Globular Clusters GMRT Pulsar Search (GCGPS) II: Discovery of five MSPs in M69 and M70
Jyotirmoy Das (1), Jayanta Roy (1), Paulo C. C. Freire (2), Scott M Ransom (3), Bhaswati Bhattacharyya (1), Karel Ad\'amek (4), Wes Armour (5), Sanjay Kudale (1, 6), Mekhala V. Muley (6) ((1) National Center for Radio Astrophysics (NCRA), Pune, India

TL;DR
This study reports the discovery of five millisecond pulsars in two globular clusters using the upgraded GMRT, demonstrating the survey's effectiveness in uncovering new pulsars in previously underexplored GCs.
Contribution
First detection of MSPs in M69 and M70 using uGMRT, with precise localizations for some, advancing pulsar search techniques in globular clusters.
Findings
Discovered five new MSPs in M69 and M70
Achieved arcsecond localization for two MSPs in M69
Provided upper limits on pulsar emissions in non-detected clusters
Abstract
This paper reports recent discoveries from the Globular Clusters GMRT Pulsar Search (GCGPS) survey, which aims to uncover pulsars in the globular clusters (GCs) of the Milky Way using the upgraded Giant Metrewave Radio Telescope (uGMRT). Utilising the Band-4 (550750 MHz) and Band-3 (300500 MHz) receivers, the survey targets GCs accessible to uGMRT (), excluding the declination range that can be covered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The survey focuses on GCs that have not previously been searched with comparable sensitivity in these radio frequencies. In this paper, we present the discovery of the five MSPs in two GCs, NGC~6637 (M69) and NGC~6681 (M70), each hosting MSPs identified here for the first time. Observations of M69 led to the discovery of two MSPs: J18313220A (M69A) and J18313220B…
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Taxonomy
TopicsPulsars and Gravitational Waves Research · Radio Astronomy Observations and Technology · Astronomy and Astrophysical Research
