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HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0401

Coordination with SST and IRIS - Dynamics of flux cancellation in neutral lines

plan term




 name : Chintzoglou    e-mail : gchintzo[at]lmsal.com

contact person in HINODE team

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

 abstract of observational proposal
Scientific Justification: The investigation focuses on the physics of flux cancellation in neutral lines. Reconnection events along neutral lines form the photosphere to higher heights in the atmosphere are believed to be behind the formation of filament channels, the seeds of CMEs. A large number of cancellation events in coordination with SST (Halpha - looking for heating events such as Ellerman bombs) is needed to elucidate the physical processes behind the creation of filament channels.

 request to SOT
Similar to HOP330 on 2017 April 22 at 14UT, but twice as wide (i.e. 20").

 request to XRT
Active Region or Decaying AR for sigmoids at the beginning or around the time of the SOT observations  
No rapid time-sequences needed

Al-poly - 512x512

 request to EIS
High telemetry: EIS study ID #37 HH+AR_FLR_RAS_NO3J, FOV: 240" x 240", 5s exp with 2" slit - 13 min telemetry 79 kbits/s

Low telemetry: EIS Study ID #465 HH_Flare_60x152f, FOV:152x60, 4s exp with 2" slit which has 21 kbits/s.

Target: AR neutral line

Please note that we request EIS to run these two programs in the following order:
   ・Run high telemetry (large FOV) just once in the beginning of the observing window
      to obtain context and then
   ・Run low telemetry (small FOV and faster cadence) for the rest of the time.
   ・If telemetry is limited, please skip step 1.

 other participating instruments
IRIS requests:
High data rate:
3620106831  |  Very large sparse 8-step raster 7x175 8s  Si IV   Mg II h/k   Mg II w   |      41.05    |      47.07    |       0.8 |  5.1+/-0.1 | 41.1+/-0.0 |  0.0+/-0.0 | 20.5+/-0.1 | 20.6+/-0.1 | 20.5+/-0.1

Low data rate:
3620106830  |  Large sparse 8-step raster 7x120 8s  Si IV   Mg II h/k   Mg II w Deep   |      40.95    |      29.63    |       0.5 |  5.1+/-0.1 | 41.0+/-0.0 |  0.0+/-0.0 | 20.4+/-0.1 | 20.5+/-0.1 | 20.4+/-0.1


- 2023 May 3-16 : 8 - 10 UT: IHOP401 would be our primary program during this campaign (focused on AR neutral lines, unless otherwise specified). If the IHOP401 data are sufficient, we may request to to switch to IHOP402 (outflows program) for the remainder of our campaign.

- Every other day during the LMSAL shift at the SST / IRIS-SST coordination: 2020 June 4 to June 17

Time window:  8-10 UT coordinated with SST. It would be nice not to have short interruptions, if possible, to maximize coordination coverage of potentially good seeing conditions at the SST.

Target(s) of interest:  
1. TOO - Neutral line of an emerging AR.
2. TOO - Neutral line of a decaying AR / opposite polarity plage

Previous HOPs:  
HOP 0383 was submitted from the present proposer.

Additional remarks:  
We may sacrifice the cadence for an additional 20” along the x-direction, doubling it to 3.2 minutes per raster if our target is promising enough.  

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