Measuring pulse times of arrival from broad-band pulsar observations

Liu K, Desvignes G, Cognard I, Stappers BW, Verbiest J, Lee KJ, Champion DJ, Kramer M, Freire PCC, Karuppusamy R (2014)
Monthly Notices of the Royal Astronomical Society 443(4): 3752-3760.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Liu, K.; Desvignes, G.; Cognard, I.; Stappers, B. W.; Verbiest, JorisUniBi ; Lee, K. J.; Champion, D. J.; Kramer, M.; Freire, P. C. C.; Karuppusamy, R.
Abstract / Bemerkung
In recent years, instrumentation enabling pulsar observations with unprecedentedly high fractional bandwidth has been under development which can be used to substantially improve the precision of pulsar timing experiments. The traditional template-matching method used to calculate pulse times of arrival (ToAs) may not function effectively on these broad-band data due to a variety of effects such as diffractive scintillation in the interstellar medium, profile variation as a function of frequency, dispersion measure (DM) evolution, and so forth. In this paper, we describe the channelized discrete Fourier transform method that can greatly mitigate the influence of the aforementioned effects when measuring ToAs from broad-band timing data. The method is tested on simulated data, and its potential in improving timing precision is shown. We further apply the method to PSR J1909-3744 data collected at the Nanc, ay Radio Telescope with the Nanc, ay Ultimate Pulsar Processing Instrument. We demonstrate removal of systematics due to the scintillation effect as well as improvement on ToA measurement uncertainties. Our method also determines temporal variations in DM, which are consistent with multichannel timing approaches used earlier.
Stichworte
J1909-3744); methods: data analysis; pulsars: general; pulsars: individual (PSR
Erscheinungsjahr
2014
Zeitschriftentitel
Monthly Notices of the Royal Astronomical Society
Band
443
Ausgabe
4
Seite(n)
3752-3760
ISSN
0035-8711
eISSN
1365-2966
Page URI
https://pub.uni-bielefeld.de/record/2703411

Zitieren

Liu K, Desvignes G, Cognard I, et al. Measuring pulse times of arrival from broad-band pulsar observations. Monthly Notices of the Royal Astronomical Society. 2014;443(4):3752-3760.
Liu, K., Desvignes, G., Cognard, I., Stappers, B. W., Verbiest, J., Lee, K. J., Champion, D. J., et al. (2014). Measuring pulse times of arrival from broad-band pulsar observations. Monthly Notices of the Royal Astronomical Society, 443(4), 3752-3760. doi:10.1093/mnras/stu1420
Liu, K., Desvignes, G., Cognard, I., Stappers, B. W., Verbiest, J., Lee, K. J., Champion, D. J., Kramer, M., Freire, P. C. C., and Karuppusamy, R. (2014). Measuring pulse times of arrival from broad-band pulsar observations. Monthly Notices of the Royal Astronomical Society 443, 3752-3760.
Liu, K., et al., 2014. Measuring pulse times of arrival from broad-band pulsar observations. Monthly Notices of the Royal Astronomical Society, 443(4), p 3752-3760.
K. Liu, et al., “Measuring pulse times of arrival from broad-band pulsar observations”, Monthly Notices of the Royal Astronomical Society, vol. 443, 2014, pp. 3752-3760.
Liu, K., Desvignes, G., Cognard, I., Stappers, B.W., Verbiest, J., Lee, K.J., Champion, D.J., Kramer, M., Freire, P.C.C., Karuppusamy, R.: Measuring pulse times of arrival from broad-band pulsar observations. Monthly Notices of the Royal Astronomical Society. 443, 3752-3760 (2014).
Liu, K., Desvignes, G., Cognard, I., Stappers, B. W., Verbiest, Joris, Lee, K. J., Champion, D. J., Kramer, M., Freire, P. C. C., and Karuppusamy, R. “Measuring pulse times of arrival from broad-band pulsar observations”. Monthly Notices of the Royal Astronomical Society 443.4 (2014): 3752-3760.

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