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HINODE Operation Plan (HOP)

accepted on

18-dec-2025

 HOP No.

  HOP title

HOP 0518
[SOOP: Filaments] Filament plasma energisation

plan term

2026/02/14-2026/02/14
2026/03/01-2026/03/01

 　 　

proposer

  name : enkins, Kucera, Parenti 　  e-mail : jack.jenkins[at]esa.int, therese.a.kucera[at]nasa.gov, susanna.parenti[at]universite-paris-saclay.fr

contact person in HINODE team

  name : Marc DeRosa/Dick Shine (LMSAL), XRT -- Katharine Reeves/Paola Testa (SAO), EIS -- Sarah Matthews/Len Culhane (UCL/MSSL) 　  e-mail :

 abstract of observational proposal
Main Objective: Capture observational markers of filament thermodynamic and radiative heating

Scientific Justification: Solar Filaments are connected to the lower solar atmosphere by means of their hosting magnetic field. Hence, alongside radiative processes, energetic and transient evolutions within the photosphere and chromosphere must leave their imprint on the spectroscopic properties of filament plasma (heating, oscillation, etc.). It is our objective to identify these markers on the smallest scales and attibute them to explicit dynamics via their direct confrontation with numerical models and the necessary, rapidly maturing radiative transfer tools. This is a timely request as Solar Orbiter has scheduled a suitable SOOP to explore these objectives, and the various Hinode instruments explore the complimentary diagnostics necessary to accurately characterise the dynamics of interest.

 request to SOT
SQT-SP normal map repeated as many times as possible during the observing period to isolate the evolution of the magnetic field along the polarity inversion line.

 request to XRT
SQT-SP normal map repeated as many times as possible during the observing period to isolate the evolution of the magnetic field along the polarity inversion line.

 request to EIS
We request that a single co-alignment run be carried out at the start of the observing period. For this co-alignment we suggest EIS Study 353 (Heavily compressed (Q=50) slot context raster 488" x 488" 3.5 mins). After this we would change to EIS Study - 383 and continue to run this throughout the observation period. The requested observing window will ideally consist of at least 20 runs of EIS Study - 383. Finally a single run of EIS Study 353 to again provide context imagery for co-alignment purposes, if sufficient time is available.

 other participating instruments
IRIS requests:
Proposal submitted and accepted by IRIS team - received feedback on proposed configuration: OBS 3420259332: Medium coarse 8-step raster - reviewed and confirmed by IRIS team

Additional instrument coordination:
Solar Orbiter:
SOOP: R_BOTH_HRES_HCAD_Filaments: RS25
SOOP: R_BOTH_HRES_HCAD_Filaments: RS26

BBSO coordination requested - provisionally approved depending on state of telescope given ongoing renovations.

 remarks
Dates: 14th of February and 1st March 2026

Time window:
- 14th February (17:00 - 01:00 UT)
- 1st March (21:00 - 05:00 UT) for coordination with scheduled Solar Orbiter SOOP. Iterruptions for synoptics are permitted - provided this does not happen frequently.

Target(s) of interest: Filament footpoint in proximity to AR (not inside, consider the 'intermediate' class as defined by Mackay et al 2010.) so as to ensure low-altitude. If no intermediate class is available, filament internal to an AR will instead be chosen. To be coordinated according to Solar Orbiter PDM page. This is not a TOO.

Previous HOPs: HOP 0337 - no output

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