The Hunt for the Optical Counterpart of the Fastest Pulsar.

Details The Hunt for the Optical Counterpart of the Fastest Pulsar. The Hunt for the Optical Counterpart of the Fastest Pulsar.

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9471m&link_type=abstract

HST Proposal ID #9471

Computer Science

Hst Proposal Id #9471

Scientific paper

PSR J0537-6910 is a fast, young { 5, 000 yrs} X-ray pulsar -still undetected in radio- at the center of the SNR N157B in the LMC. PSR J0537-6910 is a champion pulsar - with a period of 16 ms it is the fastest rotator among ``ordinary'' pulsars, with the sharpest X-ray pulse among young pulsars. It is the most energetic one {together with the Crab}, with a rotational energy loss dot E 5 10^38 erg s^-1, and its space velocity {>1, 000 km/s}, inferred from the shape of its X-ray bow-shock nebula, is probably the highest in the pulsar family. Soon after its discovery, we performed multicolor observations with the ESO NTT to search for the optical counterpart. However, none of the several potential candidates detected within, or close to, the original ROSAT/HRI error circle { eq 3 "} could be associated with the pulsar, which remained undetected down to V 23.4. The results could not be improved by using the more accurate Chandra position { eq 1 "}. Since the crowding of the area, with a relatively bright star close to the pulsar position, makes the search for the PSR J0537-6910 optical counterpart virtually hopeless from the ground, we propose to obtain deep high-resolution multicolor imaging with ACS/WFC. The same data will allow us to study, for the first time, in the optical the compact nebula detected around the pulsar by Chandra. Since the target is in a CVZ, the whole program can be completed in two orbits.

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