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1. chinaXiv:201605.01819 [pdf]

Wide-bandwidth drift-scan pulsar surveys of globular clusters: application to early science observations with FAST

Lei, Zhang; George, Hobbs ; Di, Li; Duncan, Lorimer; Jie, Zhang; Meng, Yu; You-Ling, Yue; Pei, Wang; Zhi-Chen Pan; Shi, Dai
Subjects: Astronomy >> Astrophysical processes

The Five-hundred-meter Aperture Spherical radio Telescope (FAST) will begin its early-science operations during 2016. Drift-scan pulsar surveys will be carried out during this period using an ultra-wide-band receiver system (covering ? 270 to 1620 MHz). We describe a method for accounting for the changes in the telescope beam shape and the pulsar parameters when searching for pulsars over such a wide bandwidth. We applied this method to simulated data sets of pulsars in globular clusters that are visible to FAST and found that a representative observation would have a sensitivity of ? 40 ?Jy. Our results showed that a single drift-scan (lasting less than a minute) is likely to find at least one pulsar for observations of four globular clusters. Repeated observations will increase the likely number of detections. We found that pulsars in ?16 clusters are likely to be found if the data from 100 drift-scan observations of each cluster are incoherently combined.

submitted time 2016-05-23 Hits7329Downloads1080 Comment 0

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