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Long-term trends of light pollution assessed from SQM measurements and an empirical atmospheric model
Johannes Puschnig, Stefan Wallner, Axel Schwope +1
We present long-term (4-10 years) trends of light pollution observed at 26 locations, covering rural, intermediate and urban sites, including the three major European metropolitan…
X-ray detection of a nova in the fireball phase
Ole König, Jörn Wilms, Riccardo Arcodia +17
Novae are caused by runaway thermonuclear burning in the hydrogen-rich envelopes of accreting white dwarfs, which results in the envelope to expand rapidly and to eject most of its…
XMM-Newton and SRG/eROSITA observations of the isolated neutron star candidate 4XMM J022141.5-735632
Adriana M. Pires, Christian Motch, Jan Kurpas +11
We report the results of follow-up investigations of a possible new thermally emitting isolated neutron star (INS), 4XMM J022141.5-735632, using observations from XMM-Newton and Sp…
Circular Polarimetry of Suspect Wind-accreting Magnetic pre-Polars
Pasi Hakala, Steven G. Parsons, Thomas R. Marsh +4
We present results from a circular polarimetric survey of candidate detached magnetic white dwarf - M dwarf binaries obtained using the Nordic Optical Telescope, La Palma. We obtai…
XMM-Newton and TESS observations of the highly variable polar V496 UMa
Samet Ok, Axel Schwope
We aim to study the temporal and spectral behaviour of \vum from the optical to the X-ray regimes. We used archival \xmmn and \tes observations obtained in 2017 and 2019 to perform…
Deep eROSITA observations of the "magnificent seven" isolated neutron stars
Adriana Mancini Pires, Axel Schwope, Jan Kurpas
We report the initial results of deep eROSITA monitoring of the "magnificent seven" isolated neutron stars (INSs). Thanks to a combination of high count statistics and good energy…