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

T.E. Hassall; B.W. Stappers; J.W.T. Hessels; M. Kramer; A. Alexov; K. Anderson; T. Coenen; A. Karastergiou; E.F. Keane; V.I. Kondratiev; K. Lazaridis; J. van Leeuwen; A. Noutsos; M. Serylak; C. Sobey; J.P.W. Verbiest; P. Weltevrede; K. Zagkouris; R. Fender; R.A.M.J. Wijers; L. Bähren; M.E. Bell; J.W. Broderick; S. Corbel; E.J. Daw; V.S. Dhillon; J. Eislöffel; H. Falcke; J.M. Griessmeier; P. Jonker; C. Law; S. Markoff; J.C.A Miller-Jones; R. Osten; E. Rol; A.M.M. Scaife; B. Scheers; P. Schellart; H. Spreeuw; J. Swinbank; S. ter Veen; M.W. Wise; R. Wijnands; O. Wucknitz; P. Zarka; A. Asgekar; M.R. Bell; Marinus Jan Bentum; G. Bernardi; P. Best; A. Bonafede; A.J. Boonstra; M. Brentjens; W.N. Brouw; M. Brüggen; H.R. Butcher; B. Ciardi; M.A. Garrett; M. Gerbers; A.W. Gunst; M.P. van Haarlem; G. Heald; M. Hoeft; H. Holties; A. de Jong; L.V.E Koopmans; M. Kuniyoshi; G. Kuper; G.M. Loose; P. Maat; J. Masters; J.P. McKean; H. Meulman; M. Mevius; H. Munk; J.E. Noordam; E. Orrú; H. Paas; M. Pandey-Pommier; V.N. Pandey; R. Pizzo; A. Polatidis; W. Reich; H. Röttgering; J. Sluman; M. Steinmetz; C.G.M. Sterks; M. Tagger; Y. Tang; C. Tasse; R. Vermeulen; R.J. van Weeren; S.J. Wijnholds; S. Yatawatta

doi:10.1051/0004-6361/201218970

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

T.E. Hassall, B.W. Stappers, J.W.T. Hessels, M. Kramer, A. Alexov, K. Anderson, T. Coenen, A. Karastergiou, E.F. Keane, V.I. Kondratiev, K. Lazaridis, J. van Leeuwen, A. Noutsos, M. Serylak, C. Sobey, J.P.W. Verbiest, P. Weltevrede, K. Zagkouris, R. Fender, R.A.M.J. WijersL. Bähren, M.E. Bell, J.W. Broderick, S. Corbel, E.J. Daw, V.S. Dhillon, J. Eislöffel, H. Falcke, J.M. Griessmeier, P. Jonker, C. Law, S. Markoff, J.C.A Miller-Jones, R. Osten, E. Rol, A.M.M. Scaife, B. Scheers, P. Schellart, H. Spreeuw, J. Swinbank, S. ter Veen, M.W. Wise, R. Wijnands, O. Wucknitz, P. Zarka, A. Asgekar, M.R. Bell, Marinus Jan Bentum, G. Bernardi, P. Best, A. Bonafede, A.J. Boonstra, M. Brentjens, W.N. Brouw, M. Brüggen, H.R. Butcher, B. Ciardi, M.A. Garrett, M. Gerbers, A.W. Gunst, M.P. van Haarlem, G. Heald, M. Hoeft, H. Holties, A. de Jong, L.V.E Koopmans, M. Kuniyoshi, G. Kuper, G.M. Loose, P. Maat, J. Masters, J.P. McKean, H. Meulman, M. Mevius, H. Munk, J.E. Noordam, E. Orrú, H. Paas, M. Pandey-Pommier, V.N. Pandey, R. Pizzo, A. Polatidis, W. Reich, H. Röttgering, J. Sluman, M. Steinmetz, C.G.M. Sterks, M. Tagger, Y. Tang, C. Tasse, R. Vermeulen, R.J. van Weeren, S.J. Wijnholds, S. Yatawatta

Research output: Contribution to journal › Article › Academic › peer-review

63 Citations (Scopus)

Abstract

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

Original language	Undefined
Pages (from-to)	1-20
Number of pages	20
Journal	Astronomy & astrophysics
Volume	543
Issue number	A66
DOIs	https://doi.org/10.1051/0004-6361/201218970
Publication status	Published - 27 Jun 2012

Keywords

EWI-22107
IR-80985
METIS-287956

Access to Document

10.1051/0004-6361/201218970

http://eprints.eemcs.utwente.nl/secure2/22107/01/1204_3864v1.pdf

Cite this

Hassall, T. E., Stappers, B. W., Hessels, J. W. T., Kramer, M., Alexov, A., Anderson, K., ... Yatawatta, S. (2012). Wide-band simultaneous observations of pulsars: disentangling dispersion measure and profile variations. Astronomy & astrophysics, 543(A66), 1-20. https://doi.org/10.1051/0004-6361/201218970

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. / Wide-band simultaneous observations of pulsars: disentangling dispersion measure and profile variations. In: Astronomy & astrophysics. 2012 ; Vol. 543, No. A66. pp. 1-20.

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title = "Wide-band simultaneous observations of pulsars: disentangling dispersion measure and profile variations",

abstract = "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",

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author = "T.E. Hassall and B.W. Stappers and J.W.T. Hessels and M. Kramer and A. Alexov and K. Anderson and T. Coenen and A. Karastergiou and E.F. Keane and V.I. Kondratiev and K. Lazaridis and {van Leeuwen}, J. and A. Noutsos and M. Serylak and C. Sobey and J.P.W. Verbiest and P. Weltevrede and K. Zagkouris and R. Fender and R.A.M.J. Wijers and L. B{\"a}hren and M.E. Bell and J.W. Broderick and S. Corbel and E.J. Daw and V.S. Dhillon and J. Eisl{\"o}ffel and H. Falcke and J.M. Griessmeier and P. Jonker and C. Law and S. Markoff and J.C.A Miller-Jones and R. Osten and E. Rol and A.M.M. Scaife and B. Scheers and P. Schellart and H. Spreeuw and J. Swinbank and {ter Veen}, S. and M.W. Wise and R. Wijnands and O. Wucknitz and P. Zarka and A. Asgekar and M.R. Bell and Bentum, {Marinus Jan} and G. Bernardi and P. Best and A. Bonafede and A.J. Boonstra and M. Brentjens and W.N. Brouw and M. Br{\"u}ggen and H.R. Butcher and B. Ciardi and M.A. Garrett and M. Gerbers and A.W. Gunst and {van Haarlem}, M.P. and G. Heald and M. Hoeft and H. Holties and {de Jong}, A. and L.V.E Koopmans and M. Kuniyoshi and G. Kuper and G.M. Loose and P. Maat and J. Masters and J.P. McKean and H. Meulman and M. Mevius and H. Munk and J.E. Noordam and E. Orr{\'u} and H. Paas and M. Pandey-Pommier and V.N. Pandey and R. Pizzo and A. Polatidis and W. Reich and H. R{\"o}ttgering and J. Sluman and M. Steinmetz and C.G.M. Sterks and M. Tagger and Y. Tang and C. Tasse and R. Vermeulen and {van Weeren}, R.J. and S.J. Wijnholds and S. Yatawatta",

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Hassall, TE, Stappers, BW, Hessels, JWT, Kramer, M, Alexov, A, Anderson, K, Coenen, T, Karastergiou, A, Keane, EF, Kondratiev, VI, Lazaridis, K, van Leeuwen, J, Noutsos, A, Serylak, M, Sobey, C, Verbiest, JPW, Weltevrede, P, Zagkouris, K, Fender, R, Wijers, RAMJ, Bähren, L, Bell, ME, Broderick, JW, Corbel, S, Daw, EJ, Dhillon, VS, Eislöffel, J, Falcke, H, Griessmeier, JM, Jonker, P, Law, C, Markoff, S, Miller-Jones, JCA, Osten, R, Rol, E, Scaife, AMM, Scheers, B, Schellart, P, Spreeuw, H, Swinbank, J, ter Veen, S, Wise, MW, Wijnands, R, Wucknitz, O, Zarka, P, Asgekar, A, Bell, MR, Bentum, MJ, Bernardi, G, Best, P, Bonafede, A, Boonstra, AJ, Brentjens, M, Brouw, WN, Brüggen, M, Butcher, HR, Ciardi, B, Garrett, MA, Gerbers, M, Gunst, AW, van Haarlem, MP, Heald, G, Hoeft, M, Holties, H, de Jong, A, Koopmans, LVE, Kuniyoshi, M, Kuper, G, Loose, GM, Maat, P, Masters, J, McKean, JP, Meulman, H, Mevius, M, Munk, H, Noordam, JE, Orrú, E, Paas, H, Pandey-Pommier, M, Pandey, VN, Pizzo, R, Polatidis, A, Reich, W, Röttgering, H, Sluman, J, Steinmetz, M, Sterks, CGM, Tagger, M, Tang, Y, Tasse, C, Vermeulen, R, van Weeren, RJ, Wijnholds, SJ & Yatawatta, S 2012, 'Wide-band simultaneous observations of pulsars: disentangling dispersion measure and profile variations', Astronomy & astrophysics, vol. 543, no. A66, pp. 1-20. https://doi.org/10.1051/0004-6361/201218970

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 -