We present a timing analysis of the transitional millisecond pulsar PSR J1023+0038 using observations taken between 2018 January and 2020 January with the high time resolution photon counter Aqueye+ mounted at the 1.82 m Copernicus telescope in Asiago. We report the first measurement of the timing solution and the frequency derivative of PSR J1023+0038 based entirely on optical data. The spin-down rate of the pulsar is (-2.53 +/- 0.04) x 10(-15) Hz(2), which is similar to 20 per cent slower than that measured from the X-ray observations taken in 2013-2016 and similar to 5 per cent faster than that measured in the radio band during the rotation-powered state.
Spin-down rate of the transitional millisecond pulsar PSR J1023+0038 in the optical band with Aqueye+ / Burtovoi, Aleksandr; Zampieri, Luca; Fiori, Michele; Naletto, Giampiero; Spolon, Alessia; Barbieri, Cesare; Papitto, Alessandro; Ambrosino, Filippo. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. LETTERS. - ISSN 1745-3925. - ELETTRONICO. - 498:(2020), pp. 0-0. [10.1093/mnrasl/slaa133]
Spin-down rate of the transitional millisecond pulsar PSR J1023+0038 in the optical band with Aqueye+
Burtovoi, Aleksandr;
2020
Abstract
We present a timing analysis of the transitional millisecond pulsar PSR J1023+0038 using observations taken between 2018 January and 2020 January with the high time resolution photon counter Aqueye+ mounted at the 1.82 m Copernicus telescope in Asiago. We report the first measurement of the timing solution and the frequency derivative of PSR J1023+0038 based entirely on optical data. The spin-down rate of the pulsar is (-2.53 +/- 0.04) x 10(-15) Hz(2), which is similar to 20 per cent slower than that measured from the X-ray observations taken in 2013-2016 and similar to 5 per cent faster than that measured in the radio band during the rotation-powered state.
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