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HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0352

Polar jet hunting with ALMA

plan term


@ @


 name : Shimojo @  e-mail : masumi.shimojo[at]nao.ac.jp

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:
Polar coronal holes are an important source of fast solar wind. X-ray observations with the Hinode satellite have shown that solar X-ray jets frequently occur in polar coronal holes, and they are garnering attention because they might supply material to, and drive disturbances in, the fast solar wind. Recently, it has been found that most of solar X-ray jets are associated with the eruption of small filaments composed of relatively cool plasma. This raises the possibility erupting filaments supply a significant amount of mass to the fast solar wind. We have developed a method for estimating the mass of cool plasma from the data in mm-wave/UV/EUV/X-rays emission and have succeeded in obtaining the mass of cool plasma erupted from an X-ray bright point. Here we request the joint observations of ALMA-Hinode-IRIS for hunting polar jets in polar coronal holes, in order to estimate the mass contributed by associated cool erupting filaments to the fast solar wind.

Scientific Justification:
To hunt polar jets, we use the observing plan for HOP81. The HOP81 is very suitable for observing polar jets, and its observing program has already been proofed by monthly observations.

 request to SOT
It is the same as HOP81.
Remember to use a margin factor of 1.4.

FoV 320" x 164", Pixel size: 0.32"/pix, Binning: 2x2, Single side mode
Exposure: 4.8 sec (6 Cycles), JPEG Quality: Q75, Data rate: 600Mbits/map

Note: Run at least 2 maps during (and extending after) the ALMA observing period

 request to XRT
It is the same as HOP81.

FoV 384 pix x 384 pix, Binning: 1 x 1, Time resolution: < 1 min.
Exposure time: 16.34 sec, JPEG Quality: Q75
Data rate: 7.6 Mbits/h (one image/1 min)

 request to EIS

 other participating instruments
ALMA: #72
High data rate:
3620259762 | Very large coarse 64-step raster 126x175 64s Mg II h/k Deep x 8 FUV | 610.88 | 1255.59 | 1.4 | 9.5+/-0.0 | 611+/-0 | 0.0+/-0.0 | 0.0+/-0.0 | 9.5+/-0.0 | 0.0+/

Low datarate:
3620109762 | Very large coarse 64-step raster 126x175 64s Mg II h/k Deep x 8 Spati | 596.93 | 410.37 | 0.5 | 9.3+/-0.0 | 597+/-0 | 0.0+/-0.0 | 0.0+/-0.0 | 9.3+/0.0 | 0.0+/-0.0

Dates: Solar observations with ALMA in Cycle 5 will be carried out in April 2018. The exact date of my observation is not fixed yet. I will send you the date & time when I receive the observing date from ALMA observatory.

Time window: The total observing duration of my ALMA observation is 6 hours. I hope that Hinode supports the observing time.

Target(s) of interest: Jets occurred in polar coronal hole.

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