The SNR for the pixel centred on PSR J0901−4046 for each 10 s integration an a 1-hour long ASKAP observation. Pink vertical lines indicate pulses above a 3.4σ significance (shown by the dashed red line), and grey vertical lines indicate expected pulse arrival times. Sub-second pulses from this ultra-long period pulsar are bright enough they can be detectable in a 10-second correlator integration time.

A radio source with a period of 75.88 s, suspected of being an ultra-long period pulsar, was discovered in 2020 with the MeerKAT radio telescope. Lenc et al. report the detection of radio pulses from this object in multi-epoch ASKAP image data at frequencies between 744 MHz and 1800 MHz and a search for pulses made in Murchison Widefield Array data at 154 MHz. The ASKAP detections pre-date and extend other published observations and so support the belief the pulsar emission has been persistent. The non-detection of the pulsar in MWA data is consistent with a recent report that the spectrum turns over at low frequencies. An ASKAP image of the field centred at 943 MHz confirms the MeerKAT detection of diffuse emission surrounding the pulsar. The image above shows the signal-to-noise ratio for the pixel centred on PSR J0901−4046 for each 10 s integration in a 1 hr long ASKAP observation in October 2025. Pink vertical lines indicate pulses above a 3.4σ significance (shown by the dashed red line), and grey vertical lines indicate expected pulse arrival times. Sub-second pulses from this ultra-long period pulsar are bright enough that they can be detected in a 10-second correlator integration time.