Page 19

Looking for fast radio bursts at optical and very high energies

gamma-ray emission was detected, neither of

However, this detection is consistent with a

a persistent nature nor burst-like associated

spurious background event. All these results

with the FRBs. These results constrain the VHE

constrain the current FRB models (see MAGIC

luminosity to be lower than 1045 and 1049 erg

Collaboration et al. 2018, MNRAS, 481, 2479).

s-1, respectively. We also constrained the optical emission in the U band to be below 8.6 mJy at 5Ďƒ confidence level for 1-ms bursts around the FRB arrival

FRB 121102 is the only Fast Radio Burst known to repeat and precisely localised. Multi-wavelength observations with Arecibo and the MAGIC telescopes have been conducted to search for possible bursts at optical wavelengths and very high-energy gamma-rays.

times. A bright (29 mJy) 12-ms optical burst was detected 4.3 s before the arrival of one FRB.

Benito Marcote (marcote@jive.eu) and Tarek Hassan (tarek.hassan@desy.de) The origin of Fast Radio Bursts (FRBs) remains unclear. The discovery of the only repeating FRB, FRB 121102, and its precise localisation (see ASTRON Summer 2017 Newsletter) allowed the astronomers to study one FRB in detail for the first time. Several scenarios predict the emission of bursts outside the radio wavelengths, such as at optical wavelengths or even gamma-rays. However, the only way to unveil if FRB 121102 exhibits bursts at other wavelengths is to conduct simultaneous sensitive observations with different facilities. We conducted observations of FRB 121102 with Arecibo and the MAGIC Telescopes during 2016 and 2017 to search for optical and very high-energy

Figure 1: Illustration of the MAGIC-II telescope observing at the arrival time of one of the radio bursts from FRB 121102 detected by the Arecibo Telescope.

(VHE; >200 GeV) gamma-rays. During these observations a total of five FRBs were detected by Arecibo. No significant VHE

ASTRON News / Winter 2018

19

ASTRON News Winter 2018  
ASTRON News Winter 2018  
Advertisement