A CCD Search for Variable Stars in the Open Cluster NGC 6611

Autor: Michalska, G., Kołaczkowski, Z., Leiton, R., Szewczyk, O., Kinemuchi, K., Kalari, M.

We present the results of the $UBVI_C$ variability survey in the young open cluster NGC 6611 based on observations obtained during 34 nights spanning one year. In total, we found 95 variable stars. Most of these stars are classified as periodic and i

Externí odkaz: http://arxiv.org/abs/2302.03628

OGLE-2009-BLG-023/MOA-2009-BLG-028: Characterization of a Binary Microlensing Event Based on Survey Data

Autor: Hwang, K. -H., Han, C., Udalski, A., Sumi, T., Gould, A., Jaroszynski, M., Kubiak, M., Szymanski, M. K., Pietrzynski, G., Soszynski, I., Szewczyk, O., Ulaczyk, K., Wyrzykowski, L., Abe, F., Bennett, D. P., Bond, I. A., Botzler, C. S., Freeman, M., Fukui, A., Furusawa, K., Hearnshaw, J. B., Itow, Y., Kamiya, K., Kilmartin, P. M., Korpela, A., Lin, W., Ling, C. H., Masuda, K., Matsubara, Y., Miyake, N., Muraki, Y., Ohnishi, K., Perrott, Y. C., Rattenbury, N. J., Saito, To., Sako, T., Sullivan, D. J., Sweatman, W. L., Tristram, P. J., Yock, P. C. M.

We report the result of the analysis of the light curve of a caustic-crossing binary-lens microlensing event OGLE-2009-BLG-023/MOA-2009-BLG-028. Even though the event was observed solely by survey experiments, we could uniquely determine the mass of

Externí odkaz: http://arxiv.org/abs/1104.5091

OGLE-2009-BLG-092/MOA-2009-BLG-137: A Dramatic Repeating Event With the Second Perturbation Predicted by Real-Time Analysis

Autor: Ryu, Y. -H., Han, C., Hwang, K. -H., Street, R., Udalski, A., Sumi, T., Fukui, A., Beaulieu, J. -P., Gould, A., Dominik, M., Abe, F., Bennett, D. P., Bond, I. A., Botzler, C. S., Furusawa, K., Hayashi, F., Hearnshaw, J. B., Hosaka, S., Itow, Y., Kamiya, K., Kilmartin, P. M., Korpela, A., Lin, W., Ling, C. H., Makita, S., Masuda, K., Matsubara, Y., Miyake, N., Muraki, Y., Nishimoto, K., Ohnishi, K., Perrott, Y. C., Rattenbury, N., Saito, To., Skuljan, L., Sullivan, D. J., Suzuki, D., Sweatman, W. L., Tristram, P. J., Wada, K., Yock, P. C. M., Szymański, M. K., Kubiak, M., Pietrzyński, G., Soszyński, I., Szewczyk, O., Wyrzykowski, Ł., Ulaczyk, K., Bos, M., Christie, G. W., Depoy, D. L., Gal-Yam, A., Gaudi, B. S., Kaspi, S., Lee, C. -U., Maoz, D., McCormick, J., Monard, B., Moorhouse, D., Pogge, R. W., Polishook, D., Shvartzvald, Y., Shporer, A., Thornley, G., Yee, J. C., Albrow, M. D., Batista, V., Brillant, S., Cassan, A., Cole, A., Corrales, E., Coutures, Ch., Dieters, S., Fouqué, P., Greenhill, J., Menzies, J., Allan, A., Bramich, D. M., Browne, P., Horne, K., Kains, N., Snodgrass, C., Steele, I., Tsapras, Y., Bozza, V., Burgdorf, M. J., Novati, S. Calchi, Dreizler, S., Finet, F., Glitrup, M., Grundahl, F., Harpsøe, K., Hessman, F. V., Hinse, T. C., Hundertmark, M., Jørgensen, U. G., Liebig, C., Maier, G., Mancini, L., Mathiasen, M., Rahvar, S., Ricci, D., Scarpetta, G., Skottfelt, J., Surdej, J., Southworth, J., Wambsganss, J., Zimmer, F.

We report the result of the analysis of a dramatic repeating gravitational microlensing event OGLE-2009-BLG-092/MOA-2009-BLG-137, for which the light curve is characterized by two distinct peaks with perturbations near both peaks. We find that the ev

Externí odkaz: http://arxiv.org/abs/1009.0338

The Araucaria Project. First Cepheid Distance to the Sculptor Group Galaxy NGC 7793 from Variables discovered in a Wide-Field Imaging Survey

Autor: Pietrzynski, G., Gieren, W., Hamuy, M., Pignata, G., Soszynski, I., Udalski, A., Walker, A., Fouque, P., Bresolin, F., Kudritzki, R. P., Garcia-Varela, A., Szewczyk, O., Szymanski, M., Kubiak, M., Wyrzykowski, L.

We have detected, for the first time, Cepheid variables in the Sculptor Group spiral galaxy NGC 7793. From wide-field images obtained in the optical V and I bands on 56 nights in 2003-2005, we have discovered 17 long-period (24-62 days) Cepheids whos

Externí odkaz: http://arxiv.org/abs/1008.3040

OGLE 2008--BLG--290: An accurate measurement of the limb darkening of a Galactic Bulge K Giant spatially resolved by microlensing

Autor: Fouque, P., Heyrovsky, D., Dong, S., Gould, A., Udalski, A., Albrow, M. D., Batista, V., Beaulieu, J. -P., Bennett, D. P., Bond, I. A., Bramich, D. M., Novati, S. Calchi, Cassan, A., Coutures, C., Dieters, S., Dominik, M., Prester, D. Dominis, Greenhill, J., Horne, K., Jorgensen, U. G., Kozlowski, S., Kubas, D., Lee, C. -H., Marquette, J. -B., Mathiasen, M., Menzies, J., Monard, L. A. G., Nishiyama, S., Papadakis, I., Street, R., Sumi, T., Williams, A., Yee, J. C., Brillant, S., Caldwell, J. A. R., Cole, A., Cook, K. H., Donatowicz, J., Kains, N., Kane, S. R., Martin, R., Pollard, K. R., Sahu, K. C., Tsapras, Y., Wambsganss, J., Zub, M., DePoy, D. L., Gaudi, B. S., Han, C., Lee, C. -U., Park, B. -G., Pogge, R. W., Kubiak, M., Szymanski, M. K., Pietrzynski, G., Soszynski, I., Szewczyk, O., Ulaczyk, K., Wyrzykowski, L., Abe, F., Fukui, A., Furusawa, K., Gilmore, A. C., Hearnshaw, J. B., Itow, Y., Kamiya, K., Kilmartin, P. M., Korpela, A. V., Lin, W., Ling, C. H., Masuda, K., Matsubara, Y., Miyake, N., Muraki, Y., Nagaya, M., Ohnishi, K., Okumura, T., Perrott, Y., Rattenbury, N. J., Saito, To., Sako, T., Sato, S., Skuljan, L., Sullivan, D., Sweatman, W., Tristram, P. J., Yock, P. C. M., Allan, A., Bode, M. F., Burgdorf, M. J., Clay, N., Fraser, S. N., Hawkins, E., Kerins, E., Lister, T. A., Mottram, C. J., Saunders, E. S., Snodgrass, C., Steele, I. A., Wheatley, P. J., Anguita, T., Bozza, V., Harpsoe, K., Hinse, T. C., Hundertmark, M., Kjaergaard, P., Liebig, C., Mancini, L., Masi, G., Rahvar, S., Ricci, D., Scarpetta, G., Southworth, J., Surdej, J., Thone, C. C., Riffeser, A., Seitz, S., Bender, R.

Gravitational microlensing is not only a successful tool for discovering distant exoplanets, but it also enables characterization of the lens and source stars involved in the lensing event. In high magnification events, the lens caustic may cross ove

Externí odkaz: http://arxiv.org/abs/1005.0966