Results of 12 yr of Pulsar Timing at Nanshan. I.
نویسندگان
چکیده
منابع مشابه
Pulsar Timing at Urumqi Astronomical Observatory: Observing System and Results
A pulsar timing system has been operating in the 18-cm band at the Urumqi Astronomical Observatory 25-m telescope since mid-1999. Frequency resolution allowing dedispersion of the pulsar signals is provided by a 2×128×2.5 MHz filterbank/digitiser system. Observations of 74 pulsars over more than 12 months have resulted in updated pulsar periods and period derivatives, as well as improved positi...
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We have continued our long term study of the double-neutron-star binary pulsar PSR B1534+12, using new instrumentation to make very high precision measurements at the Arecibo Observatory. We have significantly improved our solution for the astrometric, spin, and orbital parameters of the system, as well – 2 – as for the five " post-Keplerian " orbital parameters that can be used to test grav-it...
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The motivation for radio pulsar timing and its basic principles are reviewed. Present and future radio timing techniques and hardware are summarised and compared. The array of present timing programmes and their scientific goals are collated and described. Recent results and future prospects are discussed, with emphasis on multi-wavelength techniques where appropriate. Timing of radio pulsars a...
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Contemporary pulsar timing experiments have reached a sensitivity level where systematic errors introduced by existing analysis procedures are limiting the achievable science. We have developed tempo2, a new pulsar timing package that contains propagation and other relevant effects implemented at the 1 ns level of precision (a factor of ∼ 100 more precise than previously obtainable). In contras...
متن کاملThe kinematics and orbital dynamics of the PSR B1259−63/LS 2883 system from 23 yr of pulsar timing
We present an analysis of 23 yr of pulse arrival times for PSR B1259−63. The pulsar is in a binary orbit about its approximately 20 M companion LS 2883. Our best-fitting timing solution has none of the pulse-number ambiguities that have plagued previous attempts to model the binary orbit. We measure significant first and second time derivatives of the projected semimajor axis and longitude of t...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2020
ISSN: 1538-4357
DOI: 10.3847/1538-4357/ab9082