Browsing by Author "Southworth, J."

Now showing 1 - 20 of 26
  • Thumbnail Image
    Item
    An analysis of binary microlensing event OGLE-2015-BLG-0060
    (2019) Tsapras, Y.; Cassan, A.; Ranc, C.; Bachelet, E.; Street, R.; Udalski, A.; Hundertmark, M.; Bozza, V.; Beaulieu, J. P.; Rabus, Markus; Marquette, J. B.; Euteneuer, E.; Bramich, D. M.; Dominik, M.; Jaimes, R. F.; Horne, K.; Mao, S.; Menzies, J.; Schmidt, R.; Snodgrass, C.; Steele, I. A.; Wambsganss, J.; Mroz, P.; Szymanski, M. K.; Soszynski, I.; Skowron, J.; Pietrukowicz, Pawel; Kozlowski, S.; Poleski, R.; Ulaczyk, K.; Pawlak, M.; Jorgensen, U. G.; Skottfelt, J.; Popovas, A.; Ciceri, S.; Korhonen, H.; Kuffmeier, M.; Evans, D. F.; Peixinho, N.; Hinse, T. C.; Burgdorf, M. J.; Southworth, J.; Tronsgaard, R.; Kerins, E.; Andersen, M. I.; Rahvar, S.; Wang, Y.; Wertz, O.; Novati, S. C.; D'Ago, G.; Scarpetta, G.; Mancini, L.; Abe, F.; Asakura, Y.; Bennett, D. P.; Bhattacharya, A.; Donachie, M.; Evans, P.; Fukui, A.; Hirao, Y.; Itow, Y.; Kawasaki, K.; Koshimoto, N.; Li, M. C. A.; Ling, C. H.; Masuda, K.; Matsubara, Y.; Muraki, Y.; Miyazaki, S.; Nagakane, M.; Ohnishi, K.; Rattenbury, N.; Saito, T.; Sharan, A.; Shibai, H.; Sullivan, D. J.; Sumi, T.; Suzuki, D.; Tristram, P. J.; Yamada, T.; Yonehara, A.
  • Thumbnail Image
    Item
    An optical transmission spectrum of the transiting hot Jupiter in the metal-poor WASP-98 planetary system
    (2016) Mancini, L.; Giordano, M.; Molliere, P.; Southworth, J.; Brahm Scott, Rafael; Ciceri, S.; Henning, Th
  • No Thumbnail Available
    Item
    Digging deeper into the dense Galactic globular cluster Terzan 5 with electron-multiplying CCDs Variable star detection and new discoveries
    (2024) Jaimes, R. Figuera; Catelan, M.; Horne, K.; Skottfelt, J.; Snodgrass, C.; Dominik, M.; Jorgensen, U. G.; Southworth, J.; Hundertmark, M.; Longa-Pena, P.; Sajadian, S.; Tregolan-Reed, J.; Hinse, T. C.; Andersen, M. I.; Bonavita, M.; Bozza, V.; Burgdorf, M. J.; Haikala, L.; Khalouei, E.; Korhonen, H.; Peixinho, N.; Rabus, M.; Rahvar, S.
    Context. High frame-rate imaging was employed to mitigate the effects of atmospheric turbulence (seeing) in observations of globular cluster Terzan 5.
  • Thumbnail Image
    Item
    EMCCD photometry reveals two new variable stars in the crowded central region of the globular cluster NGC 6981 (Research Note)
    (2013) Skottfelt, J.; Rabus, Markus; Bramich, D.M.; Figuera Jaimes, R.; Jørgensen, U.G.; Kains, N.; Harpsøe, K.B.W.; Liebig, C.; Penny, M.T.; Alsubai, K.A.; Andersen, J.M.; Bozza, V.; Browne, P.; Calchi Novati, S.; Damerdji, Y.; Diehl, C.; Dominik, M.; Elyiv, A.; Giannini, E.; Hessman, F.; Hinse, T.C.; Hundertmark, M.; Juncher, D.; Kerins, E.; Korhonen, H.; Mancini, L.; Martin, R.; Rahvar, S.; Scarpetta, G.; Southworth, J.; Snodgrass, C.; Street, R.A.; Surdej, J.; Tregloan-Reed, J.; Vilela, C.; Williams, A.
  • Thumbnail Image
    Item
  • No Thumbnail Available
    Item
    High-precision photometry by telescope defocusing – VII. The ultrashort period planet WASP-103
    (2015) Southworth, J.; Mancini, L.; Ciceri, S.; Budaj, J.; Dominik, M.; Jaimes, R.; Haugbolle, T.; Jorgensen, U.; Popovas, A.; Rabus, Markus; Rahvar, S.; Von Essen, C.; Schmidt, R.; Wertz, O.; Bozza, V.; Novati, S.
  • Thumbnail Image
    Item
  • Thumbnail Image
    Item
    High-precision photometry by telescope defocussing – VIII. WASP-22, WASP-41, WASP-42 and WASP-55
    (2016) Southworth, J.; Tregloan, J.; Andersen, M.; Novati, S.; Ciceri, S.; Colque, J.; D'Ago, G.; Dominik, M.; Evans, D.; Rabus, Markus; Herrera, A.; Hinse, T.; Jorgensen, U.; Juncher, D.; Kuffmeier, M.; Gu, S.
  • Thumbnail Image
    Item
    High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP) I. Lucky imaging observations of 101 systems in the southern hemisphere
    (2016) Evans, D.; Southworth, J.; Maxted, P.; Skottfelt, J.; Hundertmark, M.; Jorgensen, U.; Dominik, M.; Alsubai, K.; Andersen, M.; Rabus, Markus; Burgdorf, M.; Ciceri, S.; Jaimes, R.; Gu, S.; Haugbolle, T.; Bozza, V.
  • Thumbnail Image
    Item
    High-resolution imaging of transiting extrasolar planetary systems (HITEP) II. Lucky imaging results from 2015 and 2016
    (2018) Evans, D. F.; Southworth, J.; Smalley, B.; Jørgensen, U.G.; Dominik, M.; Andersen, M.I.; Bozza, V.; Bramich, D.M.; Burgdorf, M.J.; Rabus, Markus
  • Thumbnail Image
    Item
    Kepler-539 : a young extrasolar system with two giant planets on wide orbits and in gravitational interaction
    (2016) Mancini, L.; Lillo, J.; Southworth, J.; Borsato, L.; Gandolfi, D.; Ciceri, S.; Barrado, D.; Brahm, R.; Henning, T.
  • No Thumbnail Available
    Item
    Larger and faster : revised properties and a shorter orbital period for the WASP-57 planetary system from a pro-am collaboration
    (2015) Southworth, J.; Mancini, L.; Tregloan-Reed, J.; Novati, S.; Ciceri, S.; D'Ago, G.; Delrez, L.; Dominik, M.; Evans, D.; Rabus, Markus; Jehin, E.; Jorgensen, U.; Haugbolle, T.; Lend, M.; Arena, C.; Gillon, M.
  • Thumbnail Image
    Item
    Orbital alignment and star-spot properties in the WASP-52 planetary system
    (OXFORD UNIV PRESS, 2017) Mancini, L.; Southworth, J.; Raia, G.; Tregloan Reed, J.; Molliere, P.; Bozza, V.; Bretton, M.; Bruni, I.; Ciceri, S.; D'Ago, G.; Dominik, M.; Hinse, T. C.; Hundertmark, M.; Jorgensen, U. G.; Korhonen, H.; Rabus, M.; Rahvar, S.; Starkey, D.; Novati, S. Calchi; Jaimes, R. Figuera; Henning, Th.; Juncher, D.; Haugbolle, T.; Kains, N.; Popovas, A.; Schmidt, R. W.; Skottfelt, J.; Snodgrass, C.; Surdej, J.; Wertz, O.
    We report 13 high-precision light curves of eight transits of the exoplanet WASP-52 b, obtained by using four medium-class telescopes, through different filters, and adopting the defocussing technique. One transit was recorded simultaneously from two different observatories and another one from the same site but with two different instruments, including a multiband camera. Anomalies were clearly detected in five light curves and modelled as star-spots occulted by the planet during the transit events. We fitted the clean light curves with the JKTEBOP code, and those with the anomalies with the PRISM + GEMC codes in order to simultaneously model the photometric parameters of the transits and the position, size and contrast of each star-spot. We used these new light curves and some from the literature to revise the physical properties of the WASP-52 system. Star-spots with similar characteristics were detected in four transits over a period of 43 d. In the hypothesis that we are dealing with the same star-spot, periodically occulted by the transiting planet, we estimated the projected orbital obliquity of WASP-52 b to be. = 3 degrees.8 +/- 8 degrees.4. We also determined the true orbital obliquity, psi = 20 degrees +/- 50 degrees, which is, although very uncertain, the first measurement of. purely from star-spot crossings. We finally assembled an optical transmission spectrum of the planet and searched for variations of its radius as a function of wavelength. Our analysis suggests a flat transmission spectrum within the experimental uncertainties.
  • Thumbnail Image
    Item
  • No Thumbnail Available
    Item
    PATHWAY TO THE GALACTIC DISTRIBUTION OF PLANETS: COMBINED SPITZER AND GROUND-BASED MICROLENS PARALLAX MEASUREMENTS OF 21 SINGLE-LENS EVENTS
    (2015) Novati, S. Calchi; Gould, A.; Udalski, A.; Menzies, J. W.; Bond, I. A.; Shvartzvald, Y.; Street, R. A.; Hundertmark, M.; Beichman, C. A.; Yee, J. C.; Carey, S.; Poleski, R.; Skowron, J.; Kozlowski, S.; Mroz, P.; Pietrukowicz, P.; Pietrzynski, G.; Szymanski, M. K.; Soszynski, I.; Ulaczyk, K.; Wyrzykowski, L.; Albrow, M.; Beaulieu, J. P.; Caldwell, J. A. R.; Cassan, A.; Coutures, C.; Danielski, C.; Prester, D. Dominis; Donatowicz, J.; Loncaric, K.; McDougall, A.; Morales, J. C.; Ranc, C.; Zhu, W.; Abe, F.; Barry, R. K.; Bennett, D. P.; Bhattacharya, A.; Fukunaga, D.; Inayama, K.; Koshimoto, N.; Namba, S.; Sumi, T.; Suzuki, D.; Tristram, P. J.; Wakiyama, Y.; Yonehara, A.; Maoz, D.; Kaspi, S.; Friedmann, M.; Bachelet, E.; Jaimes, R. Figuera; Bramich, D. M.; Tsapras, Y.; Horne, K.; Snodgrass, C.; Wambsganss, J.; Steele, I. A.; Kains, N.; Bozza, V.; Dominik, M.; Jorgensen, U. G.; Alsubai, K. A.; Ciceri, S.; D'Ago, G.; Haugbolle, T.; Hessman, F. V.; Hinse, T. C.; Juncher, D.; Korhonen, H.; Mancini, L.; Popovas, A.; Rabus, M.; Rahvar, S.; Scarpetta, G.; Schmidt, R. W.; Skottfelt, J.; Southworth, J.; Starkey, D.; Surdej, J.; Wertz, O.; Zarucki, M.; Gaudi, B. S.; Pogge, R. W.; De Poy, D. L.
    We present microlens parallax measurements for 21 (apparently) isolated lenses observed toward the Galactic bulge that were imaged simultaneously from Earth and Spitzer, which was similar to 1 AU west of Earth in projection. We combine these measurements with a kinematic model of the Galaxy to derive distance estimates for each lens, with error bars that are small compared to the Sun's galactocentric distance. The ensemble therefore yields a well-defined cumulative distribution of lens distances. In principle, it is possible to compare this distribution against a set of planets detected in the same experiment in order to measure the Galactic distribution of planets. Since these Spitzer observations yielded only one planet, this is not yet possible in practice. However, it will become possible as larger samples are accumulated.
  • Thumbnail Image
    Item
    Physical properties and transmission spectrum of the WASP-74 planetary system from multiband photometry
    (2019) Mancini, L.; Southworth, J.; Molliere, P.; Tregloan-Reed, J.; Juvan, I. G.; Chen, G.; Sarkis, P.; Bruni, I.; D’Ago, Giuseppe; Rabus, Markus; Ciceri, S.; Andersen, M. I.; Bozza, V.; Bramich, D. M.; Burgdorf, M.; Dominik, M.; Evans, D. F.; Jaimes, R. F.; Fossati, L.; Henning, T.; Hinse, T. C.; Hundertmark, M.; Jorgensen, U. G.; Kerins, E.; Korhonen, H.; Kuffmeier, M.; Longa, P.; Peixinho, N.; Popovas, A.; Rahvar, S.; Skottfelt, J.; Snodgrass, C.; Tronsgaard, R.; Wang, Y.; Wertz, O.
  • Thumbnail Image
    Item
    Physical properties and transmission spectrum of the WASP-80 planetary system from multi-colour photometry â
    (2014) Mancini, L.; Southworth, J.; Ciceri, S.; Dominik, M.; Henning, T.; Jørgensen, U.; Lanza, A.; Rabus, Markus
  • Thumbnail Image
    Item
    Physical properties of the planetary systemsWASP-45 and WASP-46 from simultaneous multiband photometry
    (2016) Ciceri, S.; Mancini, L.; Southworth, J.; Lendl, M.; Tregloan Reed, J.; Brahm, R.; Chen, G.; D'Ago, G.; Rabus, Markus; Jordán Colzani, Andrés Cristóbal
  • No Thumbnail Available
    Item
    Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035
    (2022) Herald, A.; Udalski, A.; Bozza, V.; Rota, P.; Bond, I. A.; Yee, J. C.; Sajadian, S.; Mroz, P.; Poleski, R.; Skowron, J.; Szymanski, M. K.; Soszynski, I.; Pietrukowicz, P.; Kozlowski, S.; Ulaczyk, K.; Rybicki, K. A.; Iwanek, P.; Wrona, M.; Gromadzki, M.; Abe, F.; Barry, R.; Bennett, D. P.; Bhattacharya, A.; Fukui, A.; Fujii, H.; Hirao, Y.; Itow, Y.; Kirikawa, R.; Kondo, I.; Koshimoto, N.; Matsubara, Y.; Matsumoto, S.; Miyazaki, S.; Muraki, Y.; Olmschenk, G.; Ranc, C.; Okamura, A.; Rattenbury, N. J.; Satoh, Y.; Sumi, T.; Suzuki, D.; Silva, S. Ishitani; Toda, T.; Tristram, P. J.; Vandorou, A.; Yama, H.; Beichman, C. A.; Bryden, G.; Novati, S. Calchi; Carey, S.; Gaudi, B. S.; Gould, A.; Henderson, C. B.; Johnson, S.; Shvartzvald, Y.; Zhu, W.; Dominik, M.; Hundertmark, M.; Jorgensen, U. G.; Longa-Pena, P.; Skottfelt, J.; Tregloan-Reed, J.; Bach-Moller, N.; Burgdorf, M.; D'Ago, G.; Haikala, L.; Hitchcock, J.; Khalouei, E.; Peixinho, N.; Rahvar, S.; Snodgrass, C.; Southworth, J.; Spyratos, P.; Zang, W.; Yang, H.; Mao, S.; Bachelet, E.; Maoz, D.; Street, R. A.; Tsapras, Y.; Christie, G. W.; Cooper, T.; de Almeida, L.; do Nascimento, J. -D., Jr.; Green, J.; Han, C.; Hennerley, S.; Marmont, A.; McCormick, J.; Monard, L. A. G.; Natusch, T.; Pogge, R.
    Context. Brown dwarfs are transition objects between stars and planets that are still poorly understood, for which several competing mechanisms have been proposed to describe their formation. Mass measurements are generally difficult to carry out for isolated objects as well as for brown dwarfs orbiting low-mass stars, which are often too faint for a spectroscopic follow-up.
  • Thumbnail Image
    Item
    Rotation periods and astrometric motions of the Luhman 16AB brown dwarfs by high-resolution lucky-imaging monitoring
    (2015) Mancini, L.; Giacobbe, P.; Littlefair, S. P.; Southworth, J.; Bozza, V.; Damasso, M.; Dominik, M.; Hundertmark, M.; Jorgensen, U. G.; Rabus, Markus