Kaluzny, J., Thompson, I. B., Rucinski, S. M., Krzeminski, W.
We present spectroscopic and photometric observations of the eclipsing binary V32 located in the central field of the globular cluster NGC 6397. The variable is a single-line spectroscopic binary...
Cluster AgeS Experiment (CASE): Deficiency of observed dwarf novae in globular clusters (2008)
Pietrukowicz, P., Kaluzny, J., Schwarzenberg-Czerny, A., Thompson, I. B., Pych, W., Krzeminski, W., ...
We present the results of a search for dwarf novae (DNe) in globular clusters (GCs). It is based on the largest available homogeneous sample of observations, in terms of the time span, number of...
Variable Stars in the Field of the Open Cluster NGC2204 (2008)
Rozyczka, M., Kaluzny, J., Krzeminski, W., Mazur, B.
We present the results of a variable stars search in the field of the old open cluster NGC 2204. Five new variables were found, four of them being eclipsing binaries. The sample includes a detached...
The underluminous type Ia supernova 2005bl and the class of objects similar to SN 1991bg (2008)
Taubenberger, S., Hachinger, S., Pignata, G., Mazzali, P. A., Contreras, C., Valenti, S., ...
The underluminous Type Ia Supernova 2005bl and the class of objects similar to SN 1991bg (2007)
Taubenberger, S., Hachinger, S., Pignata, G., Mazzali, P. A., Contreras, C., Valenti, S., ...
Optical observations of the Type Ia supernova (SN Ia) 2005bl in NGC 4070, obtained from -6 to +66 d with respect to the B-band maximum, are presented. The photometric evolution is characterised by...
Variable stars in the field of the old open cluster Melotte 66 (2007)
Zloczewski, K., Kaluzny, J., Krzeminski, W., Olech, A., Thompson, I. B.
We report the results of photometric monitoring of the Melotte 66 field in BVI filters. Ten variables were identified with nine being new discoveries. The sample includes eight eclipsing binaries of...
A Study of the Type Ia/IIn Supernova 2005gj from X-ray to the Infrared: Paper I (2007)
Prieto, J. L., Garnavich, P. M., Phillips, M. M., DePoy, D. L., Parrent, J., Pooley, D., ...
We present extensive ugrizYHJK photometry and optical spectroscopy of SN 2005gj obtained by the SDSS-II and CSP Supernova Projects, which give excellent coverage during the first 150 days after the...
Kaluzny, J., Rucinski, S. M., Thompson, I. B., Pych, W., Krzeminski, W.
We use photometric and spectroscopic observations of the detached eclipsing binary V209 omega Cen to derive the masses, radii, and luminosities of the component stars. The system exhibits total...
Kaluzny, J., Thompson, I. B., Rucinski, S. M., Pych, W., Stachowski, G., Krzeminski, W., ...
We use photometric and spectroscopic observations of the eclipsing binary OGLEGC-228 (V228) to derive the masses, radii, and luminosities of the component stars. Based on measured systemic velocity,...
The Peculiar SN 2005hk: Do Some Type Ia Supernovae Explode as Deflagrations? (2006)
Phillips, M. M., Li, W., Frieman, J. A., Blinnikov, S. I., DePoy, D., Prieto, J. L., ...
We present extensive u'g'r'i'BVRIYJHKs photometry and optical spectroscopy of SN 2005hk. These data reveal that SN 2005hk was nearly identical in its observed properties to SN 2002cx, which has been...
Eclipsing binaries in the open cluster NGC 2243 - I. Photometry (2006)
Kaluzny, J., Krzeminski, W., Thompson, I. B., Stachowski, G.
We obtained BV time series photometry for 12 variable stars from the field of the old open cluster NGC 2243. The sample includes 3 newly identified detached/semi-detached binaries. There are now four...
CCD photometry of distant open clusters NGC 2425, Haffner 10 and Czernik 29 (2005)
Pietrukowicz, P., Kaluzny, J., Krzeminski, W.
We present BVI photometry for poorly known southern hemisphere open clusters: NGC 2425, Haffner 10 and Czernik 29. We have calculated the density profile and established the number of stars in each...
Pietrukowicz, P., Kaluzny, J., Thompson, I. B., Jaroszynski, M., Schwarzenberg-Czerny, A., Krzeminski, W., ...
We report the identification of a new cataclysmic variable (denoted as CV2) and a probable microlensing event in the field of the globular cluster M22. Two outbursts were observed for CV2. During one...
Photometric study of the variable star population in the globular cluster NGC 6397 (2005)
Kaluzny, J., Thompson, I. B., Krzeminski, W.
We present the results of a photometric survey for variable stars in the central region of the nearby globular cluster NGC 6397.Time series photometry was obtained for 30 variable objects. The sample...
The afterglow and elliptical host galaxy of the short gamma-ray burst GRB 050724 (2005)
Berger, E., Price, P. A., Cenko, S. B., Gal-Yam, A., Soderberg, A. M., Kasliwal, M., ...
Despite a rich phenomenology, gamma-ray bursts (GRBs) are divided into two classes based on their duration and spectral hardness -- the long-soft and the short-hard bursts. The discovery of afterglow...
The Afterglows, Redshifts, and Properties of Swift Gamma-Ray Bursts (2005)
Berger, E., Kulkarni, S. R., Fox, D. B., Soderberg, A. M., Harrison, F. A., Nakar, E., ...
We present optical, near-IR, and radio follow up of sixteen Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, supplemented by data...
An HST Search for Supernovae Accompanying X-ray Flashes (2005)
Soderberg, A. M., Kulkarni, S. R., Fox, D. B., Berger, E., Price, P. A., Cenko, S. B., ...
We present the results from an Hubble Space Telescope/ACS search for supernovae associated with X-ray flashes 020903, 040701, 040812 and 040916. We find strong evidence that XRF 020903 (z=0.25) was...
Cluster AgeS Experiment (CASE): Detection of a dwarf nova in the globular cluster M55 (2005)
Kaluzny, J., Pietrukowicz, P., Thompson, I. B., Krzeminski, W., Schwarzenberg-Czerny, A., Pych, W., ...
We report the detection of a dwarf nova (DN) in the core region of the globular cluster M55. Six outbursts were observed during 8 observing seasons spanning the period 1997-2004. The variable has an...
The Discovery of the Optical and Near-IR Afterglows of the First Swift Gamma-Ray Bursts (2005)
Berger, E., Fox, D. B., Kulkarni, S. R., Krzeminski, W., Soderberg, A. M., Frail, D. A., ...
We present optical and near-infrared searches for afterglow emission from the first four Swift bursts with accurate positions from the X-ray Telescope (XRT). Using telescopes at Las Campanas, Keck,...
Afterglows, redshifts, and properties of swift gammaray bursts (2005)
Berger, E., Kulkarni, S. R., Fox, D. B., Soderberg, A. M.., Harrison, F. A., Nakar, E., ...
We present optical, near-IR, and radio follow-up of 16 Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, supplemented by data from...
Krisciunas, Kevin, Suntzeff, Nicholas B., Phillips, Mark M., Candia, Pablo, Prieto, Jose Luis, Antezana, R., ...
We present optical and/or infrared photometry of the Type Ia supernovae SN 1991T, SN 1991bg, SN 1999ek, SN 2001bt, SN 2001cn, SN 2001cz, and SN 2002bo. All but one of these supernovae have decline...
Cluster AgeS Experiment. Catalog of Variable Stars in the Globular Cluster Omega Centauri (2004)
Kaluzny, J., Olech, A., Thompson, I. B., Pych, W., Krzeminski, W., Schwarzenberg-Czerny, A.
We present results of a photometric survey for variable stars in the field of the globular cluster Omega Centauri. The observed region was centered roughly on the cluster core and covered 644...
Variable stars in the globular cluster NGC 3201. I. Multimode SX Phe-type variables (2003)
Mazur, B., Krzeminski, W., Thompson, I. B.
We report on the discovery of eleven multimode SX Phoenicis--type blue stragglers in the field of the southern globular cluster NGC 3201. In these variables both radial and non-radial modes are...
Photometry and Spectroscopy of Eclipsing Binaries in omega Centauri (2001)
Kaluzny, J., Thompson, I., Krzeminski, W., Olech, A ., Pych, W., Mochejska, B.
Detached eclipsing double line spectroscopic binaries are accurate distance indicators. They can be used for the direct determination of distances to globular clusters in which such systems can be...
Thompson, I. B., Kaluzny, J., Pych, W., Burley, G., Krzeminski, W., Paczynski, B., ...
We use masses, radii, and luminosities of the detached eclipsing binary OGLEGC17 derived from photometric and spectroscopic observations to calculate the age and distance of the globular cluster...
Clusters AgeS Experiment. RR Lyr Variables in the Globular Cluster NGC 6362 (2000)
Olech, A., Kaluzny, J., Thompson, I. B., Pych, W., Krzeminski, W., Schwarzenberg-Czerny, A.
We present V and B-band CCD photometry of 35 RR Lyr stars in the southern hemisphere globular cluster NGC 6362. Fourier decomposition of the light curves was used to estimate the basic properties of...
RR Lyrae Variables in the Globular Cluster M5 (2000)
Kaluzny, J., Olech, A., Thompson, I., Pych, W., Krzeminski, W., Schwarzenberg-Czerny, A.
We present V-band CCD photometry of 65 RR Lyr variables from the globular cluster M5. We have estimated the basic physical parameters for 16 RRc stars and 26 RRab stars using a Fourier decomposition...
A photometric survey for variable stars in the globular cluster M5 (1999)
Kaluzny, J., Thompson, I., Krzeminski, W., Pych, W.
We present the results of a photometric survey for variable stars in the nearby globular cluster M5. A 14.8x22.8 arcmin^2 field centered on the cluster was monitored for a total of 37 hours with a...
Olech, A., Kaluzny, J., Thompson, I. B., Pych, W., Krzeminski, W., Schwarzenberg-Czerny, A.
We present the results of a photometric study of RR Lyrae variables in the field of the globular cluster M55. We have discovered nine new RR Lyrae stars, increasing the number of known variables in...
A New System of Faint Near-Infrared Standard Stars (1998)
S. E. Persson, D. C. Murphy, W. Krzeminski, M. Roth, M. J. Rieke
A new grid of 65 faint near-infrared standard stars is presented. They are spread around the sky, lie between 10th and 12th mag at K, and are measured to precisions better than 0.005 mag in the J, H,...
BVI CCD Photometry of the Globular Cluster 47 Tuc (1998)
Kaluzny, J., Wysocka, A., Stanek, K. Z., Krzeminski, W.
We present $BVI$ photometry for about 16000 stars from a 220 arcmin$^{2}$ field centered 8 arcmin east of the center of 47 Tuc. We have identified eight likely blue stragglers located in the outer...
Kaluzny, J., Kubiak, M., Szymanski, M., Udalski, A., Krzeminski, W., Mateo, M., ...
Five fields located close to the center of the globular cluster NGC 104=47 Tuc were surveyed in a search for variable stars. We present V-band light curves for 42 variables. This sample includes 13...
Udalski, A., Olech, A., Szymanski, M., Kaluzny, J., Kubiak, M., Mateo, M., ...
We present the fifth part of the OGLE Catalog of Periodic Variable Stars in the Galactic bulge. 574 variable stars: 44 pulsating, 369 eclipsing and 161 miscellaneous type were detected in four fields...
Modelling the Galactic Bar Using Red Clump Giants (1996)
Stanek, K. Z., Udalski, A., Szymanski, M., Kaluzny, J., Kubiak, M., Mateo, M., ...
The color-magnitude diagrams of $\sim 7 \times 10^5$ stars obtained for 12 fields across the Galactic bulge with the OGLE project reveal a well-defined population of bulge red clump giants. We find...
Szymanski, M., Udalski, A., Kubiak, M., Kaluzny, J., Mateo, M., Krzeminski, W.
This paper presents the first part of the Optical Gravitational Lensing Experiment (OGLE) General Catalog of Stars in the Galactic bulge. The Catalog is based on observations collected during the...
Kaluzny, J., Kubiak, M., Szymanski, M., Udalski, A., Krzeminski, W., Mateo, M., ...
Three fields located close to the center of the globular cluster Omega Cen were surveyed in a search for variable stars. We present V-band light curves for 32 periodic variables. This sample includes...
Kaluzny, J., Kubiak, M., Szymanski, M., Udalski, A., Krzeminski, W., Mateo, M.
Three fields covering the central part of the globular cluster Omega Cen were surveyed in a search for variable stars. We present V-band light curves for 22 periodic variables: 9 SX~Phe stars, 7...
Modelling the Galactic Bar Using Red Clump Stars (1995)
Stanek, K. Z., Mateo, M., Udalski, A., Szymanski, M., Kaluzny, J., Kubiak, M., ...
The color-magnitude diagrams of $\sim 1 \times 10^6$ stars obtained for 19 fields towards the Galactic bulge with the OGLE project reveal a well-defined population of bulge red clump stars. We found...
Kaluzny, J., Kubiak, M., Szymanski, M., Udalski, A., Krzeminski, W., Mateo, M.
Extensive monitoring of the central part of Omega Cen has lead to the discovery of 12 eclipsing binaries and 9 SX~Phe stars. We report also finding 6 contact binaries in the field of 47~Tuc.
UDALSKI, A., SZYMANSKI, M., KALUZNY, J., KUBIAK, M., MATEO, M., KRZEMINSKI, W.
We present the second part of the OGLE Catalog of Periodic Variable Stars in the Galactic bulge. 800 variable stars found in four Baade's Window fields BW1, BW2, BW3 and BW4 are presented. Among them...
UDALSKI, A., KUBIAK, M., SZYMANSKI, M., KALUZNY, J., MATEO, M., KRZEMINSKI, W.
This paper is the first part of the Catalog of Periodic Variable Stars in the Galactic bulge. The Catalog is based on observations collected during the OGLE microlensing search. 213 periodic variable...
Szymanski, M., Udalski, A., Kaluzny, J., Kubiak, M., Krzeminski, W., Mateo, M.
We present follow-up observations of a gravitational microlensing candidate found by the MACHO collaboration in the Galactic bulge. The photometric data cover a period near the maximum of the event...
Kaluzny, J., Kubiak, M., Szymanski, M., Udalski, A., Krzeminski, W., Mateo, M.
The central area of the Sculptor dwarf galaxy was surveyed for variable stars as a side-program of the OGLE project. Light curves in the V band were obtained for 226 RR Lyr stars and for 3 anomalous...
Results from the Optical Gravitational Lensing Experiment (OGLE) (1994)
Paczynski, B., Stanek, K. Z., Udalski, A., Szymanski, M., Kaluzny, J., Kubiak, M., ...
The analysis of the first three years of the OGLE data revealed 12 microlensing events of the Galactic bulge stars, with the characteristic time scales in the range $ 8.6 < t_0 < 80 $ days, where $...
Evidence for the Galactic Bar from the Two Color Photometry of the Bulge Red Clump Stars (1994)
Stanek, K. Z., Mateo, M., Udalski, A., Szymanski, M., Kaluzny, J., Kubiak, M., ...
The Optical Gravitational Lensing Experiment (OGLE, Udalski et al.~1994a; Paczy\'nski et al.~1994b -- these proceedings; and references therein) is an extensive photometric search for the rare cases...
Mateo, Mario, Udalski, A., Szymanski, M., Kaluzny, J., Kubiak, M., Krzeminski, W.
We present deep CCD photometry of a field in the newly discovered dwarf spheroidal galaxy in Sagittarius (hereafter Sgr), and of a nearby control field. These data (totaling ~3.5 hrs exposure time in...
The Optical Gravitational Lensing Experiment. the Early Warning System (1994)
Udalski, A., Szymanski, M., Kaluzny, J., Kubiak, M., Mateo, M., Krzeminski, W., ...
The discoveries of 17 microlensing event candidates have been reported over the last year by three teams conducting unprecedented mass photometric searches in the direction of the Galactic bulge and...
Udalski, A., Szymanski, M., Mao, S., Di Stefano, R., Kaluzny, J., Kubiak, M., ...
We present the light curve of an unusual variable object, OGLE #7, detected during the OGLE search for microlensing events. After one season of being in a low, normal state, the star brightened by...
The Optical Depth to Gravitational Microlensing in the Direction of the Galactic Bulge (1994)
Udalski, A., Szymanski, M., Stanek, K. Z., Kaluzny, J., Kubiak, M., Mateo, M., ...
We present the analysis of the first two years of the OGLE search for gravitational lenses towards the Galactic bulge. We detected 9 microlensing events in an algorithmic search of $ \sim 10^8 $...
Are the Ogle Microlenses in the Galactic Bar? (1994)
Paczynski, B., Stanek, K. Z., Udalski, A., Szymanski, M., Kaluzny, J., Kubiak, M., ...
The analysis of the first two years of OGLE data revealed 9 microlensing events of the galactic bulge stars, with the characteristic time scales in the range $ 8.6 < t_0 < 62 $ days, where $ t_0 =...
Afterglows, redshifts, and properties of Swift gamma-ray bursts
Berger, E, Kulkarni, SR, Fox, DB, Soderberg, AM, Harrison, FA, Nakar, E, ...
We present optical, near-IR, and radio follow-up of 16 Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, supplemented by data from...