Timing of optical pulsars with two high time resolution photometers at Asiago and NTT2011 XXXth URSI General Assembly and Scientific Symposium

Abstract

We\ua0have\ua0built\ua0two\ua0single\ua0photon\ua0very\ua0high\ua0speed\ua0photometers\ua0(Aqueye\ua0for\ua0the\ua0Asiago\ua01.8m\ua0telescope\ua0and\ua0Iqueye\ua0for\ua0the\ua03.5m\ua0ESO\ua0NTT)\ua0as\ua0prototypes\ua0of\ua0a\ua0\u2018quantum\u2019\ua0photometer\ua0for\ua0the\ua0European\ua0Extremely\ua0Large\ua0Telescope\ua0(E\u2010ELT) \ua0 The\ua0two\ua0photometers\ua0are\ua0the\ua0most\ua0accurate\ua0'time\ua0machines'\ua0available\ua0to\ua0optical\ua0astronomy.\ua0Under\ua0the\ua0control\ua0of\ua0a\ua0GPS\ua0receiver\ua0and\ua0a\ua0Rubidium\ua0clock,\ua0the\ua0arrival\ua0time\ua0of\ua0each\ua0detected\ua0photon\ua0is\ua0referenced\ua0to\ua0UTC\ua0with\ua0a\ua0precision\ua0better\ua0than\ua0500\ua0picoseconds,\ua0continuously\ua0for\ua0hours\ua0of\ua0data\ua0acquisition.\ua0Light\ua0curves\ua0for\ua0three\ua0optical\ua0pulsars\ua0(Crab,\ua0B0540\u201069,\ua0Vela)\ua0will\ua0be\ua0reported.\ua0Results\ua0from\ua0simultaneous\ua0observations\ua0of\ua0the\ua0Crab\ua0pulsar\ua0with\ua0the\ua0Jodrell\ua0Bank\ua0RadioTelescope\ua0will\ua0also\ua0be\ua0reported. \ua