The Indian Pulsar Timing Array: First data release
The Indian Pulsar Timing Array: First data release
复制标题
印度脉冲星计时阵列:首次数据发布
DOI:
10.1017/pasa.2022.46
复制
发表时间:
2022
影响因子:
6.3
通讯作者:
Tarafdar et. al
中科院分区:
文献类型:
--
作者:
Ryota Ikeda;Ken-ichi Tadaki;Daisuke Iono;Takuma Izumi;Yusei Koyama;Rhythm Shimakawa;Ichi Tanaka;Masao Hayashi;Tadayuki Kodama;Kotaro Kohno;Bunyo Hatsukade;Tomoko L. Suzuki;Yoichi Tamura;Tarafdar et. al
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.
登录
查看更多内容
影响因子:
64.8
作者:
G. Swarup;N. Sarma;M. Joshi;V. K. Kapahi;D. Bagri;S. Damle;S. Ananthakrishnan;V. Balasubramanian;S. S. Bhave;R. P. Sinha
通讯作者:
R. P. Sinha
DOI:
10.18022/acfco.2018.37.1.009
发表时间:
2018
期刊:
--
影响因子:
--
作者:
G. Lim
通讯作者:
G. Lim
DOI:
10.3917/rppg.067.0041
发表时间:
2016
期刊:
--
影响因子:
--
作者:
B. Chouvier
通讯作者:
B. Chouvier
影响因子:
4.8
作者:
佐野圭;福田 努;K Nobleson et .al
通讯作者:
K Nobleson et .al
影响因子:
6.5
作者:
Y. Maan;J. van Leeuwen;D. Vohl
通讯作者:
D. Vohl