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HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0365

Coordinated Observations Between the EUNIS-2018 Sounding Rocket and EIS

plan term


@ @


 name : Brosius, Daw, Landi @  e-mail : Jeffrey.W.Brosius[at]nasa.gov, Adrian.Daw[at]nasa.gov,ELandi[at]umich.edu

contact person in HINODE team

 name : Mariska, Warren @  e-mail : jtmariska[at]gmail.com, harry.warren[at]nrl.navy.mil

 abstract of observational proposal
Main Objective:
We propose to coordinate the EUNIS sounding rocket with EIS, IRIS, EOVSA, and IBIS during the flight scheduled for 6 November 2018.

Scientific Justification:
EUNIS contains two co-aligned multilayer telescope/spectrographs that cover spectral ranges 9.0-11.0 nm and 52.5-63.5 nm with 2-arcsec slits that extend over 11 arcmin (nearly a full solar radius). Our primary science objectives are to investigate pervasive, faint emission in lines of Fe XVIII and Fe XIX that would provide compelling evidence for the nanoflare model of solar coronal heating, and explore the relatively uncharted 9.0-11.0 nm wavelength range. This will be achieved with a sequence of fast EUNIS rasters in which the slit pointings will scan back and forth continuously within a maximum displacement of about 2 arcmin from the initial pointing. An additional EUNIS objective is to cross calibrate with EIS. This will be achieved indirectly for both EIS wavebands (17.0-20.5 nm and 25.0-29.0 nm) by comparing density- and temperature-insensitive line intensity ratios with theoretical values derived from CHIANTI.
The key to the "indirect" cross calibration is that each line pair will include one member from EIS and one member from EUNIS.

 request to SOT
One vector magnetogram of the target area, to be obtained during the sounding rocket flight.

 request to XRT
One full disk Thin-Al/Poly and one full disk Thin-Be image to be obtained during the sounding rocket flight, with one additional full disk image of each obtained between 30 and 60 minutes before the flight, and one additional full disk image of each obtained between 30 and 60 minutes after the flight.

 request to EIS
Run the newly-defined study "EUNIS_EIS_CrossCal18" three times on the EUNIS launch date: once before the rocket launch, once during the rocket flight (starting about 20 minutes before the scheduled launch), and once after the flight.

 other participating instruments
IRIS requests:
2'x2' raster, preferably including lines of C II at 1334.5 and 1335.7 A, C I 1354.3 A, O I 1355.6 A, O IV 1401.1 A, and Si IV 1402.7 A. If possible, alternate between 1330 A and 1400 A slit-jaw images. No proposal has been submitted to IRIS specifically for these observations.

EOVSA (we have contacted Dale Gary at NJIT)
IBIS (we have contacted Kevin Reardon at NSO).

Time window: Launch will likely occur close to local solar noon at the launch site of White Sands Missile Range, New Mexico, USA, so the time will likely be around 1800 UT.

Target(s) of interest: An active region and its quiet sun surroundings.
Previous HOPs:
(1) EIS study 209 (EUNIS_EIS_CrossCal; Raster ID 203; Line List ID 94; not sure if this was ever awarded full HOP status):
- "Underflight Calibration of SOHO/CDS and Hinode/EIS with EUNIS-07,"
Tongjiang Wang, R. J. Thomas, J. W. Brosius, P. R. Young, D. M. Rabin,
J. M. Davila, and G. Del Zanna, Ap. J. Sup., 197, 32 (2011 December).

(2) EIS study 472 (FLAREDOP_EIS; Raster ID 449; Line List ID 245):
- "Chromospheric Evaporation in Solar Flare Loop Strands Observed with the
Extreme-ultraviolet Imaging Spectrometer Aboard Hinode," J. W. Brosius, Ap. J., 762, 133 (2013 January 10). See EIS Nugget of November 2012.
- "Rapid Evolution of the Solar Atmosphere During the Impulsive Phase of a Microflare Observed with the Extreme-ultraviolet Imaging Spectrometer Aboard Hinode: Hints of Chromospheric Magnetic Reconnection," J. W. Brosius, Ap. J., 777, 135 (2013 November 10). See EIS Nugget of November 2013.

(3) IHOP 241
- "Quasi-Periodic Fluctuations and Chromospheric Evaporation in a Solar Flare Ribbon Observed by Hinode/EIS, IRIS, and RHESSI," J. W. Brosius, A. N. Daw, and A. R. Inglis, Ap. J., 830, 101 (2016 October 20). See EIS Nugget of December 2016.
- "Explosive Chromospheric Evaporation and Warm Rain in a C3.1 Flare Observed by IRIS, Hinode/EIS, and RHESSI," J. W. Brosius and A. R. Inglis, Ap. J., 848, 39 (2017 October 10). See EIS Nugget of February 2018.

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