SIMBAD references

2012A&A...543A..66H - Astronomy and Astrophysics, volume 543A66-66 (2012/7-1)

Wide-band simultaneous observations of pulsars: disentangling dispersion measure and profile variations.

HASSALL T.E., STAPPERS B.W., HESSELS J.W.T., KRAMER M., ALEXOV A., ANDERSON K., COENEN T., KARASTERGIOU A., KEANE E.F., KONDRATIEV V.I., LAZARIDIS K., VAN LEEUWEN J., NOUTSOS A., SERYLAK M., SOBEY C., VERBIEST J.P.W., WELTEVREDE P., ZAGKOURIS K., FENDER R., WIJERS R.A.M.J., BAEHREN L., BELL M.E., BRODERICK J.W., CORBEL S., DAW E.J., DHILLON V.S., EISLOEFFEL J., FALCKE H., GRIESSMEIER J.-M., JONKER P., LAW C., MARKOFF S., MILLER-JONES J.C.A., OSTEN R., ROL E., SCAIFE A.M.M., SCHEERS B., SCHELLART P., SPREEUW H., SWINBANK J., TER VEEN S., WISE M.W., WIJNANDS R., WUCKNITZ O., ZARKA P., ASGEKAR A., BELL M.R., BENTUM M.J., BERNARDI G., BEST P., BONAFEDE A., BOONSTRA A.-J., BRENTJENS M., BROUW W.N., BRUEGGEN M., BUTCHER H.R., CIARDI B., GARRETT M.A., GERBERS M., GUNST A.W., VAN HAARLEM M.P., HEALD G., HOEFT M., HOLTIES H., DE JONG A., KOOPMANS L.V.E., KUNIYOSHI M., KUPER G., LOOSE G.M., MAAT P., MASTERS J., McKEAN J.P., MEULMAN H., MEVIUS M., MUNK H., NOORDAM J.E., ORRU E., PAAS H., PANDEY-POMMIER M., PANDEY V.N., PIZZO R., POLATIDIS A., REICH W., ROETTGERING H., SLUMAN J., STEINMETZ M., STERKS C.G.M., TAGGER M., TANG Y., TASSE C., VERMEULEN R., VAN WEEREN R.J., WIJNHOLDS S.J. and YATAWATTA S.

Abstract (from CDS):

Dispersion in the interstellar medium is a well known phenomenon that follows a simple relationship, which has been used to predict the time delay of dispersed radio pulses since the late 1960s. We performed wide-band simultaneous observations of four pulsars with LOFAR (at 40-190MHz), the 76-m Lovell Telescope (at 1400MHz) and the Effelsberg 100-m Telescope (at 8000MHz) to test the accuracy of the dispersion law over a broad frequency range. In this paper we present the results of these observations which show that the dispersion law is accurate to better than 1 part in 105 across our observing band. We use this fact to constrain some of the properties of the interstellar medium along the line-of-sight and use the lack of any aberration or retardation effects to determine upper limits on emission heights in the pulsar magnetosphere. We also discuss the effect of pulse profile evolution on our observations, and the implications that it could have for precision pulsar timing projects such as the detection of gravitational waves with pulsar timing arrays.

Abstract Copyright: ∼

Journal keyword(s): pulsars: general - ISM: general - magnetic fields - telescopes

CDS comments: Paragraph 6.3 B0832+26 is a misprint for PSR B0823+26.

Simbad objects: 13

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