Zobrazeno 1 - 10
of 1 352
pro vyhledávání: '"Hickman, R."'
Autor:
Dhillon, V. S., Marsh, T. R., Atkinson, D. C., Bezawada, N., Bours, M. C. P., Copperwheat, C. M., Gamble, T., Hardy, L. K., Hickman, R. D. H., Irawati, P., Ives, D. J., Kerry, P., Leckngam, A., Littlefair, S. P., McLay, S. A., O'Brien, K., Peacocke, P. T., Poshyachinda, S., Richichi, A., Soonthornthum, B., Vick, A.
ULTRASPEC is a high-speed imaging photometer mounted permanently at one of the Nasmyth focii of the 2.4-m Thai National Telescope (TNT) on Doi Inthanon, Thailand's highest mountain. ULTRASPEC employs a 1024x1024 pixel frame-transfer, electron-multipl
Externí odkaz:
http://arxiv.org/abs/1408.2733
Autor:
Bento, J., Wheatley, P. J., Copperwheat, C. M., Fortney, J. J., Dhillon, V. S., Hickman, R., Littlefair, S. P., Marsh, T. R., Parsons, S. G., Southworth, J.
We present ground-based high-precision observations of the transit of WASP-17b using the multi-band photometer ULTRACAM on ESO's NTT in the context of performing transmission spectrophotometry of this highly inflated exoplanet. Our choice of filters
Externí odkaz:
http://arxiv.org/abs/1310.3893
Transmission photometry of WASP-12b: simultaneous measurement of the planetary radius in three bands
Autor:
Copperwheat, C. M., Wheatley, P. J., Southworth, J., Bento, J., Marsh, T. R., Dhillon, V. S., Fortney, J. J., Littlefair, S. P., Hickman, R.
Transmission spectroscopy has been successfully used from both the ground and in space to characterise the atmospheres of transiting exoplanets. This technique is challenging from the ground because ground-based spectrographs tend not to be designed
Externí odkaz:
http://arxiv.org/abs/1305.4166
Publikováno v:
In Transport Policy January 2019 73:62-70
Autor:
Pyrzas, S., Gaensicke, B. T., Thorstensen, J. R., Aungwerojwit, A, Boyd, D., Brady, S., Casares, J., Hickman, R. D. G., Marsh, T. R., Miller, I., Ogmen, Y., Pietz, J., Poyner, G., Rodriguez-Gil, P., Staels, B.
We identify HS 2325+8205 as an eclipsing, frequently outbursting dwarf nova with an orbital period of 279.841731(5) min. Spectroscopic observations are used to derive the radial velocity curve of the secondary star from absorption features and also f
Externí odkaz:
http://arxiv.org/abs/1201.6556
Autor:
Copperwheat, C. M., Marsh, T. R., Parsons, S. G., Hickman, R., Steeghs, D., Breedt, E., Dhillon, V. S., Littlefair, S. P., Savoury, C.
Purely photometric models can be used to determine the binary parameters of eclipsing cataclysmic variables with a high degree of precision. However, the photometric method relies on a number of assumptions, and to date there have been very few indep
Externí odkaz:
http://arxiv.org/abs/1111.6775
Autor:
Parsons, S. G., Marsh, T. R., Gänsicke, B. T., Rebassa-Mansergas, A., Dhillon, V. S., Littlefair, S. P., Copperwheat, C. M., Hickman, R. D. G., Burleigh, M. R., Kerry, P., Koester, D., Gómez-Morán, A. Nebot, Pyrzas, S., Savoury, C. D. J., Schreiber, M. R., Schmidtobreick, L., Schwope, A. D., Steele, P. R., Tappert, C.
We use a combination of X-shooter spectroscopy, ULTRACAM high-speed photometry and SOFI near-infrared photometry to measure the masses and radii of both components of the eclipsing post common envelope binaries SDSS J1212-0123 and GK Vir. For both sy
Externí odkaz:
http://arxiv.org/abs/1111.5694
Autor:
Dhillon, V. S., Marsh, T. R., Littlefair, S. P., Copperwheat, C. M., Hickman, R. D. G., Kerry, P., Levan, A. J., Rea, N., Savoury, C. D. J., Tanvir, N. R., Turolla, R., Wiersema, K.
We present high-speed optical photometry of the soft gamma repeater SGR 0501+4516, obtained with ULTRACAM on two consecutive nights approximately 4 months after the source was discovered via its gamma-ray bursts. We detect SGR 0501+4516 at a magnitud
Externí odkaz:
http://arxiv.org/abs/1106.1355
Autor:
Savoury, C. D. J., Littlefair, S. P., Dhillon, V. S., Marsh, T. R., Gaensicke, B. T., Copperwheat, C. M., Kerry, P., Hickman, R. D. G., Parsons, S. G.
We present high-speed, three-colour photometry of the eclipsing cataclysmic variables CTCV 1300, CTCV 2354 and SDSS 1152. All three systems are below the observed "period gap" for cataclysmic variables. For each system we determine the system paramet
Externí odkaz:
http://arxiv.org/abs/1103.2713