K. Kruszyńska
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View article: Classifying Microlensing Events from ROME/REA
Classifying Microlensing Events from ROME/REA Open
The Roman Galactic Bulge Time Domain Survey will complete our census of free-floating and bound exoplanets by detecting microlensing events from timeseries photometry. But the literature on classifying microlensing events is limited compar…
View article: AT2021uey: A planetary microlensing event outside the Galactic bulge
AT2021uey: A planetary microlensing event outside the Galactic bulge Open
We report the analysis of a planetary microlensing event AT2021uey. The event was observed outside the Galactic bulge and alerted both space-( Gaia ) and ground-based (ZTF and ASAS-SN) surveys. From the observed data, we find that the lens…
View article: Uncovering the invisible: A study of Gaia18ajz, a candidate black hole revealed by microlensing
Uncovering the invisible: A study of Gaia18ajz, a candidate black hole revealed by microlensing Open
Context. Identifying black holes is essential for our understanding of the development of stars and can reveal novel principles of physics. Gravitational microlensing provides an exceptional opportunity to examine an undetectable populatio…
View article: Analysis of the Full Spitzer Microlensing Sample. I. Dark Remnant Candidates and Gaia Predictions
Analysis of the Full Spitzer Microlensing Sample. I. Dark Remnant Candidates and Gaia Predictions Open
In the pursuit of understanding the population of stellar remnants within the Milky Way, we analyze the sample of ∼950 microlensing events observed by the Spitzer Space Telescope between 2014 and 2019. In this study we focus on a subsample…
View article: Analysis of the full Spitzer microlensing sample I: Dark remnant candidates and Gaia predictions
Analysis of the full Spitzer microlensing sample I: Dark remnant candidates and Gaia predictions Open
In the pursuit of understanding the population of stellar remnants within the Milky Way, we analyze the sample of $\sim 950$ microlensing events observed by the Spitzer Space Telescope between 2014 and 2019. In this study we focus on a sub…
View article: Gaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-velocity Characterization
Gaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-velocity Characterization Open
We report discovering an exoplanet from following up a microlensing event alerted by Gaia. The event Gaia22dkv is toward a disk source rather than the traditional bulge microlensing fields. Our primary analysis yields a Jovian planet with …
View article: Synergies between Roman Galactic Plane Survey and other major surveys
Synergies between Roman Galactic Plane Survey and other major surveys Open
Nancy Grace Roman Space Telescope will revolutionize our understanding of the Galactic Bulge with its Galactic Bulge Time Domain survey. At the same time, Rubin Observatories's Legacy Survey of Space and Time (LSST) will monitor billions o…
View article: A close binary lens revealed by the microlensing event Gaia20bof
A close binary lens revealed by the microlensing event Gaia20bof Open
During the last 25 years, hundreds of binary stars and planets have been discovered towards the Galactic Bulge by microlensing surveys. Thanks to a new generation of large-sky surveys, it is now possible to regularly detect microlensing ev…
View article: Uncovering the Invisible: A Study of Gaia18ajz, a Candidate Black Hole Revealed by Microlensing
Uncovering the Invisible: A Study of Gaia18ajz, a Candidate Black Hole Revealed by Microlensing Open
Identifying black holes is essential for comprehending the development of stars and uncovering novel principles of physics. Gravitational microlensing provides an exceptional opportunity to examine an undetectable population of black holes…
View article: Dark lens candidates from Gaia Data Release 3
Dark lens candidates from Gaia Data Release 3 Open
Gravitational microlensing is a phenomenon that allows us to observe dark remnants of stellar evolution even if they no longer emit electromagnetic radiation. In particular, it can be useful to observe solitary neutron stars or stellar-mas…
View article: MOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert
MOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert Open
We analyze the MOA-2020-BLG-208 gravitational microlensing event and present the discovery and characterization of a new planet, MOA-2020-BLG-208Lb, with an estimated sub-Saturn mass. With a mass ratio , the planet lies …
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. Gaia has been in operations since 2014, and two full data releases (DR) have been delivered so far: DR1 in 2016 and DR2 in 2018. The third Gaia data release expands from the early data release (EDR3) in 2020, which contained the f…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. Gaia DR3 contains 1.8 billion sources with G -band photometry, 1.5 billion of which with G BP and G RP photometry, complemented by positions on the sky, parallax, and proper motion. The median number of field-of-view transits in t…
View article: Gaia Data Release 3: All-sky classification of 12.4 million variable sources into 25 classes
Gaia Data Release 3: All-sky classification of 12.4 million variable sources into 25 classes Open
Gaia DR3 contains 1.8 billion sources with G-band photometry, 1.5 billion of which with BP and RP photometry, complemented by positions on the sky, parallax, and proper motion. The median number of field-of-view transits in the three photo…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. In current astronomical surveys with ever-increasing data volumes, automated methods are essential. Objects of known classes from the literature are necessary to train supervised machine-learning algorithms and to verify and valid…
View article: A possible nearby microlensing stellar remnant hiding in <i>Gaia</i> DR3 astrometry
A possible nearby microlensing stellar remnant hiding in <i>Gaia</i> DR3 astrometry Open
Massive galactic lenses with large Einstein Radii should cause a measurable astrometric microlensing effect, that is, a light centroid shift due to the motion of the two images. Such a shift in the position of a background star due to micr…
View article: Is there a nearby microlensing stellar remnant hiding in Gaia DR3 astrometry?
Is there a nearby microlensing stellar remnant hiding in Gaia DR3 astrometry? Open
Massive galactic lenses with large Einstein Radii should cause a measurable astrometric microlensing effect, i.e. the light centroid shift due to the motion of the two images. Such a shift in the position of a background star due to microl…
View article: Lens parameters for <i>Gaia</i>18cbf – a long gravitational microlensing event in the Galactic plane
Lens parameters for <i>Gaia</i>18cbf – a long gravitational microlensing event in the Galactic plane Open
Context. The timescale of a microlensing event scales as a square root of a lens mass. Therefore, long-lasting events are important candidates for massive lenses, including black holes. Aims. Here, we present the analysis of the Gaia 18cbf…
View article: Single-lens mass measurement in the high-magnification microlensing event Gaia19bld located in the Galactic disc
Single-lens mass measurement in the high-magnification microlensing event Gaia19bld located in the Galactic disc Open
We present the photometric analysis of Gaia19bld, a high-magnification ($A\approx60$) microlensing event located in the southern Galactic plane, which exhibited finite source and microlensing parallax effects. Due to a prompt detection by …
View article: Lens parameters for Gaia18cbf -- a long gravitational microlensing event in the Galactic plane
Lens parameters for Gaia18cbf -- a long gravitational microlensing event in the Galactic plane Open
Context: The timescale of a microlensing event scales as a square root of a lens mass. Therefore, long-lasting events are important candidates for massive lenses, including black holes. Aims: Here we present the analysis of the Gaia18cbf m…
View article: A spectroscopic follow-up for Gaia19bld
A spectroscopic follow-up for Gaia19bld Open
Context. Due to their scarcity, microlensing events in the Galactic disk are of great interest and high-cadence photometric observations, supplemented by spectroscopic follow-up, are necessary for constraining the physical parameters of th…
View article: <i>Gaia</i> Early Data Release 3
<i>Gaia</i> Early Data Release 3 Open
Context. Since July 2014, the Gaia mission has been engaged in a high-spatial-resolution, time-resolved, precise, accurate astrometric, and photometric survey of the entire sky. Aims. We present the Gaia Science Alerts project, which has b…
View article: Gaia Photometric Science Alerts
Gaia Photometric Science Alerts Open
Since July 2014, the Gaia mission has been engaged in a high-spatial-resolution, time-resolved, precise, accurate astrometric, and photometric survey of the entire sky. Aims: We present the Gaia Science Alerts project, which has been in op…
View article: Gaia18aen: First symbiotic star discovered by <i>Gaia</i>
Gaia18aen: First symbiotic star discovered by <i>Gaia</i> Open
Context. Besides the astrometric mission of the Gaia satellite, its repeated and high-precision measurements also serve as an all-sky photometric transient survey. The sudden brightenings of the sources are published as Gaia Photometric Sc…
View article: OGLE-ing the Magellanic System: RR Lyrae Stars in the Bridge*
OGLE-ing the Magellanic System: RR Lyrae Stars in the Bridge* Open
We use the extended and updated Optical Gravitational Lensing Experiment (OGLE) Collection of Variable Stars to thoroughly analyze the distribution of RR Lyrae stars in the Magellanic Bridge. We use photometric metallicities to derive the …