Browsing by Author "Pietrukowicz, Pawel"

Now showing 1 - 18 of 18
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    A New Lower Main Sequence Eclipsing Binary with Detached Components
    (2009) Rozyczka, M.; Pietrukowicz, Pawel; Catelan, Márcio
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    A search for dormant binaries with degenerate components in omega Centauri and NGC 6397
    (2010) Rozyczka, M.; Pietrukowicz, Pawel; Catelan, Márcio
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    A VIMOS spectroscopy study of photometric variables and straggler candidates in omega Centauri
    (2012) Rozyczka, M.; Pietrukowicz, Pawel; Catelan, Márcio
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    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.
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    Characterization of Extrasolar Planetary Transiting Candidates II. The Companions to Late M-type stars
    (2010) Gallardo, J.; Ramírez Alegría, Sebastián A.; Minniti, D.; Pietrukowicz, Pawel; Gallardo, J.; Ramírez Alegría, Sebastián A.; Minniti, D.; Pietrukowicz, Pawel
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    Deep census of variable stars in a VLT/VIMOS field in Carina
    (2009) Pietrukowicz, Pawel; Minniti, D.; Zoccali, Manuela; Hempel, Maren; Pietrukowicz, Pawel; Minniti, D.; Zoccali, Manuela; Hempel, Maren
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    OGLE-2013-BLG-0911Lb : A Secondary on the Brown-dwarf Planet Boundary around an M Dwarf
    (2020) Miyazaki, S; Sumi, T; Bennett, DP; Udalski, A; Shvartzvald, Y; Street, R; Bozza, V; Yee, JC; Rabus, Markus; D'Ago, Giuseppe; Bond, IA; Rattenbury, N; Koshimoto, N; Suzuki, D; Fukui, A; Abe, F; Bhattacharya, A; Barry, R; Donachie, M; Fujii, H; Hirao, Y; Itow, Y; Kamei, Y; Kondo, I; Li, MCA; Ling, CH; Matsubara, Y; Matsuo, T; Muraki, Y; Nagakane, M; Ohnishi, K; Ranc, C; Saito, T; Sharan, A; Shibai, H; Suematsu, H; Sullivan, DJ; Tristram, PJ; Yamakawa, T; Yonehara, A; Skowron, J; Poleski, R; Mroz, P; Szymanski, MK; Soszynski, I; Pietrukowicz, Pawel; KozLowski, S; Ulaczyk, K; Wyrzykowski, L; Friedmann, M; Kaspi, S; Maoz, D; Albrow, M; Christie, G; DePoy, DL; Gal-Yam, A; Gould, A; Lee, CU; Manulis, I; McCormick, J; Natusch, T; Ngan, H; Pogge, RW; Porritt, I; Tsapras, Y; Bachelet, E; Hundertmark, MPG; Dominik, M; Bramich, DM; Cassan, A; Jaimes, RF; Horne, K; Schmidt, R; Snodgrass, C; Wambsganss, J; Steele, IA; Menzies, J; Mao, S; Jorgensen, UG; Burgdorf, MJ; Ciceri, S; Novati, SC; Evans, DF; Hinse, TC; Kains, N; Kerins, E; Korhonen, H; Mancini, L; Popovas, A; Rahvar, S; Scarpetta, G; Skottfelt, J; Southworth, J; Peixinho, N; Verma, P
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    OGLE-2017-BLG-0329L : a microlensing binary characterized with dramatically enhanced precision using data from space-based observations
    (2018) Han, C.; Calchi Novati, S.; Udalski, A.; Lee, C.U.; Gould, A.; Bozza, V.; Mróz, P.; Pietrukowicz, Pawel; Skowron, J.; Rabus, Markus
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    OGLE-2017-BLG-0406 : Spitzer Microlens Parallax Reveals Saturn-mass Planet Orbiting M-dwarf Host in the Inner Galactic Disk
    (2020) Hirao, Y.; Bennett, D. P.; Ryu, Y. H.; Koshimoto, N.; Udalski, A.; Yee, J. C.; Sumi, T.; Bond, I. A.; Shvartzvald, Y.; Rabus, Markus; Abe, F.; Barry, R. K.; Bhattacharya, A.; Donachie, M.; Fukui, A.; Itow, Y.; Kondo, I.; Alex Li, M. C.; Matsubara, Y.; Matsuo, T.; Miyazaki, S.; Muraki, Y.; Nagakane, M.; Ranc, C.; Rattenbury, N. J.; Suematsu, H.; Shibai, H.; Suzuki, D.; Tristram, P. J.; Yonehara, A.; Skowron, J.; Poleski, R.; Mróz, P.; Szymański, M. K.; Soszyński, I.; Kozłowski, S.; Pietrukowicz, Pawel; Ulaczyk, K.; Rybicki, K.; Iwanek, P. D.; Albrow, M.; Chung, S. J.; Gould, A.; Han, C.; Hwang, K. H.; Jung, Y. K.; Shin, I. G.; Zang, W.; Cha, S. M.; Kim, D. J.
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    OGLE-2019-BLG-0825: Constraints on the Source System and Effect on Binary-lens Parameters Arising from a Five-day Xallarap Effect in a Candidate Planetary Microlensing Event
    (2023) Satoh, Yuki; Koshimoto, Naoki; Bennett, David A.; Sumi, Takahiro; Rattenbury, Nicholas; Suzuki, Daisuke; Miyazaki, Shota; Bond, Ian; Udalski, Andrzej; Gould, Andrew; Bozza, Valerio; Dominik, Martin; Hirao, Yuki; Kondo, Iona; Kirikawa, Rintaro; Hamada, Ryusei; Abe, Fumio; Barry, Richard; Bhattacharya, Aparna; Fujii, Hirosane; Fukui, Akihiko; Fujita, Katsuki; Ikeno, Tomoya; Ishitani Silva, Stela; Itow, Yoshitaka; Matsubara, Yutaka; Matsumoto, Sho; Muraki, Yasushi; Niwa, Kosuke; Okamura, Arisa J.; Olmschenk, Greg; Ranc, Clement; Toda, Taiga; Tomoyoshi, Mio; Tristram, Paul; Vandorou, Aikaterini; Yama, Hibiki; Yamashita, Kansuke; Mroz, Przemek; Poleski, Radoslaw; Skowron, Jan; Szymanski, Michal K.; Poleski, Radek A.; Soszynski, Igor; Pietrukowicz, Pawel; Kozlowski, Szymon; Ulaczyk, Krzysztof D.; Rybicki, Krzysztof; Iwanek, Patryk; Wrona, Marcin; Gromadzki, Mariusz; Albrow, Michael; Chung, Sun-Ju; Han, Cheongho; Hwang, Kyu-Ha; Kim, Doeon; Jung, Youn Kil; Kim, Hyoun Woo C.; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi; Yang, Hongjing; Yee, Jennifer; Zang, Weicheng; Cha, Sang-Mok; Kim, Dong-Jin; Kim, Seung-Lee W.; Lee, Chung-Uk G.; Lee, Dong-Joo; Lee, Yongseok; Park, Byeong-Gon; Pogge, Richard; Jorgensen, Uffe; Longa-Pena, Penelope; Sajadian, Sedighe; Skottfelt, Jesper; Snodgrass, Colin; Tregloan-Reed, Jeremy; Bach-Moller, Nanna; Burgdorf, Martin; D'Ago, Giuseppe; Haikala, Lauri; Hitchcock, James; Hundertmark, Markus; Khalouei, Elahe; Peixinho, Nuno; Rahvar, Sohrab; Southworth, John; Spyratos, Petros
    We present an analysis of microlensing event OGLE-2019-BLG-0825. This event was identified as a planetary candidate by preliminary modeling. We find that significant residuals from the best-fit static binary-lens model exist and a xallarap effect can fit the residuals very well and significantly improves chi (2) values. On the other hand, by including the xallarap effect in our models, we find that binary-lens parameters such as mass ratio, q, and separation, s, cannot be constrained well. However, we also find that the parameters for the source system such as the orbital period and semimajor axis are consistent between all the models we analyzed. We therefore constrain the properties of the source system better than the properties of the lens system. The source system comprises a G-type main-sequence star orbited by a brown dwarf with a period of P similar to 5 days. This analysis is the first to demonstrate that the xallarap effect does affect binary-lens parameters in planetary events. It would not be common for the presence or absence of the xallarap effect to affect lens parameters in events with long orbital periods of the source system or events with transits to caustics, but in other cases, such as this event, the xallarap effect can affect binary-lens parameters.
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    Symbiotic stars in OGLE data - I. Large magellanic cloud systems
    (2014) Angeloni, Rodolfo; Ferreira Lopes, C.E.; Masetti, N.; Di Mille, F.; Pietrukowicz, Pawel; Udalski, A.; Navarrete Silva, Camila Andrea; Puzia, Thomas H.; Catelan, Márcio; Guzmán Carmine, Christian Dani; Schaefer, B. E.; Parisi, P.; Landi, R.
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    The first confirmed microlens in a globular cluster
    (2012) Pietrukowicz, Pawel; Minniti, D.; Pietrukowicz, Pawel; Minniti, D.
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    Variability and stellar populations with deep optical-IR images of the Milky Way disc: matching VVV with VLT/VIMOS data
    (2011) Pietrukowicz, Pawel; Minniti, D.; Hempel, Maren; Pietrukowicz, Pawel; Minniti, D.; Hempel, Maren
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    VISTA variable survey in the Milky Way
    (2010) Hempel, Maren; Minniti, D.; Kalbusch Saito, Roberto; Pietrukowicz, Pawel; Hempel, Maren; Minniti, D.; Kalbusch Saito, Roberto; Pietrukowicz, Pawel