GBT25A-349

Deep Search and Follow-Up of Newly Discovered MSPs in Four Globular Clusters

Abstract

This proposal aims to conduct deep searches and follow-up observations of newly discovered millisecond pulsars (MSPs) in four globular clusters (GCs) using the Green Bank Telescope (GBT). The recent survey named Globular Clusters GMRT Pulsar Search (GCGPS) by the upgraded Giant Metrewave Radio Telescope (uGMRT) has resulted in the discovery of seven MSPs in NGC6093 (M80), NGC1904 (M79), NGC6637 (M69), and NGC6681 (M70). We propose 24 hours (6 hours on each GC) of GBT observations at 820 MHz to: 1) Study the polarimetric properties of these seven MSPs, along with their spectral index measurement. 2) Search for additional fainter or off-center pulsars that may have been missed by GCGPS due to sensitivity or sky coverage limitations.
For the polarization study, full stokes coherently dispersed data will be recorded, allowing us to study the spectral and polarization properties of the newly discovered MSPs, along with the measurement of their Rotataio Measure (RM) values. Stokes I data will be extracted from the full Stokes data. This will allow us to search for any additional faint/off-centered MSPs that we may have missed earlier, leading to optimal scientific results through the combined efforts of uGMRT and GBT.

Investigators

Name	Institution
Jyotirmoy Das *	Tata Institute of Fundamental Research
Scott Ransom	National Radio Astronomy Observatory; Virginia, University of
Jayanta Roy	Tata Institute of Fundamental Research

* indicates the PI