Optical Investigation Of The Crab Pulsar: Simultaneous Ubvr Light Curves With Time Resolution Of 3.3

Abstract

The results of the Crab pulsar observations with the photometrical MANIA (Multichannel Analysis of Nanosecond Intensity Alterations) comlex at the 6-m telescope are presented. More than 12 millions photons in UBVRbands simultaneously with time resolution of 10 \Gamma7 s were detected. Using the original software for search for optical pulsar period, we obtained the light curves of the object with time resolution of about 3.3 ¯s. Their detailed analysis gives the spectral change during pulse and subpulse, the shape of the pulse peaks, which are plateaus (with the duration of about 50 ¯s for the main pulse), limits for an amplitude of fine temporal (stochastic and regular) structure of pulse and subpulse and the interpulse space intensity. The results of CCD-spectroscopy of the Crab pulsar show that its summarized spectrum is flat. There are no lines, neither emission nor absorbtion ones. Upper limit for line intensity or depth is 3.5% with the confidence probability of 95%. Key Words..