Abstract
| Original language | Undefined |
|---|---|
| Pages (from-to) | 1-20 |
| Number of pages | 20 |
| Journal | Astronomy & astrophysics |
| Volume | 543 |
| Issue number | A66 |
| DOIs | |
| Publication status | Published - 27 Jun 2012 |
Keywords
- EWI-22107
- IR-80985
- METIS-287956
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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.; Bähren, L.; Bell, M.E.; Broderick, J.W.; Corbel, S.; Daw, E.J.; Dhillon, V.S.; Eislöffel, 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, Marinus Jan; Bernardi, G.; Best, P.; Bonafede, A.; Boonstra, A.J.; Brentjens, M.; Brouw, W.N.; Brüggen, 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.; Orrú, E.; Paas, H.; Pandey-Pommier, M.; Pandey, V.N.; Pizzo, R.; Polatidis, A.; Reich, W.; Röttgering, H.; Sluman, J.; Steinmetz, M.; Sterks, C.G.M.; Tagger, M.; Tang, Y.; Tasse, C.; Vermeulen, R.; van Weeren, R.J.; Wijnholds, S.J.; Yatawatta, S.
In: Astronomy & astrophysics, Vol. 543, No. A66, 27.06.2012, p. 1-20.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Wide-band simultaneous observations of pulsars: disentangling dispersion measure and profile variations
AU - Hassall, T.E.
AU - Stappers, B.W.
AU - Hessels, J.W.T.
AU - Kramer, M.
AU - Alexov, A.
AU - Anderson, K.
AU - Coenen, T.
AU - Karastergiou, A.
AU - Keane, E.F.
AU - Kondratiev, V.I.
AU - Lazaridis, K.
AU - van Leeuwen, J.
AU - Noutsos, A.
AU - Serylak, M.
AU - Sobey, C.
AU - Verbiest, J.P.W.
AU - Weltevrede, P.
AU - Zagkouris, K.
AU - Fender, R.
AU - Wijers, R.A.M.J.
AU - Bähren, L.
AU - Bell, M.E.
AU - Broderick, J.W.
AU - Corbel, S.
AU - Daw, E.J.
AU - Dhillon, V.S.
AU - Eislöffel, J.
AU - Falcke, H.
AU - Griessmeier, J.M.
AU - Jonker, P.
AU - Law, C.
AU - Markoff, S.
AU - Miller-Jones, J.C.A
AU - Osten, R.
AU - Rol, E.
AU - Scaife, A.M.M.
AU - Scheers, B.
AU - Schellart, P.
AU - Spreeuw, H.
AU - Swinbank, J.
AU - ter Veen, S.
AU - Wise, M.W.
AU - Wijnands, R.
AU - Wucknitz, O.
AU - Zarka, P.
AU - Asgekar, A.
AU - Bell, M.R.
AU - Bentum, Marinus Jan
AU - Bernardi, G.
AU - Best, P.
AU - Bonafede, A.
AU - Boonstra, A.J.
AU - Brentjens, M.
AU - Brouw, W.N.
AU - Brüggen, M.
AU - Butcher, H.R.
AU - Ciardi, B.
AU - Garrett, M.A.
AU - Gerbers, M.
AU - Gunst, A.W.
AU - van Haarlem, M.P.
AU - Heald, G.
AU - Hoeft, M.
AU - Holties, H.
AU - de Jong, A.
AU - Koopmans, L.V.E
AU - Kuniyoshi, M.
AU - Kuper, G.
AU - Loose, G.M.
AU - Maat, P.
AU - Masters, J.
AU - McKean, J.P.
AU - Meulman, H.
AU - Mevius, M.
AU - Munk, H.
AU - Noordam, J.E.
AU - Orrú, E.
AU - Paas, H.
AU - Pandey-Pommier, M.
AU - Pandey, V.N.
AU - Pizzo, R.
AU - Polatidis, A.
AU - Reich, W.
AU - Röttgering, H.
AU - Sluman, J.
AU - Steinmetz, M.
AU - Sterks, C.G.M.
AU - Tagger, M.
AU - Tang, Y.
AU - Tasse, C.
AU - Vermeulen, R.
AU - van Weeren, R.J.
AU - Wijnholds, S.J.
AU - Yatawatta, S.
N1 - eemcs-eprint-22107
PY - 2012/6/27
Y1 - 2012/6/27
N2 - 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 40–190 MHz), the 76-m Lovell Telescope (at 1400 MHz) and the Effelsberg 100-m Telescope (at 8000 MHz) 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 ISM 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
AB - 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 40–190 MHz), the 76-m Lovell Telescope (at 1400 MHz) and the Effelsberg 100-m Telescope (at 8000 MHz) 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 ISM 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
KW - EWI-22107
KW - IR-80985
KW - METIS-287956
U2 - 10.1051/0004-6361/201218970
DO - 10.1051/0004-6361/201218970
M3 - Article
VL - 543
SP - 1
EP - 20
JO - Astronomy & astrophysics
JF - Astronomy & astrophysics
SN - 0004-6361
IS - A66
ER -