uGMRT Detection of Polarised Bursts from LPT J1634+44
ATel #17565; Chahat Dudeja (NCRA-TIFR), Suryarao Bethapudi (Bonn, Germany), Kshitij Bane (NCRA-TIFR), Abhinav Narayan (IIT-Indore), Sridhar Gajendran (NCRA-TIFR), Jayanta Roy (NCRA-TIFR), Sanjay Kudale (NCRA-TIFR), Narendranath Patra (IIT-Indore)
on 27 Dec 2025; 02:32 UT
Credential Certification: Jayanta Roy (jroy@ncra.tifr.res.in)
Subjects: Radio, Transient, Variables
In the original ATel #17562, we reported the detection of polarised bursts from the LPT J1634+44 using uGMRT Band-4 observations but did not include quantitative polarisation measurements. For the two bursts detected on MJD 61021 with full-polarisation observations, we detected strong circularly polarised components. Integrating the Stokes parameters over the full on-pulse window containing multiple burst components, the time-averaged absolute circular polarisation fractions for the 61021.163594768 burst is 80.55(9)% and for the 61021.182956071 burst is 88.1(1)%. The sign of Stokes V remains consistent across the burst profile. The time-averaged linear polarisation fraction is around 42% for both the bursts. The rotation measures (RM) of the two bursts are 8.1 +/- 0.2 rad/m^2 and 7.6 +/- 0.1 rad/ m^2 respectively.
