n MNASSA : Monthly Notes of the Astronomical Society of South Africa - PSR J1723-2837 : intensive photometric study captured unique events

Volume 75, Issue 1_2
  • ISSN : 0024-8266



PSR J1723-2837, a 1.86 millisecond pulsar (MSP) is one of the growing populations of MSP pulsars with a non-degenerative companion star of mass 0.2 - 0.4 Mʘ , also known as Redbacks (RBs), in a ~15 hour orbital period. The presented paper reports on photometric results obtained on the ~16 magnitude companion to PSR J1723-2837. The optical light curve of the companion was intensively monitored for a period of one year.

A steady state was identified, dominated by ellipsoidal variation, a common signature to a number of RBs followed by a transitional period of asymmetric phase luminosity during 2014. Most unexpectedly was the development of a presumably asynchronous rotating spot in 2015 which was observed until the end of 2015 when observations ceased.

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