HOP 0375

HINODE Operation Plan (HOP)

accepted on

16-may-2019

HOP No.

HOP title

HOP 0375

Flare Ribbon and Current Sheet Instabilities During Solar Flares

proposer

name :

French, Matthews

e-mail :

ryan.french.14[at]ucl.ac.uk sarah.matthews[at]ucl.ac.uk

contact person in HINODE team

name :

Culhane, Harra

e-mail :

j.culhane[at]ucl.ac.uk
l.harra[at]ucl.ac.uk

abstract of observational proposal

Main Objective: Investigating flare ribbon sub-structure to gain insight into current sheet dynamics, in support of Swedish Solar Telescope observations.

Scientific Justification: The goal is to search for evidence of plasma instabilities in the flare current sheet through the analysis of high cadence imaging and spectroscopy of the ribbons in a small flare. We plan to combine high cadence observations from the Swedish Solar Telescope (through a target of opportunity programme) with IRIS and EIS spectroscopy to probe the detailed ribbon dynamics in the chromosphere and transition region, while EIS and XRT will provide complementary information on the coronal environment surrounding the energy release region.

other participating instruments

IRIS requests:
High datarate:
3663007702 | Medium sit-and-stare 0.3x60 1s Mg II h/k Deep x 4 SJI cadence 3x fa | 5.68 | 7.18 | 0.9 | 5.7+/-0.0 | 5.7+/-0.0 | 0.0+/-0.0 | 0.0+/-0.0 | 5.7+/-0.0 | 0.0+/-0.0

Low datarate (spectral summing x1, spatial summing x2)
3663087702 | Medium sit-and-stare 0.3x60 1s Mg II h/k Deep x 4 Spatial x 2, Spectr | 5.52 | 3.75 | 0.5 | 5.5+/-0.0 | 5.5+/-0.0 | 0.0+/-0.0 | 0.0+/-0.0 | 5.5+/-0.0 | 0.0+/-0.0

Additional instrument coordination:
SST (CRISP, CHROMIS) at La Palma

remarks

Dates: UK Observing slot on SST falls over the period of 4 July - 17 July inclusive. We have a target of opportunity observing programme within this window.

Time window: Observing times of Swedish Solar Telescope (SST) (daylight hours). No interruptions. Target(s) of interest: This is a target of opportunity observation, requiring a small flare (B or C-class) on
disk.

Previous HOPs:
N/A

Additional remarks:
Target of opportunity, for coordination with SST. We would request that Hinode and IRIS observe the region selected by SST, assuming a suitable target would be found.