Browsing by Author "Packham, C."

Now showing items 1-17 of 17

    • CanariCam-Polarimetry: A Dual-Beam 10 m Polarimeter for the GTC 

      Packham, C.; Hough, J.; Telesco, C.M. (Astronomical Society of the Pacific, 2005)
      The advent of large (¸8m) telescopes, along with the new breed of mid-IR instrumentation, has opened a new window to di®raction-limited polarimetry. CanariCam, nearing completion at the University of Florida for the 10m ...

    • CanariCam: a multimode mid-infrared camera for the Gran Telescopio CANARIAS 

      Telesco, C.M.; Ciardi, D.; French, J.; Ftaclas, C.; Hanna, K.T.; Hough, J.; Julian, J.; Kidger, M.; Packham, C.; Pina, R.K.; Varosi, F.; Sellar, R.G. (Int Soc for Optical Engineering, 2003)
      The University of Florida is developing a mid-infrared camera for the 10.4-meter Gran Telescopio CANARIAS. CanariCam has four science modes and two engineering modes, which use the same 320 x 240-pixel, arsenic-doped ...

    • The Extended Mid-Infrared Structure of the Circinus Galaxy 

      Packham, C.; Radomski, J.; Roche, P.F.; Aitken, D.; Perlman, E.; Alonso-Herrero, A.; Colina, L.; Telesco, C.M. (2005)

    • Gemini mid-IR polarimetry of NGC1068: polarized structures around the nucleus 

      Packham, C.; Young, S.; Fisher, R.S.; Volk, K.; Mason, R.E.; Hough, J.; Roche, P.F.; Elitzur, M.; Radomski, J.; Perlman, E. (2007)

    • GRB 001109: deep JHK upper limits 

      Vreeswijk, P.M.; Rol, E.; Packham, C.; Tanvir, N.; Kouveliotou, C.; Wijers, R.A.M.J.; Knapen, J. (2000)
      We observed the field of GRB 001109 [1] in J, H and Ks with INGRID on the 4.2m William Herschel Telescope on La Palma, Canary Islands on Nov. 9.8 and 11.8 UT, respectively 10 and 59 hours after the burst. The 50" radius ...

    • Highly polarized structures in the near-nuclear regions of Cygnus A: intrinsic anisotropy within the cones 

      Tadhunter, C.N.; Sparks, W.; Axon, D.J.; Bergeron, L.; Jackson, N.; Packham, C.; Hough, J.; Robinson, A.; Young, S. (2000)
      We present near-IR imaging polarimetry observations of the nucleus of Cygnus A, taken with the NICMOS camera of the HST at a wavelength of 2.0μm. These maps reveal a highly collimated region of polarized emission straddling ...

    • INGRID: A near-infrared camera for the William Herschel Telescope 

      Packham, C.; Thompson, K.L.; Zurita, A.; Knapen, J.; Smail, I.; Greimel, R.; Folha, D.F.M.; Benn, C.; Humphrey, A.; Rutten, R.; Ciardi, D.; Bec, M.; Bingham, R.; Craig, S.; Dee, K.; Ives, D.; Jolley, P.; Moore, P.; Puig, M.; Rees, S.; Talbot, G.; Worswick, S. (2003)
      Rapid developments in near-infrared (NIR) arrays and adaptive optics systems have driven the development of wide-field and high-spatial-resolution, high-optical-quality NIR imagers and spectrographs, providing an unparalleled ...

    • Magnetic field structures in star-forming regions : mid-infrared imaging polarimetry of K3-50 

      Barnes, Peter; Li, D.; Telesco, C.; Tanakul, N.; Mariñas, N.; Wright, C.; Packham, C.; Pantin, E.; Roche, P.; Hough, J.H. (2015-11-01)
      We report new imaging polarimetry observations of the Galactic compact H ii region K3-50 using CanariCam at the Gran Telescopio Canarias. We use a standard polarimetric analysis technique, first outlined by Aitken, to ...

    • Mid-infrared, spatially resolved spectroscopy of the nucleus of the Circinus galaxy 

      Roche, P.F.; Packham, C.; Telesco, C.M.; Radomski, J.; Alonso-Herrero, A.; Aitken, D.; Colina, L.; Perlman, E. (2006)

    • Mid-IR spectra of type Ia SN 2014J in M82 spanning the first 4 months 

      Telesco, C.M.; Hoflich, P.; Li, D.; Alvarez, C.; Wright, C.M.; Barnes, P.J.; Fernandez, S.; Hough, James; Levenson, N.A.; Marinas, N.; Packham, C.; Pantin, E.; Rebolo, R.; Roche, P.; Zhang, H. (2015-01-10)
      We present a time series of 8-13 μm spectra and photometry for SN 2014J obtained 57, 81, 108, and 137 days after the explosion using CanariCam on the Gran Telescopio Canarias. This is the first mid-IR time series ever ...

    • Near-infrared and millimetre polarimetry of CEN A 

      Packham, C.; Hough, J.; Young, S.; Chrysostomou, A.; Bailey, J.; Axon, D.J.; Ward, M.J. (1996)
      We present near-infrared polarization images of the nuclear region of CenA, and millimetre polarimetry of the nucleus. In the near-infrared the polarization vectors mainly lie along the dust lane, with the polarization ...

    • Near-infrared imaging polarimetry and modelling of NGC 4151 

      Ruiz, M.; Packham, C.; Alexander, D.M.; Hough, J.; Young, S. (2003)

    • Near-infrared imaging polarimetry of Cygnus A 

      Packham, C.; Young, S.; Hough, J.; Tadhunter, C.N.; Axon, D.J. (1998)
      We present a 2.2-μm polarization image of the nuclear regions of Cygnus A. The degree of polarization in the central 1 arcsec is (4.1±0.50) per cent, at a position angle of (23.6±3.6)°, approximately perpendicular to the ...

    • Near-infrared imaging polarimetry of NGC 1068 

      Packham, C.; Young, S.; Hough, J.; Axon, D.J.; Bailey, J. (1997)
      We present near-infrared polarization images of the nuclear region of NGC 1068. For the first time, extended reflection nebulosity from the south-western cone, which is obscured at optical wavelengths, is detected. Polarized ...

    • The nuclear torus in the active galaxy NGC 1068 

      Young, S.; Packham, C.; Hough, J.; Efstathiou, A. (1996)
      We present near-infrared polarized images of the active galaxy NGC 1068. At these wavelengths, the counter-cone is observed in scattered light. At H (1.64 μm) we detect an absorption band across the counter-cone, which we ...

    • Polarimetry research at the University of Florida 

      Packham, C.; Hough, J.; Kolokolova, L.; Telesco, C.M. (2004)
      The advent of large ( or larger) telescopes along with the new breed of mid-IR instrumentation opens a new window to diffraction-limited investigations of the nature of faint or crowded field astronomical objects at mid-IR ...

    • Silicate absorption in heavily obscured galaxy nuclei 

      Roche, P.F.; Packham, C.; Aitken, D.; Mason, R.E. (2007)