Skip to main content Accessibility help
×
Home
Hostname: page-component-7ccbd9845f-jxkh9 Total loading time: 0.535 Render date: 2023-01-28T20:04:30.714Z Has data issue: true Feature Flags: { "useRatesEcommerce": false } hasContentIssue true

The Indian Pulsar Timing Array: First data release

Published online by Cambridge University Press:  24 October 2022

Pratik Tarafdar*
Affiliation:
The Institute of Mathematical Sciences, CIT Campus, Taramani, Chennai, Tamil Nadu 600113, India
K Nobleson
Affiliation:
Department of Physics, BITS Pilani Hyderabad Campus, Hyderabad, Telangana 500078, India
Prerna Rana
Affiliation:
Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Homi Bhabha Road, Navy Nagar, Colaba, Mumbai 400005, India
Jaikhomba Singha
Affiliation:
Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
M. A. Krishnakumar
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501 Bielefeld, Germany
Bhal Chandra Joshi
Affiliation:
National Centre for Radio Astrophysics, Pune University Campus, Pune 411007, India
Avinash Kumar Paladi
Affiliation:
Department of Earth & Space Sciences, IIST Thiruvananthapuram, Thiruvananthapuram, Kerala 695547, India
Neel Kolhe
Affiliation:
Department of Physics, St. Xavier’s College (Autonomous), Mumbai, Maharashtra 400001, India
Neelam Dhanda Batra
Affiliation:
Department of Physics & Astrophysics, University of Delhi, Delhi 110007, India
Nikita Agarwal
Affiliation:
Department of Electronics and Communication Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
Adarsh Bathula
Affiliation:
Department of Physics, Indian Institute of Science Education and Research, Mohali, Punjab 140306, India
Subhajit Dandapat
Affiliation:
Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Homi Bhabha Road, Navy Nagar, Colaba, Mumbai 400005, India
Shantanu Desai
Affiliation:
Department of Physics, IIT Hyderabad, Kandi, Telangana 502284, India
Lankeswar Dey
Affiliation:
Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Homi Bhabha Road, Navy Nagar, Colaba, Mumbai 400005, India National Centre for Radio Astrophysics, Pune University Campus, Pune 411007, India
Shinnosuke Hisano
Affiliation:
Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan
Prathamesh Ingale
Affiliation:
Fergusson College (Autonomous), Pune, Maharashtra 411004, India
Ryo Kato
Affiliation:
Osaka Central Advanced Mathematical Institute, Osaka Metropolitan University, Osaka 5588585, Japan Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
Divyansh Kharbanda
Affiliation:
Department of Physics, IIT Hyderabad, Kandi, Telangana 502284, India
Tomonosuke Kikunaga
Affiliation:
Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan
Piyush Marmat
Affiliation:
Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
B. Arul Pandian
Affiliation:
Raman Research Institute, Bengaluru, Karnataka, India
T. Prabu
Affiliation:
Raman Research Institute, Bengaluru, Karnataka, India
Aman Srivastava
Affiliation:
Department of Physics, IIT Hyderabad, Kandi, Telangana 502284, India
Mayuresh Surnis
Affiliation:
Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK
Sai Chaitanya Susarla
Affiliation:
School of Mathematics, National University of Ireland Galway, University Road, Galway H91TK33, Ireland
Abhimanyu Susobhanan
Affiliation:
National Centre for Radio Astrophysics, Pune University Campus, Pune 411007, India Center for Gravitation, Cosmology, and Astrophysics, University of Wisconsin-Milwaukee, Wisconsin 53211, USA
Keitaro Takahashi
Affiliation:
Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan International Research Organization for Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
P. Arumugam
Affiliation:
Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Manjari Bagchi
Affiliation:
The Institute of Mathematical Sciences, CIT Campus, Taramani, Chennai, Tamil Nadu 600113, India Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
Sarmistha Banik
Affiliation:
Department of Physics, BITS Pilani Hyderabad Campus, Hyderabad, Telangana 500078, India
Kishalay De
Affiliation:
MIT Kavli Institute for Astrophysics and Space Research, 77 Massachusetts Ave, Cambridge, MA 02139, USA
Raghav Girgaonkar
Affiliation:
Amity Centre of Excellence in Astrobiology, Amity University Mumbai, Mumbai, Maharashtra 410206, India
A. Gopakumar
Affiliation:
Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Homi Bhabha Road, Navy Nagar, Colaba, Mumbai 400005, India
Yashwant Gupta
Affiliation:
National Centre for Radio Astrophysics, Pune University Campus, Pune 411007, India
Yogesh Maan
Affiliation:
National Centre for Radio Astrophysics, Pune University Campus, Pune 411007, India
P. K. Manoharan
Affiliation:
Arecibo Observatory, University of Central Florida, Arecibo 00612, USA
Arun Naidu
Affiliation:
University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX13RH, UK
Dhruv Pathak
Affiliation:
The Inter-University Centre for Astronomy and Astrophysics, Pune 411007, India
*
Corresponding author: Pratik Tarafdar, email pratikta16@gmail.com

Abstract

We present the pulse arrival times and high-precision dispersion measure estimates for 14 millisecond pulsars observed simultaneously in the 300 $-$ 500 MHz and 1260 $-$ 1460 MHz frequency bands using the upgraded Giant Metrewave Radio Telescope. The data spans over a baseline of 3.5 years (2018-2021), and is the first official data release made available by the Indian Pulsar Timing Array collaboration. This data release presents a unique opportunity for investigating the interstellar medium effects at low radio frequencies and their impact on the timing precision of pulsar timing array experiments. In addition to the dispersion measure time series and pulse arrival times obtained using both narrowband and wideband timing techniques, we also present the dispersion measure structure function analysis for selected pulsars. Our ongoing investigations regarding the frequency dependence of dispersion measures have been discussed. Based on the preliminary analysis for five millisecond pulsars, we do not find any conclusive evidence of chromaticity in dispersion measures. Data from regular simultaneous two-frequency observations are presented for the first time in this work. This distinctive feature leads us to the highest precision dispersion measure estimates obtained so far for a subset of our sample. Simultaneous multi-band upgraded Giant Metrewave Radio Telescope observations in 300 $-$ 500 MHz and 1260 $-$ 1460 MHz are crucial for high-precision dispersion measure estimation and for the prospect of expanding the overall frequency coverage upon the combination of data from the various Pulsar Timing Array consortia in the near future. Parts of the data presented in this work are expected to be incorporated into the upcoming third data release of the International Pulsar Timing Array.

Type
Research Article
Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of the Astronomical Society of Australia

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Alam, M. F., et al. 2020a, ApJS, 252, 4 Google Scholar
Alam, M. F., et al. 2020b, ApJS, 252, 5 Google Scholar
Arzoumanian, Z., et al. 2015, ApJ, 813, 65 CrossRefGoogle Scholar
Arzoumanian, Z., et al. 2018, ApJS, 235, 37 CrossRefGoogle Scholar
Arzoumanian, Z., et al. 2021, PhRvL, 127, 251302 Google Scholar
Bailes, M., et al. 2016, in Proceedings of Science (Trieste, Italy: Sissa Medialab), 011Google Scholar
Chalumeau, A., et al. 2022, MNRAS, 509, 5538Google Scholar
Chen, S., et al. 2021, MNRAS, 508, 4970Google Scholar
Cordes, J. M., Shannon, R. M., & Stinebring, D. R. 2016, ApJ, 817, 16Google Scholar
Damour, T., & Deruelle, N. 1986, AnIHP, 44, 263 CrossRefGoogle Scholar
De, K., & Gupta, Y. 2016, ExA, 41, 67 CrossRefGoogle Scholar
Demorest, P. B., et al. 2013, ApJ, 762, 94 CrossRefGoogle Scholar
Desvignes, G., et al. 2016, MNRAS, 458, 3341 Google Scholar
Donner, J. Y., et al. 2019, A&A, 624, 22Google Scholar
Edwards, R. T., Hobbs, G. B., & Manchester, R. N. 2006, MNRAS, 372, 1549 CrossRefGoogle Scholar
Fonseca, E., et al. 2021, ApJ, 915, L12Google Scholar
Foster, R. S., & Backer, D. C. 1990, ApJ, 361, 300 CrossRefGoogle Scholar
Goncharov, B., et al. 2021a, MNRAS, 502, 478Google Scholar
Goncharov, B., et al. 2021b, ApJL, 917, L19 Google Scholar
Gupta, Y., et al. 2017, CSci, 113, 707 Google Scholar
Hobbs, G. 2013, CQG, 30, 224007 Google Scholar
Hobbs, G., et al. 2010, CQG, 27, 084013 Google Scholar
Hobbs, G., et al. 2019, MNRAS, 491, 5951 Google Scholar
Hobbs, G., et al. 2020, PASA, 37, e012 Google Scholar
Hobbs, G. B., Edwards, R. T., & Manchester, R. N. 2006, MNRAS, 369, 655 CrossRefGoogle Scholar
Hotan, A. W., Van Straten, W., & Manchester, R. N. 2004, PASA, 21, 302 Google Scholar
Huber, P. J. 1964, AnMS, 35, 73 CrossRefGoogle Scholar
Hunter, J. D. 2007, CSE, 9, 90 CrossRefGoogle Scholar
Joshi, B. C., et al. 2022, JApA, 10, arXiv:2207.06461Google Scholar
Joshi, B. C., et al. 2018, JApA, 39, 51 Google Scholar
Kaspi, V. M., Taylor, J. H., & Ryba, M. F. 1994, ApJ, 428, 713CrossRefGoogle Scholar
Kaur, D., et al. 2022, ApJ, 930, L27 Google Scholar
Keith, M. J., et al. 2012, MNRAS, 429, 2161 Google Scholar
Kerr, M., et al. 2020, PASA, 37, e020 Google Scholar
Klioner, S. A. 2005, arXiv e-prints, 0508292Google Scholar
Kopeikin, S. M. 1995, ApJ, 439, L5 CrossRefGoogle Scholar
Kopeikin, S. M. 1996, ApJ, 467, L93 Google Scholar
Kramer, M., & Champion, D. J. 2013, CQG, 30, 224009 CrossRefGoogle Scholar
Krishnakumar, M. A., et al. 2021, A&A, 651, A5 Google Scholar
Lam, M. T. 2021, RNAAS, 5, 167Google Scholar
Lee, K. J. 2016, in Astronomical Society of the Pacific Conference Series, Vol. 502, Frontiers in Radio Astronomy and FAST Early Sciences Symposium 2015, ed. L. Qain, & D. Li (Astronomical Society of the Pacific), 19Google Scholar
Lentati, L., Alexander, P., & Hobson, M. P. 2013, arXiv e-prints, arXiv:1312.2403 Google Scholar
Lentati, L., et al. 2016, MNRAS, 458, 2161Google Scholar
Liu, K., et al. 2014, MNRAS, 443, 3752Google Scholar
Lorimer, D., & Kramer, M. 2004, Handbook of Pulsar Astronomy (Cambridge University Press)Google Scholar
Maan, Y., van Leeuwen, J., & Vohl, D. 2021, A&A, 650, A80 Google Scholar
Manchester, R. N., et al. 2013, PASA, 30, e017 Google Scholar
McLaughlin, M. A. 2013, CQG, 30, 224008 CrossRefGoogle Scholar
Newville, M., Stensitzki, T., Allen, D. B., & Ingargiola, A. 2014, LMFIT: Non-Linear Least-Square Minimization and Curve-Fitting for Python, doi: 10.5281/zenodo.11813 CrossRefGoogle Scholar
Nice, D., et al. 2015, Tempo: Pulsar timing data analysisGoogle Scholar
Nobleson, K., et al. 2022, MNRAS, 512, 1234 CrossRefGoogle Scholar
Park, R. S., Folkner, W. M., Williams, J. G., & Boggs, D. H. 2021, AJ, 161, 105CrossRefGoogle Scholar
Pennucci, T. 2015, PhD thesis, University of Virginia, Charlottesville, VA, doi: 10.18130/V3W56C CrossRefGoogle Scholar
Pennucci, T. T. 2019, ApJ, 871, 34 Google Scholar
Pennucci, T. T., Demorest, P. B., & Ransom, S. M. 2014, ApJ, 790, 93 Google Scholar
Perera, B. B., et al. 2019, MNRAS, 490, 4666 Google Scholar
Price-Whelan, A. M., et al. 2018, AJ, 156, 123CrossRefGoogle Scholar
Ramachandran, R., Demorest, P., Backer, D. C., Cognard, I., & Lommen, A. 2006, ApJ, 645, 303 CrossRefGoogle Scholar
Reddy, S. H., et al. 2021, Timestamp flow in GWB and correction, Tech. rep., National Centre for Radio Astrophysics, PuneGoogle Scholar
Reddy, S. H., et al. 2017, JAI, 6, 1641011 Google Scholar
Rickett, B. J. 1990, ARA&A, 28, 561CrossRefGoogle Scholar
Sharma, S. S., et al. 2022, arXiv e-prints, arXiv:2201.04386 Google Scholar
Singha, J., et al. 2021, MNRAS, 507, L57 Google Scholar
Susobhanan, A., et al. 2021, PASA, 38, e017 Google Scholar
Swarup, G., et al. 1991, CSci, 60, 95 CrossRefGoogle Scholar
Swarup, G., et al. 1971, NatPhSci, 230, 185 CrossRefGoogle Scholar
Taylor, J. H. 1992, PTRSL, 341, 117 CrossRefGoogle Scholar
Van Straten, W., & Bailes, M. 2011, PASA, 28, 1 CrossRefGoogle Scholar
Verbiest, J. P., et al. 2016, MNRAS, 458, 1267 Google Scholar
You, X. P., et al. 2007, MNRAS, 378, 493 Google Scholar

Save article to Kindle

To save this article to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

The Indian Pulsar Timing Array: First data release
Available formats
×

Save article to Dropbox

To save this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Dropbox account. Find out more about saving content to Dropbox.

The Indian Pulsar Timing Array: First data release
Available formats
×

Save article to Google Drive

To save this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about saving content to Google Drive.

The Indian Pulsar Timing Array: First data release
Available formats
×
×

Reply to: Submit a response

Please enter your response.

Your details

Please enter a valid email address.

Conflicting interests

Do you have any conflicting interests? *