Browsing Exact and Earth Sciences by Author "Packham, Christopher"
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Spitzer space telescope measurements of dust reverberation lags in the Seyfert 1 galaxy NGC 6418
Vasquez, Billy; Galianni, Pasquale; Richmond, Michael; Robinson, Andrew; Axon, David J.; Horne, Keith; Almeyda, Triana; Fausnaugh, Michael; Peterson, Bradley M.; Bottorff, Mark; Gallimore, Jack F.; Elitzur, Moshe; Netzer, Hagai; Storchi-Bergmann, Thaisa; Marconi, A.; Capetti, A.; Batcheldor, Dan; Buchanan, Catherine; Stirpe, Giovanna M.; Kishimoto, Makoto; Packham, Christopher; Pérez Jiménez, Enrique; Tadhunter, Clive; Upton, John; Estrada-Carpenter, Vicente (2015) [Journal article]We present results from a 15 month campaign of high-cadence (∼3 days) mid-infrared Spitzer and optical (B and V) monitoring of the Seyfert 1 galaxy NGC 6418, with the objective of determining the characteristic size of the ... -
The first spectroscopic dust reverberation programme on active galactic nuclei : the torus in NGC 5548
Landt, Hermine; Ward, Martin John; Kynoch, Daniel; Packham, Christopher; Ferland, Gary J.; Lawrence, Andy; Pott, Jörg-Uwe; Esser, Johannes; Horne, Keith; Starkey, David A.; Malhotra, Deepak; Fausnaugh, Michael; Peterson, Bradley M.; Wilman, Richard J.; Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Barth, Aaron J.; Villforth, Carolin; Winkler, Hartmut (2019) [Journal article]We have recently initiated the first spectroscopic dust reverberation programme on active galactic nuclei in the near-infrared. Spectroscopy enables measurement of dust properties, such as flux, temperature, and covering ...