An Arecibo follow-up study of seven pulsars discovered by Five-hundred-meter Aperture Spherical radio Telescope (FAST)

Abstract

We present Arecibo 327 MHz confirmation and follow-up studies of seven new pulsars discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These pulsars are discovered in a pilot program of the Commensal Radio Astronomy FAST Survey (CRAFTS) with the ultra-wide-bandwidth commissioning receiver. Five of them are normal pulsars and two are extreme nulling slow pulsars. PSR J2111+2132’s dispersion measure(DM: 78.5 pc cm−3) is above the upper limits of the two Galactic free electron density models, NE2001 and YMW16, and PSR J2057+2133’s position is out of the Scutum-Crux Arm, making them uniquely useful for improving the Galactic free electron density model in their directions. We present a detailed single pulse analysis for the slow nulling pulsars. We show evidence that PSR J2323+1214’s main pulse component follows a non-Poisson distribution and marginal evidence for a sub-pulse-drift or recurrent period of 32.3±0.4 rotations from PSR J0539+0013. We discuss the implication of our finding to the pulsar radiation mechanism.

Arecibo and FAST Timing Follow-up of twelve Millisecond Pulsars Discovered in Commensal Radio Astronomy FAST Survey

“…Cruces et al 2021 presented confirmation and timing results of 10 CRAFTS pulsars, including 9 isolated pulsars and 1 neutron star -Carbon-Oxygen white dwarf (WD) binary system, with the 100-m Effelsberg radio-telescope. Wang et al 2021a showed con- firmation results and nulling studies of 7 CRAFTS pulsars with the Arecibo 305-m Telescope.…”

“…The ongoing surveys, such as the CRAFTS and the FAST Galactic Plane Pulsar Snapshot Survey (Han et al 2021, GPPS) are expected to discover many more MSPs, and thus make a significant contribution to the PTA experiments. Until December 2021, combining all pulsars discovered in the CRAFTS and the early FAST commission survey, more than 160 new pulsars 3 (include 35 MSPs) (Qian et al 2019;Zhang et al 2019;Cameron et al 2020;Wang et al 2021a;Cruces et al 2021;Wang et al 2021c), 4 FRBs (Zhu et al 2020;Niu et al 2021) and 1 radio-faint MSP from the Fermi-LAT unassociated source (Wang et al 2021b;You et al 2021) have been discovered in total ∼ 850 hours. The area searched represents 15% of the sky that FAST can see.…”

“…With the rapid growth of pulsar candidates, we strive to swiftly follow up FAST discoveries through international collaborations. Our team members from Parkes, Effelsberg, and Green Bank radio Telescopes are working on the CRAFTS pulsar followup (Cameron et al 2020;Cruces et al 2021;Wang et al 2021a). Cameron et al 2020 reported confirmation and timing results of 11 isolated pulsars found in CRAFTS with the 64-m Parkes Radio Telescope.…”

A GPU based single-pulse search pipeline (GSP) with database and its application to the commensal radio astronomy FAST survey (CRAFTS)

“…Using GSP pipeline, we discovered 13 new pulsars 6 as shown in Table 6, and used FFA (Staelin 1969) for periodical search. For the single pulses adjacent to the DM, the maximum range of the FFA search is 1.5 times the time interval of the two single pulses adjacent to the DM; the follow-up timing observation has been completed by Prakes and Effelsberg Radio Telescope, these pulsars have been reported upon (Cameron et al 2020;Qian et al 2019;Zhang et al 2019) and (Cruces 2021 MNRAS accepted, Wang Shen (Wang et al 2021))), the discovery plots of GSP for each of 13 pulsars are shown in Figure 6. -GSP implement the presto dedispersion package 'prepsubband' with CUDA, which was shown to be ∼120 times faster than the original 'prepsubband' and ∼60 times faster than the MPI version for processing CRAFTS data.…”

The Discovery of a Rotating Radio Transient J1918–0449 with Intriguing Emission Properties with the Five-hundred-meter Aperture Spherical Radio Telescope

“…RRAT J1918−0449 is the first RRAT discovered in the commensal radio astronomy FAST survey (CRAFTS; 12 Nan et al 2011;Li et al 2018;Qian et al 2019;Zhang et al 2019;Cameron et al 2020;Wang et al 2021aWang et al , 2021bCruces et al 2021) using a single-pulse search technique (Zhu et al 2014). In this paper, we present the discovery and analysis of the intriguing emission behavior of RRAT J1918−0449 observed with the FAST, which is organized as follows.…”