The importance of Very Long Baseline Interferometry (VLBI) for pulsar research is becoming increasingly prominent and receiving more and more attention. In this paper, we present pathfinding pulsar observation results with the Chinese VLBI Network (CVN) incorporating the Five-hundred-meter Aperture Spherical radio Telescope (FAST). On MJD 60045 (April 11th, 2023), PSRs B0919+06 and B1133+16 were observed with the phase-referencing mode in the L-band using four radio telescopes (FAST, TianMa, Haoping and Nanshan) and correlated with the pulsar binning mode of the distributed FX-style software correlator in Shanghai. After further data processing with the NRAO Astronomical Image Processing System (AIPS), we detected these two pulsars and fitted their current positions with accuracy at the milliarcsecond level. By comparison, our results show significantly better agreement with predicted values based on historical VLBI observations than that with previous timing observations, as pulsar astrometry with the VLBI provides a more direct and model-independent method for accurately obtaining related parameters.
@article{arxiv.2409.16059,
title = {Pathfinding pulsar observations with the CVN incorporating the FAST},
author = {Zhen Yan and Zhiqiang Shen and Peng Jiang and Bo Zhang and Haiyan Zhang and Lang Cui and Jintao Luo and Rurong Chen and Wu Jiang and Hua Zhang and De Wu and Rongbing Zhao and Jianping Yuan and Yue Hu and Yajun Wu and Bo Xia and Guanghui Li and Yongnan Rao and Chenyu Chen and Xiaowei Wang and Hao Ding and Yongpeng Liu and Fuchen Zhang and Yongbin Jiang},
journal= {arXiv preprint arXiv:2409.16059},
year = {2024}
}