CHIME-o-Grav: Wideband Timing of Four Millisecond Pulsars from the NANOGrav 15-yr dataset
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915882529193984 |
|---|---|
| author | Agazie, Gabriella Kaplan, David L. Susobhanan, Abhimanyu Stairs, Ingrid H. Good, Deborah C. Meyers, Bradley W. Fonseca, Emmanuel Pennucci, Timothy T. Anumarlapudi, Akash Archibald, Anne M. Arzoumanian, Zaven Baker, Paul T. Brook, Paul R. Cassity, Alyssa Cromartie, H. Thankful Crowter, Kathryn DeCesar, Megan E. Demorest, Paul B. Dolch, Timothy Dong, Fengqiu Adam Ferrara, Elizabeth C. Fiore, William Freedman, Gabriel E. Garver-Daniels, Nate Gentile, Peter A. Glaser, Joseph Hazboun, Jeffrey S. Jennings, Ross J. Jones, Megan L. Kerr, Matthew Lam, Michael T. Lorimer, Duncan R. Luo, Jing Lynch, Ryan S. McEwen, Alexander McKee, James W. McLaughlin, Maura A. McMann, Natasha Ng, Cherry Nice, David J. Perera, Benetge B. P. Pol, Nihan S. Radovan, Henri A. Ransom, Scott M. Ray, Paul S. Saffer, Alexander Schmiedekamp, Ann Schmiedekamp, Carl Shapiro-Albert, Brent J. Stovall, Kevin Swiggum, Joseph K. Thompson, Mercedes S. Wahl, Haley M. |
| author_facet | Agazie, Gabriella Kaplan, David L. Susobhanan, Abhimanyu Stairs, Ingrid H. Good, Deborah C. Meyers, Bradley W. Fonseca, Emmanuel Pennucci, Timothy T. Anumarlapudi, Akash Archibald, Anne M. Arzoumanian, Zaven Baker, Paul T. Brook, Paul R. Cassity, Alyssa Cromartie, H. Thankful Crowter, Kathryn DeCesar, Megan E. Demorest, Paul B. Dolch, Timothy Dong, Fengqiu Adam Ferrara, Elizabeth C. Fiore, William Freedman, Gabriel E. Garver-Daniels, Nate Gentile, Peter A. Glaser, Joseph Hazboun, Jeffrey S. Jennings, Ross J. Jones, Megan L. Kerr, Matthew Lam, Michael T. Lorimer, Duncan R. Luo, Jing Lynch, Ryan S. McEwen, Alexander McKee, James W. McLaughlin, Maura A. McMann, Natasha Ng, Cherry Nice, David J. Perera, Benetge B. P. Pol, Nihan S. Radovan, Henri A. Ransom, Scott M. Ray, Paul S. Saffer, Alexander Schmiedekamp, Ann Schmiedekamp, Carl Shapiro-Albert, Brent J. Stovall, Kevin Swiggum, Joseph K. Thompson, Mercedes S. Wahl, Haley M. |
| contents | Wideband timing of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) datasets, where a single time-of-arrival (TOA) and a single dispersion measure (DM) are measured using the entire bandwidth of each observation, was first done for the 12.5-year dataset, and proved to be invaluable for characterizing the time-varying dispersion measure, reducing the data volume, and for improving the overall timing precision. The Canadian Hydrogen Intensity Mapping Experiment (CHIME) Telescope has been observing most NANOGrav millisecond pulsars (MSPs) at nearly daily cadence (compared to roughly monthly cadence for other NANOGrav observations) since 2019 with the objective of integration into future pulsar timing array (PTA) datasets. In this paper, we show the results of integration of high-cadence, low-observing-frequency CHIME data with data from the NANOGrav experiment for an isolated MSP PSR J0645$+$5158 and three binary MSPs PSR J1012$+$5307, PSR J2145$-$0750, and PSR J2302$+$4442. Using a wideband timing pipeline which we also describe, we present updated timing results for all four sources, including improvements in measurements of relativistic post-Keplerian parameters for the three binary pulsars in this analysis. For PSR J2302$+$4442, we report an updated strong detection of Shapiro delay from which we measured a companion mass of $0.35^{+0.05}_{-0.04}\ M_{\odot}$, a pulsar mass of $1.8^{+0.3}_{-0.3}\ M_{\odot}$, and an orbital inclination of ${80^{\circ}}^{+1}_{-2}$. We also report updated constraints on the reflex motion for PSR J2145$-$0750 using a combination of Very Long Baseline Array astrometry and our updated measurement of the time derivative of the projected semi-major axis of the pulsar orbit as a prior. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_16668 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | CHIME-o-Grav: Wideband Timing of Four Millisecond Pulsars from the NANOGrav 15-yr dataset Agazie, Gabriella Kaplan, David L. Susobhanan, Abhimanyu Stairs, Ingrid H. Good, Deborah C. Meyers, Bradley W. Fonseca, Emmanuel Pennucci, Timothy T. Anumarlapudi, Akash Archibald, Anne M. Arzoumanian, Zaven Baker, Paul T. Brook, Paul R. Cassity, Alyssa Cromartie, H. Thankful Crowter, Kathryn DeCesar, Megan E. Demorest, Paul B. Dolch, Timothy Dong, Fengqiu Adam Ferrara, Elizabeth C. Fiore, William Freedman, Gabriel E. Garver-Daniels, Nate Gentile, Peter A. Glaser, Joseph Hazboun, Jeffrey S. Jennings, Ross J. Jones, Megan L. Kerr, Matthew Lam, Michael T. Lorimer, Duncan R. Luo, Jing Lynch, Ryan S. McEwen, Alexander McKee, James W. McLaughlin, Maura A. McMann, Natasha Ng, Cherry Nice, David J. Perera, Benetge B. P. Pol, Nihan S. Radovan, Henri A. Ransom, Scott M. Ray, Paul S. Saffer, Alexander Schmiedekamp, Ann Schmiedekamp, Carl Shapiro-Albert, Brent J. Stovall, Kevin Swiggum, Joseph K. Thompson, Mercedes S. Wahl, Haley M. High Energy Astrophysical Phenomena Wideband timing of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) datasets, where a single time-of-arrival (TOA) and a single dispersion measure (DM) are measured using the entire bandwidth of each observation, was first done for the 12.5-year dataset, and proved to be invaluable for characterizing the time-varying dispersion measure, reducing the data volume, and for improving the overall timing precision. The Canadian Hydrogen Intensity Mapping Experiment (CHIME) Telescope has been observing most NANOGrav millisecond pulsars (MSPs) at nearly daily cadence (compared to roughly monthly cadence for other NANOGrav observations) since 2019 with the objective of integration into future pulsar timing array (PTA) datasets. In this paper, we show the results of integration of high-cadence, low-observing-frequency CHIME data with data from the NANOGrav experiment for an isolated MSP PSR J0645$+$5158 and three binary MSPs PSR J1012$+$5307, PSR J2145$-$0750, and PSR J2302$+$4442. Using a wideband timing pipeline which we also describe, we present updated timing results for all four sources, including improvements in measurements of relativistic post-Keplerian parameters for the three binary pulsars in this analysis. For PSR J2302$+$4442, we report an updated strong detection of Shapiro delay from which we measured a companion mass of $0.35^{+0.05}_{-0.04}\ M_{\odot}$, a pulsar mass of $1.8^{+0.3}_{-0.3}\ M_{\odot}$, and an orbital inclination of ${80^{\circ}}^{+1}_{-2}$. We also report updated constraints on the reflex motion for PSR J2145$-$0750 using a combination of Very Long Baseline Array astrometry and our updated measurement of the time derivative of the projected semi-major axis of the pulsar orbit as a prior. |
| title | CHIME-o-Grav: Wideband Timing of Four Millisecond Pulsars from the NANOGrav 15-yr dataset |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2510.16668 |