Browsing by Author "Knigge, C."

Now showing items 1-20 of 26

    • The application of Monte Carlo methods to the synthesis of spectral line profiles from accretion disc winds 

      Knigge, C.; Woods, J.A.; Drew, J.E. (1995)
      A Monte Carlo line profile synthesis method is presented which allows the radiative transfer of resonantly scattered lines through a stellar wind to be solved exactly. The resulting code is designed to be used primarily ...

    • Dips and eclipses in the X-ray binary Swift J1858.6-0814 observed with NICER 

      Buisson, D. J. K.; Altamirano, D.; Padilla, M. Armas; Arzoumanian, Z.; Bult, P.; Segura, N. Castro; Charles, P. A.; Degenaar, N.; Trigo, M. Díaz; Eijnden, J. van den; Fogantini, F.; Gandhi, P.; Gendreau, K.; Hare, J.; Homan, J.; Knigge, C.; Malacaria, C.; Mendez, M.; Darias, T. Muñoz; Ng, M.; Arabacı, M. Özbey; Remillard, R.; Strohmayer, T. E.; Tombesi, F.; Tomsick, J. A.; Vincentelli, F.; Walton, D. J. (2021-06-01)
      We present the discovery of eclipses in the X-ray light curves of the X-ray binary Swift J1858.6-0814. From these, we find an orbital period of $P=76841.3_{-1.4}^{+1.3}$ s ($\approx21.3$ hours) and an eclipse duration of ...

    • Discovering interacting binaries with Halpha surveys 

      Witham, A.R.; Knigge, C.; Drew, J.E.; Groot, P.; Greimel, R.; Parker, Q.A. (2004)

    • Discovering interacting binaries with Hα surveys 

      Witham, A.R.; Knigge, C.; Drew, J.E.; Groot, P.; Greimel, R.; Parker, Q. A. (American Institute of Physics (AIP), 2005)
      A deep (R ~ 19.5) photographic Hα Survey of the southern Galactic Plane was recently completed using the UK Schmidt Telescope at the AAO. In addition, we have recently started a similar, CCD-based survey of the northern ...

    • Eclipse observations of an accretion disc wind 

      Mason, K.O.; Drew, J.E.; Cordova, F.A.; Horne, K.; Hilditch, R.; Knigge, C.; Lanz, T.; Meylan, T. (1995)
      The Goddard High Resolution Spectrometer on the Hubble Space Telescope has been used to monitor, through eclipse, the C iv 1550-A and He ii 1640-A lines in the spectrum of the nova-like cataclysmic variable UX UMa. Previous ...

    • Eclipses of accretion disc winds in cataclysmic variables : an atlas of theoretical CIV line profiles and line flux light curves 

      Knigge, C.; Drew, J.E. (1996)
      A grid of simulated eclipses of the wind-formed CIV resonance line in high-state, non-magnetic cataclysmic variables is presented. On this, trends in pre- and mid-eclipse line profiles and also in the light curves of ...

    • The evolution of disks and winds in dwarf novae outbursts 

      Froning, C.S.; Long, K.S.; Drew, J.E.; Knigge, C.; Proga, D.; Mattei, J.A. (2002)

    • Five WC9 stars discovered in the AAO/UKST Ha survey 

      Hopewell, E.C.; Barlow, M.J.; Drew, J.E.; Unruh, Y.C.; Parker, Q.A.; Pierce, M.J.; Crowther, P.A.; Knigge, C.; Phillipps, S.; Zijlstra, A.A. (2005)

    • FUSE Observations of U Geminorum during Outburst and Decline 

      Froning, C.S.; Long, K.S.; Drew, J.E.; Knigge, C.; Proga, D. (2001)

    • The Gaia/IPHAS and Gaia/KIS value-added catalogues 

      Scaringi, S.; Knigge, C.; Drew, J. E.; Monguió, M.; Breedt, E.; Fratta, M.; Gänsicke, B.; Maccarone, T. J.; Pala, A. F.; Schill, C. (2018-12-11)
      We present a sub-arcsecond crossmatch of Gaia DR2 against the INT Photometric Ha Survey of the Northern Galactic Plane Data Release 2 (IPHAS DR2) and the Kepler-INT Survey (KIS). The resulting value-added catalogues (VACs) ...

    • High spatial resolution Galactic 3D extinction mapping with IPHAS 

      Sale, S.E.; Drew, J.E.; Unruh, Y.C.; Irwin, M.J.; Knigge, C.; Phillips, S.; Zijlstra, A.A.; Gansicke, B.T.; Greimel, R.; Groot, P.; Mampaso, A.; Morris, R.A.H.; Napiwotzki, R.; Steeghs, D.; Walton, N.A. (2009)
      We present an algorithm (MEAD, for ‘Mapping Extinction Against Distance’) which will determine intrinsic (r′−i′) colour, extinction, and distance for early-A to K4 stars extracted from the IPHAS r′/i′/Hα photometric data ...

    • Initial Data Release from the INT Photometric H-alpha Survey of the Northern Galactic Plane (IPHAS) 

      Gonzalez-Solares, E.; Walton, N.A.; Greimel, R.; Drew, J.E.; Irwin, M.J.; Sale, S.E.; Andrews, K.; Aungwerojwit, A.; Barlow, M.J.; van den Besselaar, E.; Corradi, R.L.M.; Gaensicke, B.T.; Groot, P.; Hales, A.; Hopewell, E.C.; Hu, H.; Irwin, J.; Knigge, C.; Lagadec, E.; Leisy, P.; Lewis, J.R.; Mampaso, A.; Matsuura, M.; Moont, B.; Morales-Rueda, L.; Morris, R.A.H.; Naylor, T.; Parker, Q. A.; Prema, P.; Pyrzas, S.; Rixon, G.T.; Rodriguez-Gil, P.; Roelofs, G.; Sabin, L.; Skillen, I.; Suso, J.; Tata, R.; Viironen, K.; Vink, J.S.; Witham, A.; Wright, Nick; Zijlstra, A.A.; Zurita, A.; Drake, J.; Fabregat, J.; Lennon, D.J.; Lucas, P.W.; Martin, E.L.; Phillipps, S.; Steeghs, D.; Unruh, Y.C. (2008)
      The INT/WFC Photometric Hα Survey of the Northern Galactic Plane (IPHAS) is an imaging survey being carried out in Hα, r′ and i′ filters, with the Wide Field Camera (WFC) on the 2.5-m Isaac Newton Telescope (INT) to a depth ...

    • Initial data release of the Kepler-INT survey 

      Greiss, S.; Steeghs, D.; Gaensicke, B. T.; Martin, E. L.; Groot, P. J.; Irwin, M.J.; Gonzalez-Solares, E.; Greimel, R.; Knigge, C.; Ostensen, R. H.; Verbeek, K.; Drew, J.E.; Drake, J.; Jonker, P. G.; Ripepi, V.; Scaringi, S.; Southworth, J.; Still, M.; Wright, Nick; Farnhill, H.; van Haaften, L. M.; Shah, S. (2012-07)
      This paper describes the first data release of the Kepler-INT Survey (KIS) that covers a 116 deg(2) region of the Cygnus and Lyra constellations. The Kepler field is the target of the most intensive search for transiting ...

    • The INT Photometric Ha Survey of the Northern Galactic Plane (IPHAS) 

      Drew, J.E.; Greimel, R.; Irwin, M.J.; Aungwerojwit, A.; Barlow, M.J.; Corradi, R.L.M.; Drake, J.; Gansicke, B.T.; Groot, P.; Hales, A.; Hopewell, E.C.; Irwin, J.; Knigge, C.; Leisy, P.; Lennon, D.J.; Mampaso, A.; Masheder, M.R.W.; Matsuura, M.; Morales-Rueda, L.; Morris, R.A.H.; Parker, Q.A.; Phillipps, S.; Rodriguez-Gil, P.; Roelofs, G.; Skillen, I.; Sokoloski, J.; Steeghs, D.; Unruh, Y.C.; Viironen, K.; Vink, J.S.; Walton, N.A.; Witham, A.R.; Wright, Nick; Zijlstra, A.A.; Zurita, A. (2005)

    • The IPHAS catalogue of Hα emission-line sources in the northern Galactic plane 

      Witham, A.R.; Knigge, C.; Drew, J.E.; Greimel, R.; Steeghs, D.; Gansicke, B.T.; Groot, P.; Mampaso, A. (2008)
      We present a catalogue of point-source Hα emission-line objects selected from the INT/WFC Photometric Hα Survey (IPHAS) of the northern Galactic plane.

    • Newly discovered cataclysmic variables from the INT/WFC photometric Ha survey of the northern Galactic plane 

      Witham, A.R.; Knigge, C.; Aungwerojwit, A.; Drew, J.E.; Gansicke, B.T.; Greimel, R.; Groot, P.; Roelofs, G.; Steeghs, D.; Woudt, P. (2007)

    • The orbital period of V458 Vulpeculae, a post-double common-envelope nova 

      Rodriguez-Gil, P.; Santander-Garcia, M.; Knigge, C.; Corradi, R.L.M.; Gansicke, B.T.; Barlow, M.J.; Drake, J.; Drew, J.E.; Miszalski, B.; Napiwotzki, R.; Steeghs, D.; Wesson, R.; Zijlstra, A.A.; Jones, D.H.; Liimets, T.; Munoz-Darias, T.; Pyrzas, S.; Rubio-Diez, M. (2010)
      We present time-resolved optical spectroscopy of V458 Vulpeculae (Nova Vul 2007 No. 1) spread over a period of 15 months starting 301 d after its discovery. Our data reveal radial-velocity variations in the He II lambda ...

    • A planetary nebula around Nova V458 Vulpeculae undergoing flash ionization 

      Wesson, R.; Barlow, M.J.; Corradi, R.L.M.; Drew, J.E.; Groot, P.; Knigge, C.; Steeghs, D.; Gaensicke, B.T.; Napiwotzki, R.; Rodriguez-Gil, P.; Zijlstra, A.A.; Bode, M.F.; Drake, J.; Frew, D.J.; Gonzalez-Solares, E.; Greimel, R.; Irwin, M.J.; Morales-Rueda, L.; Nelemans, G.; Parker, Q.A.; Sale, S.E. (2008)

    • Pre-eclipse dips in the ultraviolet light curves of two eclipsing nova-like cataclysmic variables 

      Mason, K.O.; Drew, J.E.; Knigge, C. (1997)
      Observations of the eclipsing nova-like variables UX UMa and RW Tri with the Hubble Space Telescope reveal substantial orbital modulations in their UV light. These modulations have a minimum about a quarter of an orbital ...

    • The properties of cataclysmic variables in photometric Ha surveys 

      Witham, A.R.; Knigge, C.; Gansicke, B.T.; Aungwerojwit, A.; Corradi, R.M.; Drew, J.E.; Greimel, R.; Groot, P.; Morales-Rueda, L.; Rodriguez-Flores, E.R.; Rodriguez-Gil, P.; Steeghs, D. (2006)