非表示:
キーワード:
Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
要旨:
The magnetar SGR 1935+2154 is the only known Galactic source of fast radio
bursts (FRBs). FRBs from SGR 1935+2154 were first detected by CHIME/FRB and
STARE2 in 2020 April, after the conclusion of the LIGO, Virgo, and KAGRA
Collaborations' O3 observing run. Here we analyze four periods of gravitational
wave (GW) data from the GEO600 detector coincident with four periods of FRB
activity detected by CHIME/FRB, as well as X-ray glitches and X-ray bursts
detected by NICER and NuSTAR close to the time of one of the FRBs. We do not
detect any significant GW emission from any of the events. Instead, using a
short-duration GW search (for bursts $\leq$ 1 s) we derive 50\% (90\%) upper
limits of $10^{48}$ ($10^{49}$) erg for GWs at 300 Hz and $10^{49}$ ($10^{50}$)
erg at 2 kHz, and constrain the GW-to-radio energy ratio to $\leq 10^{14} -
10^{16}$. We also derive upper limits from a long-duration search for bursts
with durations between 1 and 10 s. These represent the strictest upper limits
on concurrent GW emission from FRBs.