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Nature of 4FGL J1838.2+3223: a flaring `spider' pulsar candidate
D. A. Zyuzin, A. Yu. Kirichenko, A. V. Karpova +4
An unidentified -ray source 4FGL J1838.2+3223 has been proposed as a pulsar candidate. We present optical time-series multi-band photometry of its likely optical companion obtai…
The black widow pulsar J1641+8049 in the optical, radio and X-rays
A. Yu. Kirichenko, S. V. Zharikov, A. V. Karpova +14
PSR J1641+8049 is a 2 ms black widow pulsar with the 2.2 h orbital period detected in the radio and -rays. We performed new phase-resolved multi-band photometry of PSR J1641+804…
Optical spectral observations of three binary millisecond pulsars
A. V. Bobakov, A. V. Karpova, S. V. Zharikov +3
We present the results of optical spectroscopy of stellar companions to three binary millisecond pulsars, PSRs J06212514, J23171439 and J23024442, obtained with the Gran T…
A new redback pulsar candidate 4FGL J2054.2+6904
A. V. Karpova, D. A. Zyuzin, Yu. A. Shibanov +1
The Fermi catalogue contains about 2000 unassociated -ray sources. Some of them were recently identified as pulsars, including so called redbacks and black widows, which are mil…