Show simple item record

dc.contributor.authorMeyers, B.
dc.contributor.authorTremblay, S.
dc.contributor.authorBhat, Ramesh
dc.contributor.authorFlynn, C.
dc.contributor.authorGupta, V.
dc.contributor.authorShannon, Ryan
dc.contributor.authorMurray, Steven
dc.contributor.authorSobey, Charlotte
dc.contributor.authorOrd, S.
dc.contributor.authorOslowski, S.
dc.contributor.authorCrosse, B.
dc.contributor.authorWilliams, Andrew
dc.contributor.authorJankowski, F.
dc.contributor.authorFarah, W.
dc.contributor.authorKrishnan, V.
dc.contributor.authorBateman, T.
dc.contributor.authorBailes, M.
dc.contributor.authorBeardsley, A.
dc.contributor.authorEmrich, David
dc.contributor.authorFranzen, Thomas
dc.contributor.authorGaensler, B.
dc.contributor.authorHorsley, L.
dc.contributor.authorJohnston-Hollitt, M.
dc.contributor.authorKaplan, D.
dc.contributor.authorKenney, David
dc.contributor.authorMorales, M.
dc.contributor.authorPallot, D.
dc.contributor.authorSteele, K.
dc.contributor.authorTingay, Steven
dc.contributor.authorTrott, Cathryn
dc.contributor.authorWalker, M.
dc.contributor.authorWayth, Randall
dc.contributor.authorWu, C.
dc.identifier.citationMeyers, B. and Tremblay, S. and Bhat, R. and Flynn, C. and Gupta, V. and Shannon, R. and Murray, S. et al. 2018. Hunting for Radio Emission from the Intermittent Pulsar J1107-5907 at Low Frequencies. Astrophysical Journal. 869 (2): Article ID 134.

Rare intermittent pulsars pose some of the most challenging questions surrounding the pulsar emission mechanism, but typically have relatively minimal low-frequency (?300 MHz) coverage. We present the first low-frequency detection of the intermittent pulsar J1107-5907 with the Murchison Widefield Array (MWA) at 154 MHz and the simultaneous detection from the recently upgraded Molonglo Observatory Synthesis Telescope (UTMOST) at 835 MHz, as part of an ongoing observing campaign. During a 30 minute simultaneous observation, we detected the pulsar in its bright emission state for approximately 15 minutes, where 86 and 283 pulses were detected above a signal-to-noise threshold of 6 with the MWA and UTMOST, respectively. Of the detected pulses, 51 had counterparts at both frequencies and exhibited steep spectral indices for both the bright main pulse component and the precursor component. We find that the bright state pulse energy distribution is best parameterized by a log-normal distribution at both frequencies, contrary to previous results that suggested a power law distribution. Further low-frequency observations are required in order to explore in detail aspects such as pulse-to-pulse variability and intensity modulations, as well as to better constrain the signal propagation effects due to the interstellar medium and intermittency characteristics at these frequencies. The spectral index, extended profile emission covering a large fraction of pulse longitude, and the broadband intermittency of PSR J1107-5907 suggest that future low-frequency pulsar searches - for instance, those planned with SKA-Low - will be in an excellent position to find and investigate new pulsars of this type.

dc.publisherInstitute of Physics Publishing
dc.titleHunting for Radio Emission from the Intermittent Pulsar J1107-5907 at Low Frequencies
dc.typeJournal Article
dcterms.source.titleAstrophysical Journal
curtin.departmentCurtin Institute of Radio Astronomy (Physics)
curtin.accessStatusFulltext not available

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record