Abstract

In this proposal we request follow up of an unusually long pulse width Galactic repeating transient first detected by CHIME/FRB/Pulsar. While we do not know the origin of J0630+25, the complex morphology of its bursts are very similar to repeating FRBs and two recently discovered long-period magnetars (MeerKAT and MWA respectively). The source has emitted 7 bursts detected by CHIME/Pulsar with peak flux ranging from 0.17Jy to 0.37Jy and burst widths up to 1320ms. We propose to detect fainter bursts to establish a period, measure polarisation to probe the local environment and also quantify the spectral properties of J0630+25. Previous magnetars such as SGR1935+2154 have been shown to have a ~2 fold brightness increase at 1.4GHz when compared CHIME/FRB's 600MHz band. Thus we would like to quantify the spectral index of J0630+25 over similar frequency ranges by utilising the combined observations of CHIME/Pulsar, PF1 at 800MHz and L-band at GBT. In total, we request 32 hours of observation time, split evenly between the PF1 receiver at 820MHz and L-band. We propose the use of the VEGAS pulsar backend in coherent dedispersion mode. We would like 4 observations of 4 hours each on both receivers.

Investigators

Name	Institution
Ziggy Pleunis	Netherlands Institute for Radio Astronomy; Amsterdam, Universiteit van
Adam Dong *	Green Bank Observatory; British Columbia, University of
Ingrid Stairs	British Columbia, University of
Emmanuel Fonseca	British Columbia, University of; McGill University; West Virginia University
Shami Chatterjee	Cornell University
Shriharsh Tendulkar	Tata Institute of Fundamental Research; Tata Institute of Fundamental Research
Bradley Meyers	Curtin University
Andrew Seymour	Green Bank Observatory; National Astronomy and Ionosphere Center ; West Virginia University
Aaron Pearlman	McGill University; California Institute of Technology
Chia Min Tan	Manchester, University of; McGill University
Ryan Mckinven	McGill University; Toronto, University of
Mohit Bhardwaj	Carnegie Mellon University

* indicates the PI