Personal profile

Overview

Klaas Wiersema is a Dutch astrophysicist, specialised in the observational study of transient sources, in particular sources that emit time-variable polarised light. He has published many papers in refereed journals on topics ranging from gravitational wave sources to orbiting satellites, and has been active in building, commissioning and calibrating several astronomical instruments and observatories. Before coming to the University of Hertfordshire, Klaas worked at the University of Lancaster, University of Warwick, University of Leicester and the University of Amsterdam. 

Research interests

  • Classification and characterisation of astrophysical transient sources
  • Polarimetry as probe of non-thermal emission processes in transient sources
  • The electromagnetic counterparts of gravitational wave and neutrino sources (i.e. multi-messenger astronomy)
  • Using spectroscopy of transients to probe high-redshift galaxy properties and cosmology
  • Polarimetry as a quantitative tool in Space Domain Awareness (SDA)
  • Bubbles blown by the jets and accretion disks of X-ray binaries
  • Polarimetric properties of potentially hazardous asteroids (PHAs)

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Collaborations and top research areas from the last five years

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  • A survey for variable young stars with small telescopes – IX. Evolution of spot properties on YSOs in IC 5070

    Herbert, C., Froebrich, D., Vanaverbeke, S., Scholz, A., Eislöffel, J., Urtly, T., Walton, I. L., Wiersema, K., Quinn, N. J., Piehler, G., Aimar, M. M., García, R. C., Vanmunster, T., Alfaro, F. C. S., de la Cuesta, F. G., Licchelli, D., Perez, A. E., Mañanes, E. F., Ribes, N. G., González, J. L. S., & 28 othersFutcher, S. R. L., Nelson, T., Dvorak, S., Moździerski, D., Kotysz, K., Mikołajczyk, P., Fleming, G., Phillips, M., Vale, T., Dubois, F., Eggenstein, H-B., Heald, M. A., Lewin, P., OKeeffe, D., Popowicz, A., Bernacki, K., Malcher, A., Lasota, S., Fiolka, J., Dustor, A., Percy, S. C., Devine, P., Patel, A. L., Dickers, M. D., Dover, L., Grozdanova, I. I., Urquhart, J. S. & Lynch, C. J. R., 1 Apr 2024, In: Monthly Notices of the Royal Astronomical Society. 529, 4, p. 4856-4878 23 p.

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  • A survey for variable young stars with small telescopes – VIII. Properties of 1687 Gaia selected members in 21 nearby clusters

    Froebrich, D., Scholz, A., Campbell-White, J., Vanaverbeke, S., Herbert, C., Eislöffel, J., Urtly, T., Long, T. P., Walton, I. L., Wiersema, K., Quinn, N. J., Rodda, T., González-Carballo, J-L., Morales Aimar, M., Castillo García, R., Soldán Alfaro, F. C., García de la Cuesta, F., Licchelli, D., Escartin Perez, A., Salto González, J. L., & 43 othersDeldem, M., Futcher, S. R. L., Nelson, T., Dvorak, S., Moździerski, D., Kotysz, K., Mikołajczyk, P., Fleming, G., Phillips, M., Vale, T., Öğmen, Y., Dubois, F., Rolfe, S. M., Campbell, D. A., Eggenstein, H-B., Hambsch, F-J., Heald, M. A., Lewin, P., Rose, A. C., Stone, G., Crow, M. V., Dawes, S. F., OKeeffe, D., Popowicz, A., Bernacki, K., Malcher, A., Lasota, S., Fiolka, J., Dustor, A., Vajpayee, A., Devine, P., Kolb, M., Marquette, J-B., Ruppel, G. L., Crowson, D. R., da Silva, C. M., Michaud, M., Patel, A. L., Dickers, M. D., Dover, L., Grozdanova, I. I., Urquhart, J. S. & Lynch, C. J. R., 1 Feb 2024, In: Monthly Notices of the Royal Astronomical Society. 529, 2, p. 1283-1298 16 p.

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  • GRB 230911A: The First Discovery of a Fermi GRB Optical Counterpart with the Gravitational-wave Optical Transient Observer (GOTO)

    Belkin, S., Gompertz, B. P., Kumar, A., Ackley, K., Galloway, D. K., Jiménez-Ibarra, F., Killestein, T. L., O’Neill, D., Wiersema, K., Malesani, D. B., Levan, A. J., Lyman, J., Dyer, M. J., Ulaczyk, K., Steeghs, D., Dhillon, V. S., O’Brien, P., Ramsay, G., Noysena, K., Kotak, R., & 33 othersBreton, R. P., Nuttall, L. K., Palle, E., Pollacco, D., Awiphan, S., Burhanudin, U., Chote, P., Chrimes, A., Daw, E., Duffy, C., Eyles-Ferris, R., Godson, B., Heikkilä, T., Irawati, P., Kelsey, L., Kennedy, M. R., Littlefair, S., Makrygianni, L., Marsh, T., Mata Sánchez, D., Mattila, S., Maund, J., McCormac, J., Mkrtichian, D., Mullaney, J., Patel, M., Rana, J., Rol, E., Sawangwit, U., Stanway, E., Starling, R., Strøm, P. A. & Warwick, B., 4 Jan 2024, In: Research Notes of the American Astronomical Society . 8, 1, p. 1-4 4 p., 6.

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  • The cosmic build-up of dust and metals: Accurate abundances from GRB-selected star-forming galaxies at 1.7 < z < 6.3

    Heintz, K. E., Cia, A. D., Thöne, C. C., Krogager, J. -K., Yates, R. M., Vejlgaard, S., Konstantopoulou, C., Fynbo, J. P. U., Watson, D., Narayanan, D., Wilson, S. N., Arabsalmani, M., Campana, S., D'Elia, V., Pasquale, M. D., Hartmann, D. H., Izzo, L., Jakobsson, P., Kouveliotou, C., Levan, A., & 21 othersLi, Q., Malesani, D. B., Melandri, A., Milvang-Jensen, B., Møller, P., Palazzi, E., Palmerio, J., Petitjean, P., Pugliese, G., Rossi, A., Saccardi, A., Salvaterra, R., Savaglio, S., Schady, P., Stratta, G., Tanvir, N. R., Postigo, A. D. U., Vergani, S. D., Wiersema, K., Wijers, R. A. M. J. & Zafar, T., 15 Nov 2023, In: Astronomy & Astrophysics. 679, November 2023, p. 1-15 15 p., A91.

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  • A LOFAR prompt search for radio emission accompanying X-ray flares in GRB 210112A

    Hennessy, A., Starling, R. L. C., Rowlinson, A., Ruiter, I. D., Kumar, A., Eyles-Ferris, R. A. J., Ror, A. K., Anderson, G. E., Gourdji, K., Horst, A. J. V. D., Pandey, S. B., Shimwell, T. W., Steeghs, D., Stylianou, N., Veen, S. T., Wiersema, K. & Wijers, R. A. M. J., 1 Nov 2023, In: Monthly Notices of the Royal Astronomical Society. 526, 1, p. 106–117 12 p.

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