TY - JOUR
T1 - Radio transients and variables in the tenth Deeper, Wider, Faster observing run
AU - Dobie, D.
AU - Pritchard, J.
AU - Wang, Y.
AU - Graham, L. W.
AU - Freeburn, J.
AU - Qiu, H.
AU - White, T. R.
AU - O'Brien, A.
AU - Lenc, E.
AU - Leung, J. K.
AU - Lynch, C.
AU - Murphy, Tara
AU - Stewart, A. J.
AU - Wang, Z.
AU - Zic, A.
AU - Abbott, T. M. C.
AU - Cai, C.
AU - Cooke, J.
AU - Dobiecki, M.
AU - Goode, S.
AU - Jia, S.
AU - Li, C.
AU - Möller, A.
AU - Webb, S.
AU - Zhang, J.
AU - Zhang, S. N.
PY - 2023/3/1
Y1 - 2023/3/1
N2 - The Deeper, Wider, Faster (DWF) program coordinates observations with telescopes across the electromagnetic spectrum, searching for transients on time-scales of milliseconds to days. The tenth DWF observing run was carried out in near real-Time during September 2021, and consisted of six consecutive days of observations of the NGC 6744 galaxy group and a field containing the repeating fast radio burst FRB 190711 with the Australian Square Kilometre Array Pathfinder, the Dark Energy Camera, the Hard X-ray Modulation Telescope, and the Parkes 64-m 'Murriyang' radio telescope. In this work, we present the results of an image-domain search for transient, variable, and circularly polarized sources carried out with ASKAP, using data from the observing run along with test observations prior to the run and follow-up observations carried out during and after the run. We identified eight variable radio sources, consisting of one pulsar, six stellar systems (five of which exhibit circularly polarized emission), and one previously uncatalogued source. Of particular interest is the detection of pulses from the ultra-cool dwarf SCR J1845-6357 with a period of 14.2 ± 0.3 h in good agreement with the known optical rotation period, making this the slowest rotating radio-loud ultra-cool dwarf discovered.
AB - The Deeper, Wider, Faster (DWF) program coordinates observations with telescopes across the electromagnetic spectrum, searching for transients on time-scales of milliseconds to days. The tenth DWF observing run was carried out in near real-Time during September 2021, and consisted of six consecutive days of observations of the NGC 6744 galaxy group and a field containing the repeating fast radio burst FRB 190711 with the Australian Square Kilometre Array Pathfinder, the Dark Energy Camera, the Hard X-ray Modulation Telescope, and the Parkes 64-m 'Murriyang' radio telescope. In this work, we present the results of an image-domain search for transient, variable, and circularly polarized sources carried out with ASKAP, using data from the observing run along with test observations prior to the run and follow-up observations carried out during and after the run. We identified eight variable radio sources, consisting of one pulsar, six stellar systems (five of which exhibit circularly polarized emission), and one previously uncatalogued source. Of particular interest is the detection of pulses from the ultra-cool dwarf SCR J1845-6357 with a period of 14.2 ± 0.3 h in good agreement with the known optical rotation period, making this the slowest rotating radio-loud ultra-cool dwarf discovered.
KW - polarization
KW - radio continuum: stars
KW - radio continuum: Transients
KW - stars: flare
KW - stars: low-mass
UR - http://www.scopus.com/inward/record.url?scp=85164840599&partnerID=8YFLogxK
U2 - 10.1093/mnras/stac3731
DO - 10.1093/mnras/stac3731
M3 - Article
AN - SCOPUS:85164840599
SN - 0035-8711
VL - 519
SP - 4684
EP - 4698
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -