Hinode/EIS spectral atlases

Most of the EIS observation studies take only small sections of the complete EIS spectral range, but some take the complete range. These are very valuable for identifying new emission lines, investigating atomic data issues, and checking the EIS calibration. Below you can access a list of all of the "Atlas" studies that have been run since 2010, and example spectral atlases for different types of solar feature.

The "Atlas" study

A spectral atlas synoptic program was introduced in May 2010 to obtain spectral atlases of a variety of solar structures on a regular basis. Three EIS studies were created, called Atlas_30s, Atlas_60s and Atlas_120s. All three cover 120"x160" with the 2" slit and the only difference between them is the exposure time which is 30s, 60s and 120s. The study durations are approximately 30min, 60min and 120min respectively.

The plan is to obtain a spectral atlas twice a month during the 1st and 3rd full weeks of the month (note that an EIS planning week begins on Monday). The aim is to obtain a balanced number of quiet Sun, coronal hole and active region spectra both on and off the solar disk.

List of all Atlas studies

Example spectral atlases

The links below give access to pdf versions of complete EIS spectra from different solar features. The spectra have been calibrated and line identifications are given, although these should be considered to be complete or definitive.

The spectra are plotted twice, and the thick line shows the spectrum corresponding to the Y-axis scale. The thin line is the spectrum divided by 10. No attempt has been made to correct instrumental wavelength offsets, so the centroids of the emission lines may differ from rest wavelengths by up to 0.05 angstroms.

Quiet Sun, 30-Nov-2006, 01:15 UT

Active region, 4-Nov-2006, 16:20 UT

Active region moss, 20-Feb-2011, 06:34 UT

Active region off-limb, 10-Sep-2010, 14:06 UT

Flare, 2-Jun-2007, 19:56 UT (see Del Zanna 2008)

Coronal hole, 24-May-2007, 15:51 UT

Quiet Sun off-limb, 9-Mar-2007, 20:03 UT


This page mantained by Dr.P.R.Young, last revised on 22-Aug-2013