Decade-long Timing of Four GMRT Discovered Millisecond Pulsars

The discovery and timing follow up of millisecond pulsars (MSPs) are necessary not just for their usefulness in pulsar timing arrays (PTAs) but also for investigating their own intriguing properties. In this work, we provide the findings of the decade-long timing of four MSPs discovered by the Giant Meterwave Radio Telescope (GMRT), including their timing precision, model parameters, and newly detected proper motions. We compare the timing results for these MSPs before and after the GMRT upgrade in 2017 and characterize the improvement in timing precision due to the bandwidth upgrade. We discuss the suitability of these four GMRT MSPs as well as the usefulness of the decade-long timing data for PTA experiments. These data may aid in the global effort to improve the signal-to-noise ratios of recently detected signature of gravitational waves in cross-correlation statistics of residuals of MSPs.

[1]  B. Bhattacharyya,et al.  The GMRT High Resolution Southern Sky Survey for Pulsars and Transients. VI. Discovery of Nulling, Localization, and Timing of PSR J1244–4708 , 2023, The Astrophysical Journal.

[2]  X. Wu,et al.  Searching for the Nano-Hertz Stochastic Gravitational Wave Background with the Chinese Pulsar Timing Array Data Release I , 2023, Research in Astronomy and Astrophysics.

[3]  Y. Levin,et al.  Search for an Isotropic Gravitational-wave Background with the Parkes Pulsar Timing Array , 2023, The Astrophysical Journal Letters.

[4]  Joseph P. Glaser,et al.  The NANOGrav 15 yr Data Set: Evidence for a Gravitational-wave Background , 2023, The Astrophysical Journal Letters.

[5]  S. Sunder,et al.  The GMRT High Resolution Southern Sky Survey for Pulsars and Transients. V. Localization of Two Millisecond Pulsars , 2023, The Astrophysical Journal.

[6]  M. Mclaughlin,et al.  The GMRT High Resolution Southern Sky Survey for Pulsars and Transients. IV. Discovery of Four New Pulsars with an FFA Search , 2022, The Astrophysical Journal.

[7]  P. Freire,et al.  Serendipitous Discovery of Three Millisecond Pulsars with the GMRT in Fermi-directed Survey and Follow-up Radio Timing , 2022, The Astrophysical Journal.

[8]  Neelam Dhanda Batra,et al.  The Indian Pulsar Timing Array: First data release , 2022, Publications of the Astronomical Society of Australia.

[9]  M. Mclaughlin,et al.  The GMRT High Resolution Southern Sky Survey for Pulsars and Transients. III. Searching for Long-period Pulsars , 2022, The Astrophysical Journal.

[10]  B. Stappers,et al.  Wide-band Timing of GMRT-discovered Millisecond Pulsars , 2022, The Astrophysical Journal.

[11]  S. Ransom,et al.  Discovery and Timing of Three Millisecond Pulsars in Radio and Gamma-Rays with the Giant Metrewave Radio Telescope and Fermi Large Area Telescope , 2021, The Astrophysical Journal.

[12]  G. Desvignes,et al.  The International Pulsar Timing Array: second data release , 2019, Monthly Notices of the Royal Astronomical Society.

[13]  M. Mclaughlin,et al.  The GMRT High-resolution Southern Sky Survey for Pulsars and Transients. II. New Discoveries, Timing, and Polarization Properties , 2019, The Astrophysical Journal.

[14]  T. Pennucci.  Frequency-dependent Template Profiles for High-precision Pulsar Timing , 2018, The Astrophysical Journal.

[15]  T. Joseph W. Lazio,et al.  The astrophysics of nanohertz gravitational waves , 2018, The Astronomy and Astrophysics Review.

[16]  B. C. Joshi,et al.  Precision pulsar timing with the ORT and the GMRT and its applications in pulsar astrophysics , 2018 .

[17]  B. C. Joshi,et al.  The Upgraded GMRT:Opening New Windows on the Radio Universe , 2017 .

[18]  R. N. Manchester,et al.  A NEW ELECTRON-DENSITY MODEL FOR ESTIMATION OF PULSAR AND FRB DISTANCES , 2016, 1610.09448.

[19]  D. Stinebring,et al.  The International Pulsar Timing Array: First Data Release , 2016, 1602.03640.

[20]  X. Siemens,et al.  The stochastic background: scaling laws and time to detection for pulsar timing arrays , 2013, 1305.3196.

[21]  G. Bruce Berriman,et al.  Astrophysics Source Code Library , 2012, ArXiv.

[22]  G. Hobbs,et al.  Tempo2: Pulsar Timing Package , 2012 .

[23]  Scott M. Ransom,et al.  PRESTO: PulsaR Exploration and Search TOolkit , 2011 .

[24]  Jitendra Kodilkar,et al.  A real-time software backend for the GMRT , 2009, 0910.1517.

[25]  D. Lorimer,et al.  A statistical study of 233 pulsar proper motions , 2005, astro-ph/0504584.

[26]  F. Jenet,et al.  Detecting the Stochastic Gravitational Wave Background Using Pulsar Timing , 2005, astro-ph/0504458.

[27]  R. Manchester,et al.  The Australia Telescope National Facility Pulsar Catalogue , 2003, astro-ph/0309219.

[28]  S. Anderson,et al.  Millisecond pulsar velocities , 1998, astro-ph/9811398.

[29]  J. Cordes,et al.  Interstellar propagation effects and the precision of pulsar timing , 1990 .

[30]  R. Hellings,et al.  Upper limits on the isotropic gravitational radiation background from pulsar timing analysis , 1983 .

[31]  S. Detweiler.  Pulsar timing measurements and the search for gravitational waves , 1979 .

[32]  Sabine Fenstermacher.  Handbook Of Pulsar Astronomy , 2016 .