Search for the optical counterpart of the 16ms X-ray pulsar in the LMC
Mignani, R. P. · Pulone, L. · Marconi, G. · Iannicola, G. · Caraveo, P. A.
Original · EN
The 16ms X-ray pulsar PSR J0537-6910 in SNR N157B is the fastest known isolated (non-recycled) pulsar and, with a rotational energy loss dE/dt 4.8 10³8 erg/s, is the most energetic (together with the Crab). Here we report the results of optical observations of the field, recently performed with the SUSI2 camera of the NTT. Few objects are observed inside the 3 arcsec X-ray error circle but none of them can be convincingly associated to the pulsar, which appears undetected down to V 23.4. With a corresponding optical luminosity Lopt < 1.3 10³3 erg/s, PSR J0537-6910 is, at best, comparable to the other very young pulsars Crab and PSR B0540-69.
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