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HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0358

Magnetism in Spicules

plan term


@ @


 name : Castellanos Duran, Lagg @  e-mail : castellanos[at]mps.mpg.de, lagg[at]mps.mpg.de

contact person in HINODE team

 name : Savage, Watanabe, De Pontieu @  e-mail : sabrina.savage[at]nasa.gov, watanabe[at]uvlab.mtk.nao.ac.jp, bdp[at]lmsal.com

 abstract of observational proposal
Main Objective: The magnetism and dynamics of spicules

Scientific Justification: Spicules may play an important role in the heating of the corona and in powering the solar wind (De Pontieu et al. 2007, 2017). Currently, the dynamics of these structures is well-known (e.g., Rouppe van der Voort et al. 2009, Pereira et al. 2012), and the MHD simulations have shown substantial advances in understanding their origin (e.g., Mart'inez-Sykora et al. 2017). However, the magnetic structure inside spicules is still poorly understood (e.g., Trujillo Bueno et al. 2005, Orozco Suarez et al. 2015). Due to projection effects, the counterpart of spicules on-disk is still under debate (Rouppe van der Voort et al., 2015). The lack of information of the magnetism inspicules is mainly because the high observational requirements needed to study these phenomena. The fast new cameras installed in the 1.5 m GREGOR telescope (GRIS+) overcome these difficulties, opening a new generation of studies of the magnetic structure of solar spicules. GRIS+ will for the first time allow for diffraction limited spectro-polarimetric observations in the He 10830 line with unprecedented signal-to-noise ratio and therefore complement the IRIS and Hinode spicule observations ideally.

 request to SOT
- Observable:
*Ca H at 396.8 mn.
*FoV: 55"x55", summing 1x1 (0.054" pixel).
*Cadence: 4.8 sec
*Duration 40 minutes per position on disk.
- Pointing:
*equator: mu=0.0 (limb); 0.1; 0.2; 0.4.
*lat=45 deg: mu=0.0 (limb).
*pole: mu=0.0 (limb).
-Estimate of the total data volume: 180 Mb x 6 positions = 1080 Mb.

 request to XRT

 request to EIS

 other participating instruments
"normal datarate":
3600259403 | Large sit-and-stare 0.3x120 1s Si IV Mg II h/k Deep x8 FUV spectr | 18.99 | 28.41 | 1.0 | 9.6+/-0.2 | 9.6+/-0.2 | 0.0+/-0.0 | 19.0+/-0.0 | 19.0+/-0.0 | 0.0+/-0.0

- Low telemetry:
3600259402 | Medium sit-and-stare 0.3x60 1s Si IV Mg II h/k Deep x8 FUV spectr | 18.89 | 12.15 | 0.4 |9.5+/-0.2 | 9.5+/-0.2 | 0.0+/-0.0 | 18.9+/-0.0 | 18.9+/-0.0 | 0.0+/-0.0

- Roll angle of the slit 0 (perpendicular to the solar limb at the equator).

- Pointing:
*equator: mu=0.0 (limb); 0.1; 0.2; 0.4.
*lat=45 deg: mu=0.0 (limb).
*pole: mu=0.0 (limb).

- Duration each pointing: 40 minutes.


Dates: June 4 to June 13, 2018. Duration of the allocated campaign at GREGOR observatory. At least six days due to the chances of having good conditions at GREGOR are too low otherwise.

Time window: 08:00-12:00 UT

Target(s) of interest: Solar spicules on the limb and near to the limb. The science case in not a target of opportunity.

Previous HOP information: The PI has not previously presented an IHOP.

Additional Remarks:
The PI will inform HINODE and IRIS teams about the local weather conditions at GREGOR.

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