The Indian Pulsar Timing Array: First data release. (24th October 2022)
- Record Type:
- Journal Article
- Title:
- The Indian Pulsar Timing Array: First data release. (24th October 2022)
- Main Title:
- The Indian Pulsar Timing Array: First data release
- Authors:
- Tarafdar, Pratik
Nobleson, K
Rana, Prerna
Singha, Jaikhomba
Krishnakumar, M. A.
Joshi, Bhal Chandra
Paladi, Avinash Kumar
Kolhe, Neel
Batra, Neelam Dhanda
Agarwal, Nikita
Bathula, Adarsh
Dandapat, Subhajit
Desai, Shantanu
Dey, Lankeswar
Hisano, Shinnosuke
Ingale, Prathamesh
Kato, Ryo
Kharbanda, Divyansh
Kikunaga, Tomonosuke
Marmat, Piyush
Pandian, B. Arul
Prabu, T.
Srivastava, Aman
Surnis, Mayuresh
Susarla, Sai Chaitanya
Susobhanan, Abhimanyu
Takahashi, Keitaro
Arumugam, P.
Bagchi, Manjari
Banik, Sarmistha
De, Kishalay
Girgaonkar, Raghav
Gopakumar, A.
Gupta, Yashwant
Maan, Yogesh
Manoharan, P. K.
Naidu, Arun
Pathak, Dhruv
… (more) - Abstract:
- 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 measureAbstract: 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. … (more)
- Is Part Of:
- Publications of the Astronomical Society of Australia. Volume 39(2022)
- Journal:
- Publications of the Astronomical Society of Australia
- Issue:
- Volume 39(2022)
- Issue Display:
- Volume 39, Issue 2022 (2022)
- Year:
- 2022
- Volume:
- 39
- Issue:
- 2022
- Issue Sort Value:
- 2022-0039-2022-0000
- Page Start:
- Page End:
- Publication Date:
- 2022-10-24
- Subjects:
- radio telescopes -- radio astronomy -- astronomy data analysis -- pulsar timing method -- millisecond pulsars
Astronomy -- Periodicals
Southern sky (Astronomy) -- Periodicals
Astrophysics -- Periodicals
Periodicals
520.5 - Journal URLs:
- http://journals.cambridge.org/action/displayJournal?jid=pas ↗
http://www.publish.csiro.au/?nid=138 ↗ - DOI:
- 10.1017/pasa.2022.46 ↗
- Languages:
- English
- ISSNs:
- 1323-3580
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library HMNTS - ELD Digital store
- Ingest File:
- 24314.xml