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Eppur non si trovano: Comments on the Primordial Black Hole Limits in the Galactic Halo
P. Mróz, A. Udalski, M. K. Szymański +13
In a recent arXiv post, Hawkins & Garcia-Bellido raised doubts on the results of 20-yr long OGLE photometric monitoring, which did not find a large number of gravitational microlen…
Limits on planetary-mass primordial black holes from the OGLE high-cadence survey of the Magellanic Clouds
Przemek Mróz, Andrzej Udalski, Michał K. Szymański +11
Observations of the Galactic bulge revealed an excess of short-timescale gravitational microlensing events that are generally attributed to a large population of free-floating or w…
The Magellanic Quasars Survey. III. Spectroscopic Confirmation of 758 AGNs Behind the Magellanic Clouds
Szymon Kozlowski, Christopher A. Onken, Christopher S. Kochanek +12
The Magellanic Quasars Survey (MQS) has now increased the number of quasars known behind the Magellanic Clouds by almost an order of magnitude. All survey fields in the Large Magel…
The Magellanic Quasars Survey. II. Confirmation of 144 New Active Galactic Nuclei Behind the Southern Edge of the Large Magellanic Cloud
Szymon Kozlowski, C. S. Kochanek, A. M. Jacyszyn +9
We quadruple the number of quasars known behind the Large Magellanic Cloud (LMC) from 55 (42 in the LMC fields of the third phase of the Optical Gravitational Lensing Experiment (O…