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Evolution of the transitional millisecond pulsar PSR J1023+0038 from Aqueye+ and NICER observations
Silvia Conforti, Luca Zampieri, Michele Fiori +3
Transitional millisecond pulsars (tMSPs) are old neutron stars spun up by accretion from a low-mass companion. These objects can switch between two emission regimes: rotation-power…
Investigating the origin of optical and X-ray pulsations of the transitional millisecond pulsar PSR J1023+0038
G. Illiano, A. Papitto, F. Ambrosino +21
PSR J1023+0038 is the first millisecond pulsar that was ever observed as an optical and UV pulsar. So far, it is the only optical transitional millisecond pulsar. The rotation- and…
ASTRI Mini-Array Core Science at the Observatorio del Teide
S. Vercellone, C. Bigongiari, A. Burtovoi +84
The ASTRI (Astrofisica con Specchi a Tecnologia Replicante Italiana) Project led by the Italian National Institute for Astrophysics (INAF) is developing and will deploy at the Obse…
Deep upper limit on the optical emission during a hard X-ray burst from the magnetar SGR J1935+2154
Luca Zampieri, Sandro Mereghetti, Roberto Turolla +9
In September 2021 the magnetar SGR J1935+2154 entered a stage of burst/flaring activity in the hard X-ray band. On September 10, 2021 we observed SGR J1935+2154 with the fiber-fed…
Spin-down rate of the transitional millisecond pulsar PSR J1023+0038 in the optical band with Aqueye+
Aleksandr Burtovoi, Luca Zampieri, Michele Fiori +5
We present a timing analysis of the transitional millisecond pulsar PSR J1023+0038 using observations taken between January 2018 and January 2020 with the high time resolution phot…
The lowest frequency Fast Radio Bursts: Sardinia Radio Telescope detection of the periodic FRB 180916 at 328 MHz
M. Pilia, M. Burgay, A. Possenti +35
We report on the lowest-frequency detection to date of three bursts from the fast radio burst FRB 180916, observed at 328 MHz with the Sardinia Radio Telescope (SRT). The SRT obser…
Precise optical timing of PSR J1023+0038, the first millisecond pulsar detected with Aqueye+ in Asiago
Luca Zampieri, Aleksandr Burtovoi, Michele Fiori +5
We report the first detection of an optical millisecond pulsar with the fast photon counter Aqueye+ in Asiago. This is an independent confirmation of the detection of millisecond p…
The first ultraviolet detection of the Large Magellanic Cloud pulsar PSR B0540-69 and its multi-wavelength properties
R. P. Mignani, A. Shearer, A. de Luca +9
We observed the young ( yrs) pulsar PSR B0540-69 in the near-ultraviolet (UV) for the first time with the Space Telescope Imaging Spectrograph (STIS) aboard the {\em Hub…
What brakes the Crab pulsar?
A. Čadež, L. Zampieri, C. Barbieri +4
Optical observations provide convincing evidence that the optical phase of the Crab pulsar follows the radio one closely. Since optical data do not depend on dispersion measure var…
Optical phase coherent timing of the Crab nebula pulsar with Iqueye at the ESO New Technology Telescope
L. Zampieri, A. Čadež, C. Barbieri +6
The Crab nebula pulsar was observed in 2009 January and December with a novel very fast optical photon counter, Iqueye, mounted at the ESO 3.5 m New Technology Telescope. Thanks to…
Aqueye optical observations of the Crab Nebula pulsar
C. Germanà, L. Zampieri, C. Barbieri +12
We observed the Crab pulsar in October 2008 at the Copernico Telescope in Asiago - Cima Ekar with the optical photon counter Aqueye (the Asiago Quantum Eye) which has the best temp…
The Crab pulsar seen with Aqueye at Asiago Cima Ekar Observatory
L. Zampieri, C. Germanà, C. Barbieri +9
We are developing fast photon-counter instruments to study the rapid variability of astrophysical sources by time tagging photon arrival times with unprecedented accuracy, making u…
The optical light curve of the LMC pulsar B0540-69 in 2009
S. Gradari, M. Barbieri, C. Barbieri +7
This paper reports a detailed analysis of the optical light curve of PSR B0540-69, the second brightest pulsar in the visible band, obtained in 2009 (Jan. 18 and 20, and Dec. 14, 1…