Globular Clusters GMRT Pulsar Survey (GCGPS)
About the Survey
Globular clusters (GCs) are gravitationally bound clusters of stars situated in our galaxy. Due to
the very close proximity of other stars, it gets easier for an old pulsar to find a companion to spin up to
form a recycled MSP. The unique properties of GCs make them the formation hub of MSPs. The high
stellar densities in GCs lead to a high probability of close stellar interactions through which binaries
form and subsequently evolve. From the begnning of 2023 we have started a pilot survey for pulsars in the GCs
at southern sky (declination less than -20 deg) primarily with Band-4 (550-750 MHz) of the GMRT. The discoveries are listed below.
GC Search Team
Jyotirmoy Das (NCRA), Jayanta Roy (NCRA), Bhaswati Bhattacharyya (NCRA), Scott M. Ransom (National Radio Astronomy Observatory), Paulo Freire (Max Planck Institute for Radio Astronomy), Wes Armour (University of Oxford), Karel Adamek (Silesian University)
Publications
Discoveries
Table listing GMRT discoveries
| Cluster Name |
PSR |
Period (ms) |
DM (pc/cc) |
Binary |
Flux density(mJy) |
Discovery Date |
| NGC6093 |
J1617-2258A |
4.32 |
66.9 |
Yes |
0.2 |
2023-07-21 |
| NGC1904 |
J0524-2431A |
4.68 |
62.3 |
Yes |
0.19 |
2024-01-07 |
| NGC6681 |
J1843-3217A |
3.93 |
70.6 |
- |
0.1 |
2024-05-10 |
| NGC6681 |
J1843-3217B |
4.44 |
71.1 |
- |
0.22 |
2024-05-10 |
| NGC6681 |
J1843-3217C |
6.06 |
71.1 |
- |
0.05 |
2024-05-10 |
| NGC6637 |
J1831-3220A |
3.81 |
82.1 |
Yes |
0.17 |
2024-05-23 |
| NGC6637 |
J1831-3220B |
4.80 |
81.9 |
- |
0.12 |
2024-06-02 |