!!!Reference data-sets

This page identifies certain reference data-sets, not necessarily for science reasons but more for unusual modes that present special cases for testing analysis software.

!!Use of nexp_prp

EIS has the capability of doing multiple exposures for each slit position (keyword nexp_prp>1), but this feature has rarely been used. 

eis_l0_20091214_002533 - 100"x400" raster with two exposures of 150s at each slit position.\\
eis_l0_20070307_220220 - 10"x512" raster with two exposures of 30s and 120s

!!Slot data-sets

!40" slot raster

Slot rasters are very widely used for context data (particularly PRY_slot_context_v3 and PRY_slot_contextLITE). Repeats of slot rasters are less common.

eis_l0_20090509_182435 - 24 repeats of PRY_slot_contextLITE for AR at limb

!40" slot sit-and-stare

!266" slot raster

!266" slot sit-and-stare

!!Flare and bright point trigger studies

!!Long exposure times

The longest exposure time that has been used is 600 seconds. 

eis_l0_20130329_100736 - a 20"x512" raster run as part of HOP 226

!!Lunar eclipses

Occasionally we see lunar eclipses from Hinode, and these can be useful for studying scattered light. Note however that the Moon moves very fast in these data-sets (around 200-300 arcsec per minute). The list below is not complete.

15-Jan-2010 - see [EIS Software Note #12|http://solarb.mssl.ucl.ac.uk/SolarB/eis_docs/eis_notes/12_STRAY_LIGHT/eis_swnote_12.pdf] \\
21-Aug-2017 - [Hara (2019, ApJ)|https://ui.adsabs.harvard.edu/abs/2019ApJ...887..122H/abstract]

More information about the eclipses is available from the Hinode Daily Events page. For example, see [the page for 26-Jan-2009|http://www.isas.jaxa.jp/home/solar/hinode_op/hinode_daily_events.php?date=20090126]. To check other dates, use the same link, but change the date in the URL.

!!Venus transit

Hinode saw one Venus transit during the mission, from 5 to 6 June 2012. EIS mainly used the 40" slot, but there were two narrow slit data-sets obtained at the east and west limbs. Dave Williams prepared a [Youtube movie|http://youtu.be/P9tlucqGjA0] showing the EIS data.

The EIS studies used were SI_Venus_slot_v1, SI_Venus_slot_v2 and SI_Venus_slit and SI_Venus_slit_v2, which were run between 21:05 UT on 5-Jun and 05:50 UT on 6-Jun.