Many new variable stars discovered in the core of the globular cluster NGC 6715 (M54) with EMCCD observations

Autor: Jaimes, R. Figuera, Bramich, D. M., Kains, N., Skottfelt, J., Jørgensen, U. G., Horne, K., Dominik, M., Alsubai, K. A., Bozza, V., Burgdorf, M. J., Novati, S. Calchi, Ciceri, S., D'Ago, G., Evans, D. F., Galianni, P., Gu, S. H., Harpsøe, K. B. W, Haugbølle, T., Hinse, T. C., Hundertmark, M., Juncher, D., Kerins, E., Korhonen, H., Kuffmeier, M., Mancini, L., Peixinho, N., Popovas, A., Rabus, M., Rahvar, S., Scarpetta, G., Schmidt, R. W., Snodgrass, C., Southworth, J., Starkey, D., Street, R. A., Surdej, J., Tronsgaard, R., Unda-Sanzana, E., von Essen, C., Wang, X. -B., Wertz, O.

Publikováno v: A&A 592, A120 (2016)

We show the benefits of using Electron-Multiplying CCDs and the shift-and-add technique as a tool to minimise the effects of the atmospheric turbulence such as blending between stars in crowded fields and to avoid saturated stars in the fields observ

Externí odkaz: http://arxiv.org/abs/1605.06141

Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multi-band photometry

Autor: Ciceri, S., Mancini, L., Southworth, J., Lendl, M., Tregloan-Reed, J., Brahm, R., Chen, G., D'Ago, G., Dominik, M., Jaimes, R. Figuera, Galianni, P., Harpsøe, K., Hinse, T. C., Jørgensen, U. G., Juncher, D., Korhonen, H., Liebig, C., Rabus, M., Bonomo, A. S., Bott, K., Henning, Th., Jordan, A., Sozzetti, A., Alsubai, K. A., Andersen, J. M., Bajek, D., Bozza, V., Bramich, D. M., Browne, P., Novati, S. Calchi, Damerdji, Y., Diehl, C., Elyiv, A., Giannini, E., Gu, S-H., Hundertmark, M., Kains, N., Penny, M., Popovas, A., Rahvar, S., Scarpetta, G., Schmidt, R. W., Skottfelt, J., Snodgrass, C., Surdej, J., Vilela, C., Wang, X-B., Wertz, O.

Accurate measurements of the physical characteristics of a large number of exoplanets are useful to strongly constrain theoretical models of planet formation and evolution, which lead to the large variety of exoplanets and planetary-system configurat

Externí odkaz: http://arxiv.org/abs/1511.05171

Red noise versus planetary interpretations in the microlensing event OGLE-2013-BLG-446

Autor: Bachelet, E., Bramich, D. M., Han, C., Greenhill, J., Street, R. A., Gould, A., Ago, G. D, AlSubai, K., Dominik, M., Jaimes, R. Figuera, Horne, K., Hundertmark, M., Kains, N., Snodgrass, C., Steele, I. A., Tsapras, Y., Albrow, M. D., Batista, V., Beaulieu, J. -P., Bennett, D. P., Brillant, S., Caldwell, J. A. R., Cassan, A., Cole, A., Coutures, C., Dieters, S., Prester, D. Dominis, Donatowicz, J., Fouque, P., Hill, K., Marquette, J. -B., Menzies, J., Pere, C., Ranc, C., Wambsganss, J., Warren, D., de Almeida, L. Andrade, Choi, J. -Y., DePoy, D. L., Dong, Subo, Hung, L. -W., Hwang, K. H., Jablonski, F., Jung, Y. K., Kaspi, S., Klein, N., Lee, C. -U., Maoz, D., Munoz, J. A., Nataf, D., Park, H., Pogge, R. W., Polishook, D., Shin, I. -G., Shporer, A., Abe, J. C. Yee F., Bhattacharya, A., Bond, I. A., Botzler, C. S., Freeman, M., Fukui, A., Itow, Y., Koshimoto, N., Ling, C. H., Masuda, K., Matsubara, Y., Muraki, Y., Ohnishi, K., Philpott, L. C., Rattenbury, N., Saito, To., Sullivan, D. J., Sumi, T., Suzuki, D., Tristram, J., Yonehara, A., Bozza, V., Novati, S. Calchi, Ciceri, S., Galianni, P., Gu, S. H., Harpsoe, K., Hinse, T. C., Jorgensen, U. G., Juncher, D., Korhonen, H., Mancini, L., Melchiorre, C., Popovas, A., Postiglione, A., Rabus, M., Rahvar, S., Schmidt, R. W., Scarpetta, G., Skottfelt, J., Southworth, John, Stabile, An., Surdej, J., Wang, X. -B., Wertz, O.

For all exoplanet candidates, the reliability of a claimed detection needs to be assessed through a careful study of systematic errors in the data to minimize the false positives rate. We present a method to investigate such systematics in microlensi

Externí odkaz: http://arxiv.org/abs/1510.02724

Spitzer Space Telescope Measurements of Dust Reverberation Lags in the Seyfert 1 Galaxy NGC 6418

Autor: Vazquez, Billy, Galianni, Pasquale, Richmond, Michael, Robinson, Andrew, Axon, David J., Horne, Keith, Almeyda, Triana, Fausnaugh, Michael, Peterson, Bradley M., Bottorff, Mark, Gallimore, Jack, Eltizur, Moshe, Netzer, Hagai, Storchi-Bergmann, Thaisa, Marconi, Alessandro, Capetti, Alessandro, Batcheldor, Dan, Buchanan, Catherine, Stirpe, Giovanna, Kishimoto, Makoto, Packham, Christopher, Perez, Enrique, Tadhunter, Clive, Upton, John, Estrada-Carpenter, Vicente

We present results from a fifteen-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 dusty torus in this

Externí odkaz: http://arxiv.org/abs/1502.01977

High-precision photometry by telescope defocussing. VI. WASP-24, WASP-25 and WASP-26

Autor: Southworth, John, Hinse, T. C., Burgdorf, M., Novati, S. Calchi, Dominik, M., Galianni, P., Gerner, T., Giannini, E., Gu, S. -H., Hundertmark, M., Jorgensen, U. G., Juncher, D., Kerins, E., Mancini, L., Rabus, M., Ricci, D., Schaefer, S., Skottfelt, J., Tregloan-Reed, J., Wang, X. -B., Wertz, O., Alsubai, K. A., Andersen, J. M., Bozza, V., Bramich, D. M., Browne, P., Ciceri, S., D'Ago, G., Damerdji, Y., Diehl, C., Dodds, P., Elyiv, A., Fang, X. -S., Finet, F., Jaimes, R. Figuera, Hardis, S., Harpsoe, K., Jessen-Hansen, J., Kains, N., Kjeldsen, H., Korhonen, H., Liebig, C., Lund, M. N., Lundkvist, M., Mathiasen, M., Penny, M. T., Popovas, A., Proft, S., Rahvar, S., Sahu, K., Scarpetta, G., Schmidt, R. W., Schoenebeck, F., Snodgrass, C., Street, R. A., Surdej, J., Tsapras, Y., Vilela, C.

We present time-series photometric observations of thirteen transits in the planetary systems WASP-24, WASP-25 and WASP-26. All three systems have orbital obliquity measurements, WASP-24 and WASP-26 have been observed with Spitzer, and WASP-25 was pr

Externí odkaz: http://arxiv.org/abs/1407.6253