Bennett, D. P., Rhie, S. H., Nikolaev, S., Gaudi, B. S., Udalski, A., Gould, A., ...
We present a new analysis of the Jupiter+Saturn analog system, OGLE-2006-BLG-109Lb,c, which was the first double planet system discovered with the gravitational microlensing method. This is the only...
Rest, A., Foley, R. J., Gezari, S., Narayan, G., Draine, B., Olsen, K., ...
We report the discovery of a supernova (SN) with the highest apparent energy output to date and conclude that it represents an extreme example of the Type IIn subclass. The SN, which was discovered...
Pietrukowicz, P., Minniti, D., Diaz, R. F., Fernandez, J. M., Zoccali, M., Gieren, W., ...
We used VLT/VIMOS images in the V band to obtain light curves of extrasolar planetary transits OGLE-TR-111 and OGLE-TR-113, and candidate planetary transits: OGLE-TR-82, OGLE-TR-86, OGLE-TR-91,...
Soszynski, I., Udalski, A., Szymanski, M. K., Kubiak, M., Pietrzynski, G., Wyrzykowski, L., ...
The fourth part of the OGLE-III Catalog of Variable Stars presents 91 995 long-period variables (LPVs) in the Large Magellanic Cloud (LMC). This sample consists of 79 200 OGLE Small Amplitude Red...
Kozlowski, Szymon, Kochanek, Christopher S., Udalski, A., Wyrzykowski, L., Soszynski, I., Szymanski, M. K., ...
Robust fast methods to classify variable light curves in large sky surveys are becoming increasingly important. While it is relatively straightforward to identify common periodic stars and particular...
Nardetto, N., Gieren, W., Kervella, P., Fouque, P., Storm, J., Pietrzynski, G., ...
The cross correlation method (hereafter CC) is widely used to derive the radial velocity curve of Cepheids when the signal to noise of the spectra is low. However, if it is used with the wrong...
Deep census of variable stars in a VLT/VIMOS field in Carina (2009)
Pietrukowicz, P., Minniti, D., Fernandez, J. M., Pietrzynski, G., Ruiz, M. T., Gieren, W., ...
We have searched for variable stars in deep V-band images of a field towards the Galactic plane in Carina. The images were taken with VIMOS instrument at ESO VLT during 4 contiguous nights in April...
Gieren, W., Pietrzynski, G., Soszynski, I., Szewczyk, O., Bresolin, F., ...
We have obtained deep near-infrared images in J and K filters of four fields in the Sculptor Group spiral galaxy NGC 247 with the ESO VLT and ISAAC camera. For a sample of ten Cepheids in these...
Wyrzykowski, L., Kozlowski, S., Skowron, J., Belokurov, V., Smith, M. C., Udalski, A., ...
We present the results from the OGLE-II survey (1996-2000) towards the Large Magellanic Cloud (LMC), which has the aim of detecting the microlensing phenomena caused by dark matter compact objects in...
High Cadence Near Infrared Timing Observations of Extrasolar Planets: I. GJ 436b and XO-1b (2009)
Caceres, C., Ivanov, V. D., Minniti, D., Naef, D., Melo, C., Mason, E., ...
Currently the only technique sensitive to Earth mass planets around nearby stars (that are too close for microlensing) is the monitoring of the transit time variations of the transiting extrasolar...
Soszynski, I., Udalski, A., Szymanski, M. K., Kubiak, M., Pietrzynski, G., Wyrzykowski, L., ...
The third part of the OGLE-III Catalog of Variable Stars comprises 24906 RR Lyr stars in the Large Magellanic Cloud (LMC). This sample consists of 17693 fundamental-mode (RRab), 4958 first-overtone...
Pietrzynski, G., Thompson, I., Graczyk, D., Gieren, W., Udalski, A., Szewczyk, O., ...
We have analyzed the double-lined eclipsing binary system OGLE-051019.64-685812.3 in the LMC which consists of two G4 giant components with very similar effective temperatures. A detailed analysis of...
Udalski, A., Soszynski, I., Szymanski, M. K., Kubiak, M., Pietrzynski, G., Wyrzykowski, L., ...
We present OGLE-III Photometric Maps of the Small Magellanic Cloud. They contain precise, calibrated VI photometry of about 6.2 million stars from 41 OGLE-III fields in the SMC observed regularly in...
A systematic fitting scheme for caustic-crossing microlensing events (2009)
Kains, N., Cassan, A., Horne, K., Albrow, M. D., Dieters, S., Fouque, P., ...
We outline a method for fitting binary-lens caustic-crossing microlensing events based on the alternative model parameterisation proposed and detailed in Cassan (2008). As an illustration of our...
OGLE-2005-BLG-071Lb, the Most Massive M Dwarf Planetary Companion? (2009)
Christie, G.W., Gaudi, B.S., Kubiak, M., Szymanski, M.K., Pietrzynski, G., Soszynski, I., ...
We combine all available information to constrain the nature of OGLE-2005-BLG-071Lb, the second planet discovered by microlensing and the first in a high-magnification event. These include...
OGLE-2005-BLG-071Lb, The Most Massive M Dwarf Planetary Companion? (2009)
Dong, S, Gould, A, Udalski, A, Anderson, J, Christie, GW, Gaudi, BS, ...
We combine all available information to constrain the nature of OGLE-2005-BLG-071Lb, the second planet discovered by microlensing and the first in a high-magnification event. These include...
A systematic fitting scheme for caustic-crossing microlensing events (2009)
Kains, N, Cassan, A, Horne, K, Albrow, MD, Dieters, S, Fouque, P, ...
We outline a method for fitting binary-lens caustic-crossing microlensing events based on the alternative model parametrization proposed and detailed by Cassan. As an illustration of our methodology,...
Yee, JC, Udalski, A, Sumi, T, Dong, S, Kozlowski, S, Bird, JC, ...
We analyze the extreme high-magnification microlensing event OGLE-2008-BLG-279, which peaked at a maximum magnification of A ~ 1600 on 2008 May 30. The peak of this event exhibits both finite-source...
Han, C, Hwang, KH, Kim, D, Udalski, A, Abe, F, Monard, LAB, ...
To improve the planet detection efficiency, current planetary microlensing experiments are focused on high magnificationevents searching for planetary signals near the peak of lensing light curves....
Soszynski, I., Udalski, A., Szymanski, M. K., Kubiak, M., Pietrzynski, G., Wyrzykowski, L., ...
In the second part of the OGLE-III Catalog of Variable Stars (OIII-CVS) we present 197 type II Cepheids and 83 anomalous Cepheids in the Large Magellanic Cloud (LMC). The sample of type II Cepheids...
Dong, Subo, Bond, I. A., Gould, A., Kozlowski, Szymon, Miyake, N., Gaudi, B. S., ...
We report the detection of the cool, Jovian-mass planet MOA-2007-BLG-400Lb. The planet was detected in a high-magnification microlensing event (with peak magnification A_max = 628) in which the...
Garcia-Varela, A., Pietrzynski, G., Gieren, W., Udalski, A., Soszynski, I., Walker, A., ...
We report on the discovery of a Cepheid population in the Sculptor Group spiral galaxy NGC 247 for the first time. On the basis of wide-field images collected in photometric surveys in V and I bands...
Soszynski, I., Poleski, R., Udalski, A., Szymanski, M. K., Kubiak, M., Pietrzynski, G., ...
We present the first part of a new catalog of variable stars (OIII-CVS) compiled from the data collected in the course of the third phase of the Optical Gravitational Lensing Experiment (OGLE-III)....
A transiting planet among 23 new near-threshold candidates from the OGLE survey - OGLE-TR-182 (2008)
Pont, F, Tamuz, O, Udalski, A, Mazeh, T, Bouchy, F, Melo, C, ...
By re-processing the data of the second season of the OGLE survey for planetary transits and adding new mesurements on the same fields gathered in subsequent years with the OGLE telescope, we have...
Soszynski, I., Poleski, R., Udalski, A., Kubiak, M., Szymanski, M. K., Pietrzynski, G., ...
We report the discovery of three new triple-mode classical Cepheids in the Large Magellanic Cloud, two of them with the fundamental, first overtone and second overtone excited, and one pulsating...
Udalski, A., Soszynski, I., Szymanski, M. K., Kubiak, M., Pietrzynski, G., Wyrzykowski, L., ...
We present the OGLE-III Photometric Maps of the Large Magellanic Cloud. They cover about 40 square degrees of the LMC and contain mean, calibrated VI photometry and astrometry of about 35 million...
Bennett, D. P., Bond, I. A., Udalski, A., Sumi, T., Abe, F., Fukui, A., ...
We report the detection of an extrasolar planet of mass ratio q ~ 2 x 10^(-4) in microlensing event MOA-2007-BLG-192. The best fit microlensing model shows both the microlensing parallax and finite...
Urbaneja, M. A., Bresolin, F., Przybilla, N., Gieren, W., Pietrzynski, G.
The quantitative analysis of low resolution spectra of A and B supergiants is used to determine a distance modulus of 24.99 +/- 0.10 mag (995 +/- 46 Kpc) to the Local Group galaxy WLM. The analysis...
The Araucaria Project: VLT-spectroscopy of blue massive stars in NGC 55 (2008)
Castro, N., Herrero, A., Garcia, M., Trundle, C., Bresolin, F., Gieren, W., ...
This is the first paper of a series devoted to studying the population of blue massive stars in NGC 55, a galaxy of the Sculptor group at a distance of about 2 Mpc. We have obtained optical...
Gieren, W., Pietrzynski, G., Szewczyk, O., Bresolin, F., Urbaneja, M. A., ...
We have obtained deep images in the near-infrared J and K filters for several fields in the Local Group galaxy WLM. We report intensity mean magnitudes for 31 Cepheids located in these fields which...
OGLE-2005-BLG-071Lb, the Most Massive M-Dwarf Planetary Companion? (2008)
Dong, Subo, Gould, Andrew, Udalski, Andrzej, Anderson, Jay, Christie, G. W., Gaudi, B. S., ...
We combine all available information to constrain the nature of OGLE-2005-BLG-071Lb, the second planet discovered by microlensing and the first in a high-magnification event. These include...
Pietrzynski, G., Gieren, W., Szewczyk, O., Walker, A., Rizzi, L., Bresolin, F., ...
We have obtained single-phase near-infrared magnitudes in the J and K bands for a sample of 78 RR Lyrae stars in the Sculptor dSph galaxy. Applying different theoretical and empirical calibrations of...
Udalski, A, Pont, F, Naef, D, Melo, C, Bouchy, F, Santos, N C, ...
We present results of the photometric campaign for planetary and low-luminosity object transits conducted by the OGLE survey in the 2005 season (Campaign #5). About twenty of the most promising...
Urbaneja, M. A., Bresolin, F., Przybilla, N., Gieren, W., Pietrzynski, G.
A quantitative spectral analysis of 24 A supergiants in the Sculptor Group spiral galaxy NGC 300 at a distance of 1.9 Mpc is presented. A new method is introduced to analyze low resolution (~5 AE)...
Binary Lenses in OGLE III EWS Database. Season 2005 (2008)
Skowron, J., Jaroszynski, M., Udalski, A., Kubiak, M., Szymanski, M. K., Pietrzynski, G., ...
We present nine new binary lens candidates from OGLE-III Early Warning System database for the season of 2005. We have also found four events interpreted as single mass lensing of double sources. The...
Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing (2008)
Gaudi, B. S., Bennett, D. P., Udalski, A., Gould, A., Christie, G. W., Maoz, D., ...
Searches for extrasolar planets have uncovered an astonishing diversity of planetary systems, yet the frequency of solar system analogs remains unknown. The gravitational microlensing planet search...
Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing (2008)
Gaudi, BS, Bennett, DP, Udalski, A, Gould, A, Christie, GW, Maoz, D, ...
Udalski, A., Pont, F., Naef, D., Melo, C., Bouchy, F., Santos, N. C., ...
We present results of the photometric campaign for planetary and low-luminosity object transits conducted by the OGLE survey in 2005 season (Campaign #5). About twenty most promising candidates...
A transiting planet among 23 new near-threshold candidates from the OGLE survey - OGLE-TR-182 (2007)
Pont, F., Tamuz, O., Udalski, A., Mazeh, T., Bouchy, F., Melo, C., ...
By re-processing the data of the second season of the OGLE survey for planetary transits and adding new mesurements on the same fields gathered in subsequent years with the OGLE telescope, we have...
Soszynski, I., Dziembowski, W. A., Udalski, A., Kubiak, M., Szymanski, M. K., Pietrzynski, G., ...
Period-luminosity (PL) relations of variable red giants in the Large (LMC) and Small Magellanic Clouds (SMC) are presented. The PL diagrams are plotted in three planes: logP-K_S, logP-W_{JK}, and...
Gieren, W., Pietrzynski, G., Soszynski, I., Bresolin, F., Kudritzki, R. P., Storm, J., ...
We have obtained deep images in the near-infrared J and K filters of four fields in the Sculptor Group spiral galaxy NGC 55 with the ESO VLT and ISAAC camera. For 40 long-period Cepheid variables in...
Pietrzynski, G., Gieren, W., Udalski, A., Soszynski, I., Bresolin, F., Kudritzki, R. P., ...
We have conducted an extensive wide-field imaging survey for Cepheid variables in the Local Group irregular galaxy WLM. From data obtained on 101 nights, we have discovered 60 Cepheids which include...
Pont, F, Moutou, C, Gillon, Michaël, Udalski, A, Bouchy, F, Fernandes, J M, ...
Transiting planets are essential to study the structure and evolution of extra-solar planets. For that purpose, it is important to measure precisely the radius of these planets. Here we report new...
A new Neptune-mass planet orbiting HD 219828 (2007)
Melo, C., Santos, N. C., Gieren, W., Pietrzynski, G., Ruiz, M. T., Sousa, S. G., ...
Two years ago a new benchmark for the planetary survey was set with the discoveries of three extrasolar planets with masses below 20$M_\oplus$. In particular, the serendipitous discovery of the...
First Space-Based Microlens Parallax Measurement: Spitzer Observations of OGLE-2005-SMC-001 (2007)
Dong, Subo, Udalski, A., Gould, A., Reach, W. T., Christie, G. W., Boden, A. F., ...
We combine Spitzer and ground-based observations to measure the microlens parallax of OGLE-2005-SMC-001, the first such space-based determination since S. Refsdal proposed the idea in 1966. The...
Binary Lenses in OGLE-III EWS Database. Season 2004 (2007)
Jaroszynski, M., Skowron, J., Udalski, A., Kubiak, M., Szymanski, M. K., Pietrzynski, G., ...
We present 19 binary lens candidates from OGLE-III Early Warning System database for the season of 2004. We have also found five events interpreted as single mass lensing of double sources. The...
Udalski, A., Szymanski, M. K., Kubiak, M., Pietrzynski, G., Soszynski, I., Zebrun, K., ...
We present results of the long term monitoring of the gravitational lens QSO 2237+0305 conducted during the OGLE survey. Light curves of all four components of the lens obtained during the second...
A new Neptune-mass planet orbiting HD219828 (2007)
Melo, C., Santos, N. C., Gieren, W., Pietrzynski, G., Ruiz, M. T., Sousa, S. G., ...
Publicación ISI
Pont, F., Moutou, C., Gillon, M., Udalski, A., Bouchy, F., Fernandes, J. M., ...
Publicación ISI
A new Neptune-mass planet orbiting HD219828 (2007)
Melo, C., Santos, N. C., Gieren, W., Pietrzynski, G., Ruiz, M. T., Sousa, S. G., ...
Publicación ISI
Pont, F., Moutou, C., Gillon, M., Udalski, A., Bouchy, F., Fernandes, J. M., ...
Publicación ISI
Evans, C. J., Bresolin, F., Urbaneja, M. A., Pietrzynski, G., Gieren, W.
We have obtained multi-object spectroscopy of luminous blue supergiants in NGC 3109, a galaxy at the periphery of the Local Group at ~1.3 Mpc. We present a detailed catalog including finding charts,...
Pietrzynski, G., Gieren, W., Soszynski, I., Udalski, A., Bresolin, F., ...
We have detected, for the first time, Cepheid variables in the Sculptor Group SB(s)m galaxy NGC 55. From wide-field images obtained in the optical V and I bands during 77 nights in 2002-2003, we have...
Spectroscopy of blue and yellow long-period variables in the small magellanic cloud (2006)
R. E. Mennickent, W. Gieren, L. S. Cidale, G. Pietrzynski, B. Sabogal
Spectroscopy of blue and yellow long-period variables in the small magellanic cloud
OGLE 2004-BLG-254: a K3 III Galactic Bulge Giant spatially resolved by a single microlens (2006)
Cassan, A., Fouque, P., Brillant, S., Dominik, M., Greenhill, J., ...
We present an analysis of OGLE 2004-BLG-254, a high-magnification and relatively short duration microlensing event in which the source star, a Bulge K3-giant, has been spatially resolved by a...
Wyrzykowski, L., Udalski, A., Mao, S., Kubiak, M., Szymanski, M. K., Pietrzynski, G., ...
We present the first systematic search for microlensing events with variability in their baselines using data from the third phase of the Optical Gravitational Lensing Experiment (OGLE-III). A total...
Removing the Microlensing Blending-Parallax Degeneracy Using Source Variability (2006)
Assef, R.J., Gould, A., Afonso, C., Albert, J.N., Andersen, J., Ansari, R., ...
Microlensing event MACHO 97-SMC-1 is one of the rare microlensing events for which the source is a variable star, simply because most variable stars are systematically eliminated from microlensing...
The Araucaria Project. A Wide-Field Photometric Survey for Cepheid Variables in NGC 3109 (2006)
Pietrzynski, G., Gieren, W., Udalski, A., Soszynski, I., Bresolin, F., Kudritzki, R. P., ...
We have obtained mosaic images of NGC 3109 in the V and I bands on 74 nights, spanning approximately one year. From these data, we have conducted an extensive search for Cepheid variables over the...
Gieren, W., Pietrzynski, G., Nalewajko, K., Soszynski, I., Bresolin, F., Kudritzki, R. P., ...
We have measured near-infrared magnitudes in the J and K bands for 56 Cepheid variables in the Local Group galaxy NGC 6822 with well-determined periods and optical light curves in the V and I bands....
Soszynski, I., Gieren, W., Pietrzynski, G., Bresolin, F., Storm, J.
We present near-infrared J- and K-band photometry of 77 Cepheid variables in the Local Group galaxy NGC 3109. Combining our data with the previously published optical V- and I-band photometry of...
Microlens OGLE-2005-BLG-169 Implies Cool Neptune-Like Planets are Common (2006)
Gould, A., Udalski, A., An, D., Bennett, D. P., Dong, S., ...
We detect a Neptune mass-ratio (q~8e-5) planetary companion to the lens star in the extremely high-magnification (A~800) microlensing event OGLE-2005-BLG-169. If the parent is a main-sequence star,...
Discovery of a Cool Planet of 5.5 Earth Masses Through Gravitational Microlensing (2006)
Bennett, D. P., Fouque, P., Williams, A., Dominik, M., Jorgensen, U. G., ...
In the favoured core-accretion model of formation of planetary systems, solid planetesimals accumulate to build up planetary cores, which then accrete nebular gas if they are sufficiently massive....
The Araucaria Project. Bright Variable Stars in NGC 6822 from a Wide-Field Imaging Survey (2006)
Mennickent, R. E., Gieren, W., Soszynski, I., Pietrzynski, G.
We have performed a search for variable stars in the dwarf irregular galaxy NGC 6822 using wide-field multi-epoch VI photometry down to a limiting magnitude $V$ $\sim$ 22. Apart from the Cepheid...
Pietrzynski, G., Gieren, W., Soszynski, I., Bresolin, F., Kudritzki, R. P., Dall'Ora, M., ...
We have measured accurate near-infrared magnitudes in the J and K bands of 39 Cepheid variables in IC 1613 with well-determined periods and optical VI light curves. Using the template light curve...
Removing the Microlensing Blending-Parallax Degeneracy Using Source Variability (2006)
Assef, R.J., Gould, A., Afonso, C., Albert, J.N., Andersen, J., Ansari, R., ...
Microlensing event MACHO 97-SMC-1 is one of the rare microlensing events for which the source is a variable star, simply because most variable stars are systematically eliminated from microlensing...
Removing the microlensing blending-parallax degeneracy using source variability (2006)
Assef, R. J., Gould, A., Afonso, C., Albert, J. N., Andersen, J., Ansari, R., ...
Microlensing event MACHO 97-SMC-1 is one of the rare microlensing events for which the source is a variable star, simply because most variable stars are systematically eliminated from microlensing...
Spectroscopy of blue and yellow long-period variables in the small magellanic cloud (2006)
Cidale, L. S., Gieren, W., Mennickent, R. E., Pietrzynski, G., Sabogal, B.
Presentamos espectroscopÃa de 17 estrellas variables brillantes posibles miembros de la Nube Pequeña de Magallanes. Estas estrellas son variables OGLE cuya periodicidad fotométrica no ha sido...
Discovery of a cool planet of 5.5 Earth masses through gravitational microlensing (2006)
Beaulieu, JP, Bennett, DP, Fouque, P, Williams, A, Dominik, M, Jorgensen, UG, ...
OGLE 2004-BLG-254: a K3 III Galactic bulge giant spatially resolved by a single microlens (2006)
Cassan, A, Beaulieu, JP, Fouque, P, Brilliant, S, Dominik, M, Greenhill, JG, ...
Soszynski, I., Udalski, A., Kubiak, M., Szymanski, M. K., Pietrzynski, G., Zebrun, K., ...
We use the OGLE-II and OGLE-III data in conjunction with the 2MASS near-infrared (NIR) photometry to identify and study Miras and Semiregular Variables (SRVs) in the Large Magellanic Cloud. We found...
Potential Direct Single-Star Mass Measurement (2005)
Ghosh, H., Depoy, D.L., Gal-Yam, A., Gaudi, B.S., Gould, A., Han, C., ...
We analyze the lightcurve of the microlensing event OGLE-2003-BLG-175/MOA-2003-BLG-45 and show that it has two properties that, when combined with future high resolution astrometry, could lead to a...
A Jovian-mass Planet in Microlensing Event OGLE-2005-BLG-071 (2005)
Udalski, A., Jaroszynski, M., Paczynski, B., Kubiak, M., Szymanski, M. K., Soszynski, I., ...
We report the discovery of a several-Jupiter mass planetary companion to the primary lens star in microlensing event OGLE-2005-BLG-071. Precise (
Classical Cepheids as Age Indicators (2005)
Marconi, M., Bono, G., Caputo, F., Cassisi, S., Pietrukowicz, P., Pietrzynski, G.
Theoretical Period-Age and Period-Age-Color relations for different chemical compositions have been recently derived using an updated homogeneous set of evolutionary and pulsational models. We apply...
{Results from a long-term observational project called the Araucaria Project are presented. Based on Wide Field optical monitoring of 8 nearby galaxies, covering a large range of metallicities, more...
Mass Estimates for Some of the Binary Lenses in OGLE III Database (2005)
Jaroszynski, M., Udalski, A., Kubiak, M., Szymanski, M., Pietrzynski, G., Soszynski, I., ...
We model binary microlensing events OGLE 2003-BLG-170, 267, and 291. Source angular sizes are measured for the events 267 and 291. Model fits to the light curves give parallaxes for the events 267...
Gieren, W., Storm, J., Barnes III, T. G., Fouque, P., Pietrzynski, G., Kienzle, F.
We have applied the infrared surface brightness (ISB) technique to derive distances to 13 Cepheids in the LMC which span a period range from 3 to 42 days. From the absolute magnitudes of the...
OGLE-2003-BLG-238: Microlensing Mass Estimate of an Isolated Star (2005)
Jiang, Guangfei, DePoy, D. L., Gal-Yam, A., Gaudi, B. S., Gould, A., Han, C., ...
Microlensing is the only known direct method to measure the masses of stars that lack visible companions. In terms of microlensing observables, the mass is given by M=(c^2/4G)\\tilde r_E \\theta_E...
Gieren, W., Pietrzynski, G., Walker, A., Bresolin, F., Minniti, D., Kudritzki, R. P., ...
In a previous paper, we reported on the discovery of more than a hundred new Cepheid variables in the Sculptor Group spiral NGC 300 from wide-field images taken in the B and V photometric bands at...
A Catalog of OB Associations in the spiral galaxy NGC 300 (2005)
Pietrzynski, G., Gieren, W., Fouque, P., Pont, F.
We present results of a search for OB associations in NGC 300. Using an automatic and objective method (PLC technique) 117 objects were found. Statistical tests indicate that our sample is...
Planetary Detection Efficiency of the Magnification 3000 Microlensing Event OGLE-2004-BLG-343 (2005)
Dong, Subo, DePoy, D. L., Gaudi, B. S., Gould, A., Han, C., ...
OGLE-2004-BLG-343 was a microlensing event with peak magnification A_{max}=3000+/-1100, by far the highest-magnification event ever analyzed and hence potentially extremely sensitive to planets...
A Jovian-mass Planet in Microlensing Event OGLE-2005-BLG-071 (2005)
Udalski, A., Jaroszynski, M., Paczynski, B., Kubiak, M., Szymanski, M. K., Soszynski, I., ...
We report the discovery of a several-Jupiter mass planetary companion to the primary lens star in microlensing event OGLE-2005-BLG-071. Precise (
Mean JHK Magnitudes of Fundamental-Mode Cepheids from Single-Epoch Observations (2005)
Soszynski, I., Gieren, W., Pietrzynski, G.
We present an empirical method for converting single-point near-infrared J, H, and K measurements of fundamental-mode Cepheids to mean magnitudes, using complete light curves in V or I bands. The...
Gieren, W., Pietrzynski, G., Soszynski, I., Bresolin, F., Kudritzki, R. P., Minniti, D., ...
We have obtained deep near-infrared images in J and K filters of three fields in the Sculptor galaxy NGC 300 with the ESO VLT and ISAAC camera. For 16 Cepheid variables in these fields, we have...
Gieren, W., Storm, J., Barnes III, T. G., Fouque, P., Pietrzynski, G., Kienzle, F.
We have applied the infrared surface brightness (ISB) technique to derive distances to 13 Cepheids in the LMC which span a period range from 3 to 42 days. From the absolute magnitudes of the...
Microlensing optical depth toward the Galactic Bulge using bright sources from OGLE-II (2005)
Sumi, T., Wozniak, P. R., Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., ...
We present a measurement of the microlensing optical depth toward the Galactic Bulge based on 4 years of the OGLE-II survey using Red Clump Giant (RCG). Using 32 events we find...
A Jovian-mass Planet in Microlensing Event OGLE-2005-BLG-071 (2005)
Udalski, A., Jaroszynski, M., Paczynski, B., Kubiak, M., Szymanski, M. K., Soszynski, I., ...
We report the discovery of a several-Jupiter mass planetary companion to the primary lens star in microlensing event OGLE-2005-BLG-071. Precise (
Gieren, W., Storm, J., Barnes III, T. G., Fouque, P., Pietrzynski, G., Kienzle, F.
We have applied the infrared surface brightness (ISB) technique to derive distances to 13 Cepheids in the LMC which span a period range from 3 to 42 days. From the absolute magnitudes of the...
A Jovian-mass Planet in Microlensing Event OGLE-2005-BLG-071 (2005)
Udalski, A., Jaroszynski, M., Paczynski, B., Kubiak, M., Szymanski, M. K., Soszynski, I., ...
We report the discovery of a several-Jupiter mass planetary companion to the primary lens star in microlensing event OGLE-2005-BLG-071. Precise (
Gieren, W., Storm, J., Barnes III, T. G., Fouque, P., Pietrzynski, G., Kienzle, F.
We have applied the infrared surface brightness (ISB) technique to derive distances to 13 Cepheids in the LMC which span a period range from 3 to 42 days. From the absolute magnitudes of the...
A Jovian-Mass Planet in Microlensing Event OGLE-2005-BLG-071 (2005)
Udalski, A, Jaroszynski, M, Paczynski, B, Kubiak, M, Szymanski, MK, Soszynski, I, ...
Soszynski, I., Udalski, A., Kubiak, M., Szymanski, M. K., Pietrzynski, G., Zebrun, K., ...
We used the OGLE-II and OGLE-III photometry of red giants in the Large Magellanic Cloud to select and study objects revealing ellipsoidal variability. We detected 1546 candidates for long period...
Classical Cepheid Pulsation Models. X. The Period-Age Relation (2004)
Bono, G., Marconi, M., Cassisi, S., Caputo, F., Gieren, W., Pietrzynski, G.
We present new Period-Age (PA) and Period-Age-Color (PAC) relations for fundamental and first overtone classical Cepheids. Current predictions rely on homogeneous sets of evolutionary and pulsation...
Udalski, A., Szymanski, M. K., Kubiak, M., Pietrzynski, G., Soszynski, I., Zebrun, K., ...
We present results of two observing campaigns conducted by the OGLE-III survey in the 2003 observing season aiming at the detection of new objects with planetary transiting companions. Six fields of...
Search for Low-Mass Exoplanets by Gravitational Microlensing at High Magnification (2004)
Abe, F., Bennett, D. P., Bond, I. A., Eguchi, S., Furuta, Y., Hearnshaw, J. B., ...
Observations of the gravitational microlensing event MOA 2003-BLG-32/OGLE 2003-BLG-219 are presented for which the peak magnification was over 500, the highest yet reported. Continuous observations...
Pietrzynski, G., Gieren, W., Udalski, A., Bresolin, F., Kudritzki, R. P., Soszynski, I., ...
We have obtained mosaic images of NGC 6822 in V and I bands on 77 nights. From these data, we have conducted an extensive search for Cepheid variables over the entire field of the galaxy, and we have...
Binary Lenses in OGLE-III EWS Database. Seasons 2002--2003 (2004)
Jaroszynski, M., Udalski, A., Kubiak, M., Szymanski, M., Pietrzynski, G., Soszynski, I., ...
We present 15 binary lens candidates from OGLE-III Early Warning System database for seasons 2002-2003. We also found 15 events interpreted as single mass lensing of double sources. The candidates...
Variability-selected QSO candidates in OGLE-II Galactic Bulge fields (2004)
Sumi, T., Wozniak, P. R., Eyer, L., Dobrzycki, A., Udalski, A., Szymanski, M. K., ...
We present 97 QSO candidates in 48 Galactic Bulge fields of the Optical Gravitational Lensing Experiment II (OGLE-II) covering about 11 square degrees, which are selected via their variability. We...
Soszynski, I., Udalski, A., Kubiak, M., Szymanski, M., Pietrzynski, G., Zebrun, K., ...
We present analysis of the large sample of variable red giants from the Large and Small Magellanic Clouds detected during the second phase of the Optical Gravitational Lensing Experiment (OGLE-II)...
Gieren, W., Pietrzynski, G., Walker, A., Bresolin, F., Minniti, D., Kudritzki, R. P., ...
In a previous paper, we reported on the discovery of more than a hundred new Cepheid variables in the Sculptor Group spiral NGC 300 from wide-field images taken in the B and V photometric bands at...
Bonanos, A. Z., Stanek, K. Z., Udalski, A., Wyrzykowski, L., Zebrun, K., Kubiak, M., ...
We present a high-precision I-band light curve for the Wolf-Rayet binary WR 20a, obtained as a sub-project of the Optical Gravitational Lensing Experiment. Rauw et al. have recently presented...
Wyrzykowski, L., Udalski, A., Kubiak, M., Szymanski, M. K., Zebrun, K., Soszynski, I., ...
We present new version of the OGLE-II catalog of eclipsing binary stars detected in the Small Magellanic Cloud, based on Difference Image Analysis catalog of variable stars in the Magellanic Clouds...
OGLE-2003-BLG-238: Microlensing Mass Estimate of an Isolated Star (2004)
Jiang, Guangfei, DePoy, D. L., Gal-Yam, A., Gaudi, B. S., Gould, A., Han, C., ...
Microlensing is the only known direct method to measure the masses of stars that lack visible companions. In terms of microlensing observables, the mass is given by M=(c^2/4G)\tilde r_E \theta_E and...
OGLE 2003-BLG-235/MOA 2003-BLG-53: A planetary microlensing event (2004)
Bond, I. A., Udalski, A., Jaroszynski, M., Rattenbury, N. J., Paczynski, B., Soszynski, I., ...
We present observations of the unusual microlensing event OGLE 2003-BLG-235/MOA 2003-BLG-53. In this event a short duration (~7 days) low amplitude deviation in the light curve due a single lens...
Yoo, Jaiyul, DePoy, D. L., Gal-Yam, A., Gaudi, B. S., Gould, A., Han, C., ...
We develop a new method of modeling microlensing events based on a Monte Carlo simulation that incorporates both a Galactic model and the constraints imposed by the observed characteristics of the...
Potential Direct Single-Star Mass Measurement (2004)
Ghosh, H., Depoy, D.L., Gal-Yam, A., Gaudi, B.S., Gould, A., Han, C., ...
We analyze the lightcurve of the microlensing event OGLE-2003-BLG-175/MOA-2003-BLG-45 and show that it has two properties that, when combined with future high resolution astrometry, could lead to a...
OGLE-2003-BLG-238: Microlensing Mass Estimate of an Isolated Star (2004)
Jiang, Guangfei, DePoy, D. L., Gal-Yam, A., Gaudi, B. S., Gould, A., Han, C., ...
Microlensing is the only known direct method to measure the masses of stars that lack visible companions. In terms of microlensing observables, the mass is given by M=(c^2/4G)\\tilde r_E \\theta_E...
Gieren, W., Pietrzynski, G., Walker, A., Bresolin, F., Minniti, D., Kudritzki, R. P., ...
In a previous paper, we reported on the discovery of more than a hundred new Cepheid variables in the Sculptor Group spiral NGC 300 from wide-field images taken in the B and V photometric bands at...
Potential Direct Single-Star Mass Measurement (2004)
Ghosh, H., Depoy, D.L., Gal-Yam, A., Gaudi, B.S., Gould, A., Han, C., ...
We analyze the lightcurve of the microlensing event OGLE-2003-BLG-175/MOA-2003-BLG-45 and show that it has two properties that, when combined with future high resolution astrometry, could lead to a...
OGLE-2003-BLG-238: Microlensing Mass Estimate of an Isolated Star (2004)
Jiang, Guangfei, DePoy, D. L., Gal-Yam, A., Gaudi, B. S., Gould, A., Han, C., ...
Microlensing is the only known direct method to measure the masses of stars that lack visible companions. In terms of microlensing observables, the mass is given by M=(c^2/4G)\\tilde r_E \\theta_E...
Gieren, W., Pietrzynski, G., Walker, A., Bresolin, F., Minniti, D., Kudritzki, R. P., ...
In a previous paper, we reported on the discovery of more than a hundred new Cepheid variables in the Sculptor Group spiral NGC 300 from wide-field images taken in the B and V photometric bands at...
OGLE-2003-BLG-238: Microlensing Mass Estimate of an Isolated Star (2004)
Jiang, G, DePoy, DL, Gal-Yam, A, Gaudi, BS, Gould, A, Han, C, ...
Potential Direct Single-Star Mass Measurement (2004)
Ghosh, H, DePoy, DL, Gal-Yam, A, Gaudi, BS, Gould, A, Han, C, ...
Wyrzykowski, L., Udalski, A., Schechter, P. L., Szewczyk, O., Szymanski, M., Kubiak, M., ...
We present results of the long term monitoring of the gravitationally lensed quasar HE1104-1805. The photometric data were collected between August 1997 and January 2002 as a subproject of the OGLE...
Beta Cephei and SPB stars in the Large Magellanic Cloud (2003)
Kolaczkowski, Z., Pigulski, A., Soszynski, I., Udalski, A., Szymanski, M., Kubiak, M., ...
This is a progress report of the study of pulsating main-sequence stars in the LMC. Using the OGLE-II photometry supplemented by the MACHO photometry, we find 64 Beta Cephei stars in the LMC. Their...
OGLE-2003-BLG-262: Finite-Source Effects from a Point-Mass Lens (2003)
Yoo, Jaiyul, DePoy, D. L., Gal-Yam, A., Gaudi, B. S., Gould, A., Han, C., ...
We analyze OGLE-2003-BLG-262, a relatively short, t_E=12.5+-0.1day, microlensing event generated by a point-mass lens transiting the face of a K giant source in the Galactic bulge. We use the...
Udalski, A., Pietrzynski, G., Szymanski, M., Kubiak, M., Zebrun, K., Soszynski, I., ...
The photometric data collected by OGLE-III during the 2001 and 2002 observational campaigns aiming at detection of planetary or low-luminosity object transits were corrected for small scale...
Soszynski, I., Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Wozniak, P., ...
We present the catalog of RR Lyrae stars discovered in a 4.5 square degrees area in the central parts of the Large Magellanic Cloud (LMC). Presented sample contains 7612 objects, including 5455...
Sumi, T., Wu, X., Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., ...
We present a proper motion (\mu) catalogue of 5,080,236 stars in 49 Optical Gravitational Lensing Experiment II (OGLE-II) Galactic bulge (GB) fields, covering a range of -11 deg.
Wyrzykowski, L., Udalski, A., Kubiak, M., Szymanski, M., Zebrun, K., Soszynski, I., ...
We present the catalog of 2580 eclipsing binary stars detected in 4.6 square degree area of the central parts of the Large Magellanic Cloud. The photometric data were collected during the second...
Udalski, A., Szewczyk, O., Zebrun, K., Pietrzynski, G., Szymanski, M., Kubiak, M., ...
We present results of the second planetary and low-luminosity object transit campaign conducted by the OGLE-III survey. Three fields (35'x35' each) located in the Carina regions of the Galactic disk...
Soszynski, I., Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Wozniak, P., ...
We present the catalog of RR Lyrae stars from 2.4 square degrees of central parts of the Small Magellanic Cloud (SMC). The photometric data were collected during four years of the OGLE-II...
Double-periodic blue variables in the Magellanic Clouds (2002)
Mennickent, R. E., Pietrzynski, G., Diaz, M., Gieren, W.
We report the discovery, based on an inspection of the OGLE-II database, of a group of blue variables in the Magellanic Clouds showing simultaneously two kinds of photometric variability: a...
Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Soszynski, I., Wozniak, P., ...
We present the VI photometric maps of the Galactic bulge. They contain VI photometry and astrometry of about 30 million stars from 49 fields of 0.225 square degree each in the Galactic center region....
Light Curve Analysis of Be Star Candidates in the Small Magellanic Cloud (2002)
Mennickent, R. E., Pietrzynski, G., Gieren, W.
The recent discovery, based on a search of public OGLE data, of Be star candidates in the Small Magellanic Cloud showing spectacular photometric variations (Mennickent et al. 2002), has motivated...
We have obtained deep imaging in the near-infrared J and K bands for 2 nearby fields in the bar of the LMC with the ESO NTT telescope, under exquisite seeing conditions. The K, J-K color-magnitude...
Udalski, A., Zebrun, K., Szymanski, M., Kubiak, M., Soszynski, I., Szewczyk, O., ...
The photometric data collected during 2001 season OGLE-III planetary/low luminosity object transit campaign were reanalyzed with the new transit search technique -- the BLS method by Kovacs, Zucker...
Smith, M. C., Mao, S., Wozniak, P., Udalski, A., Szymanski, M., Kubiak, M., ...
We describe a highly unusual microlensing event, OGLE-1999-BUL-19, which exhibits multiple peaks in its light curve. The Einstein radius crossing time for this event is approximately one year, which...
Microlensing of Relativistic Knots in the Quasar HE1104-1805 (2002)
Schechter, Paul L., Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Soszynski, I., ...
We present 3 years of photometry of the ``Double Hamburger'' lensed quasar, HE1104-1805, obtained on 102 separate nights using the OGLE 1.3-m telescope. Both the A and B images show variations, but...
Soszynski, I., Zebrun, K., Udalski, A., Wozniak, P. R., Szymanski, M., Kubiak, M., ...
We present a Catalog of high proper motion (HPM) stars detected in the foreground of central parts of the Magellanic Clouds. The Catalog contains 2161 objects in the 4.5 square degree area towards...
Mennickent, R. E., Pietrzynski, G., Gieren, W., Szewczyk, O.
Recently the OGLE experiment has provided accurate light curves and colours for about 2 millions stars in the Small Magellanic Cloud. We have examined this database for its content of Be stars,...
Variable Stars in the Field of Young Open Cluster NGC 581 (2002)
Wyrzykowski, L., Pietrzynski, G., Szewczyk, O.
We present results of the search for variable stars in the field of young open cluster NGC 581. Based on 19 nights of observations, 6 new variable stars were discovered. Two of them turned out to be...
Pietrzynski, G., Gieren, W., Udalski, A.
Based on 13 nights of observations of four fields in NGC 300, we have set up an extensive sequence of stars with accurate BVI photometry covering a relatively large (25 x 25 arcmin) region centered...
Udalski, A., Paczynski, B., Zebrun, K., Szymanski, M., Kubiak, M., Soszynski, I., ...
We present results of an extensive photometric search for planetary and low-luminosity object transits in the Galactic disk stars commencing the third phase of the Optical Gravitational Lensing...
Wozniak, P. R., Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Soszynski, I., ...
We present the first edition of a catalog of variable stars from OGLE-II Galactic Bulge data covering 3 years: 1997-1999. Typically 200-300 I band data points are available in 49 fields between -11...
Zebrun, K., Soszynski, I., Wozniak, P. R., Udalski, A., Kubiak, M., Szymanski, M., ...
We present the first edition of a catalog of variable stars found in the Magellanic Clouds using OGLE-II data obtained during four years: 1997-2000. The catalog covers about 7 square degrees of the...
Udalski, A., Wyrzykowski, L., Pietrzynski, G., Szewczyk, O., Szymanski, M., Kubiak, M., ...
We present results of the search for Cepheids in the galaxy IC1613 carried out as a sub-project of the OGLE-II microlensing survey. 138 Cepheids were found in the 14.2x14.2 arcmin region in the...
Mao, Shude, Smith, Martin C., Wozniak, P., Udalski, A., Kubiak, M. Szymanski M., Pietrzynski, G., ...
We describe the discovery of the longest microlensing event ever observed, OGLE-1999-BUL-32, also independently identified by the MACHO collaboration as MACHO-99-BLG-22. This unique event has an...
Difference Image Analysis of the OGLE-II bulge data. II. Microlensing events (2001)
Wozniak, P. R., Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Soszynski, I., ...
We present a sample of microlensing events discovered in the Difference Image Analysis (DIA) of the OGLE-II images collected during 3 observing seasons, 1997--1999. 4424 light curves pass our...
A Catalog of OB Associations in the spiral galaxy NGC 300 (2001)
Pietrzynski, G., Gieren, W., Fouque, P., Pont, F.
We present results of a search for OB associations in NGC 300. Using an automatic and objective method (PLC technique) 117 objects were found. Statistical tests indicate that our sample is...
Soszynski, I., Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Wozniak, P., ...
We present a sample of 76 double-mode Cepheids detected in the 4.5 square degree area in the central part of the LMC. 19 stars from the sample pulsate in the fundamental mode and the first overtone...
A Catalog of OB Associations in the spiral galaxy NGC 300 (2001)
Pietrzynski, G., Gieren, W., Fouque, P., Pont, F.
We present results of a search for OB associations in NGC 300. Using an automatic and objective method (PLC technique) 117 objects were found. Statistical tests indicate that our sample is...
A Catalog of OB Associations in the spiral galaxy NGC 300 (2001)
Pietrzynski, G., Gieren, W., Fouque, P., Pont, F.
We present results of a search for OB associations in NGC 300. Using an automatic and objective method (PLC technique) 117 objects were found. Statistical tests indicate that our sample is...
Soszynski, I., Zebrun, K., Wozniak, P. R., Mao, S., Udalski, A., Szymanski, M., ...
We present the photometry and theoretical models for a Galactic bulge microlensing event OGLE-2000-BUL-43. The event is very bright with I=13.54 mag, and has a very long time scale, t_E=156 days. The...
The Optical Gravitational Lensing Experiment. Ages of about 600 Star Clusters from the LMC (2000)
We present results of age determination based on the standard procedure of isochrone fitting for about 600 star clusters younger than about 1.2 Gyr from the central parts of the LMC. Comparison of...
We present 100 multiple cluster candidates selected from the OGLE catalog of star clusters in the Large Magellanic Cloud. Statistical analysis shows that the significant fraction of these objects may...
Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Soszynski, I., Wozniak, P., ...
We present the BVI photometric maps of the Large Magellanic Cloud. They contain BVI photometry and astrometry of more than 7 million stars from the central parts of the LMC. The data were collected...
The Optical Gravitational Lensing Experiment. A Hunt for Caustic Crossings in QSO 2237+0305 (2000)
Wozniak, P. R., Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Soszynski, I., ...
In 1998 The Optical Gravitational Lensing Experiment (OGLE) successfully implemented automated data reductions for QSO 2237+0305. Using a new image subtraction method we achieved a differential...
Udalski, A., Zebrun, K., Szymanski, M., Kubiak, M., Pietrzynski, G., Soszynski, I., ...
We present the Catalog of microlensing events detected toward the Galactic bulge in three observing seasons, 1997--1999, during the OGLE-II microlensing survey. The search for microlensing events was...
Combined Analysis of the Binary Lens Caustic-Crossing Event MACHO 98-SMC-1 (2000)
Afonso, C, Alard, C, Albert, JN, Andersen, J, Ansari, R, Aubourg, E, ...
Pietrzynski, G., Udalski, A., Kubiak, M., Szymanski, M., Wozniak, P., Zebrun, K.
We present the catalog of star clusters found in the area of about 5.8 square degree in the central regions of the Large Magellanic Cloud. It contains data for 745 clusters. 126 of them are new...
We present Cepheids located in the close neighborhood of star clusters from the Magellanic Clouds. 204 and 132 such stars were found in the LMC and SMC, respectively. The lists of objects were...
Udalski, A., Soszynski, I., Szymanski, M., Kubiak, M., Pietrzynski, G., Wozniak, P., ...
We present the Catalog of Cepheids from the SMC which contains data for 2049 objects detected in the 2.4 square degree area of central parts of the SMC. For each object period, BVI photometry,...
Udalski, A., Soszynski, I., Szymanski, M., Kubiak, M., Pietrzynski, G., Wozniak, P., ...
We present the Catalog of Cepheids from the LMC. The Catalog contains 1333 objects detected in the 4.5 square degree area of central parts of the LMC. About 3.4*10^5 BVI measurements of these stars...
The Optical Gravitational Lensing Experiment. UBVI Photometry of Stars in Baade's Window (1999)
Paczynski, B., Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Soszynski, I., ...
We present UBVI photometry for 8530 stars in Baade's Window obtained during the OGLE-II microlensing survey. Among these are over one thousand red clump giants. 1391 of them have photometry with...
Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Soszynski, I., Wozniak, P., ...
We present Period-Luminosity-Color and Period-Luminosity relations of classical Cepheids constructed for about 1280 Cepheids from the LMC and 2140 from the SMC. High quality BVI observations (120-360...
The Optical Gravitational Lensing Experiment. Age of Star Clusters from the SMC (1999)
We present determination of age of clusters from 2.4 square degree region of the SMC bar. The photometric data were taken from the BVI maps of the SMC and catalog of clusters in this galaxy obtained...
We present the list of potential multiple star clusters from the central part of the SMC. Presented systems were selected from the catalog of star clusters from the SMC. We find 23 suspected cluster...
The list of 127 eclipsing stars in optical coincidence with star clusters from the SMC is presented. It was prepared using the catalogs of eclipsing systems and star clusters from the SMC based on...
The Optical Gravitational Lensing Experiment. Monitoring of QSO 2237+0305 (1999)
Wozniak, P. R., Alard, C., Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., ...
We present results from 2 years of monitoring of Huchra's lens (QSO 2237+0305) with the 1.3 m Warsaw telescope on Las Campanas, Chile. Photometry in the V band was done using a newly developed method...
Udalski, A., Soszynski, I., Szymanski, M., Kubiak, M., Pietrzynski, G., Wozniak, P., ...
We present a sample of 93 double-mode Cepheids detected in the 2.4 square degree area in the central part of the SMC. 23 stars from the sample pulsate in the fundamental mode and the first overtone...
Udalski, A., Soszynski, I., Szymanski, M., Kubiak, M., Pietrzynski, G., Wozniak, P., ...
We present a sample of 13 candidates for single-mode second overtone Cepheids discovered in the 2.4 square degree area of the SMC bar during the OGLE microlensing search. All candidates passed four...
Udalski, A., Soszynski, I., Szymanski, M., Kubiak, M., Pietrzynski, G., Wozniak, P., ...
We present the catalog of 1459 eclipsing binary stars detected in the central 2.4 square degree area of the Small Magellanic Cloud during the OGLE-II microlensing search. The sample includes objects...
The Optical Gravitational Lensing Experiment. Short Distance Scale to the LMC (1998)
Udalski, A., Pietrzynski, G., Wozniak, P., Szymanski, M., Kubiak, M., Zebrun, K.
We present {\it UBVI} photometry of the eclipsing binary HV2274 - the system which has been recently used for distance determination to the LMC by Guinan et al. (1998). We determine the interstellar...
Udalski, A., Kubiak, M., Szymanski, M., Pietrzynski, G., Wozniak, P., Zebrun, K.
We present photometry of the unique binary microlensing event MACHO-SMC-98-1 collected by the OGLE group. Particularly interesting observation was made close to the first caustic crossing which was...
Pietrzynski, G., Udalski, A., Kubiak, M., Szymanski, M., Wozniak, P., Zebrun, K.
We present the catalog of clusters found in the area of ~2.4 square degree in the central regions of the Small Magellanic Cloud. The catalog contains data for 238 clusters, 72 of them are new...
Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Wozniak, P., Zebrun, K.
We present three color, BVI maps of the Small Magellanic Cloud. The maps contain precise photometric and astrometric data for about 2.2 million stars from the central regions of the SMC bar covering...
Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Wozniak, P., Zebrun, K.
We present a new distance determination to the Large and Small Magellanic Clouds using the newly developed red clump stars method (Paczynski and Stanek 1998). This new, single-step, Hipparcos...
Udalski, A., Szymanski, M., Kubiak, M., Pietrzynski, G., Wozniak, P., Zebrun, K.
We present photometric observations of the MACHO-SMC-1 microlensing candidate collected by the OGLE-2 project. We show light curves of both components of the 1.6 arcsec blend: microlensed star and...