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Overview
Scientific Data
Documents

Overview
The IRIS instrument is a multi-channel imaging spectrograph with a 20 cm UV telescope. IRIS will obtain spectra along a slit (1/3 arcsec wide), and slit-jaw images. The CCD detectors will have 1/6 arcsec pixels. IRIS will have an effective spatial resolution between 0.33 and 0.4 arcsec and a maximum field of view of 120 arcsec.

The far-UV channel covers: 1332-1358 Å and 1390-1406 Å
with 40 m Å resolution and an effective area of 2.8 cm2.

The near-UV channel covers: 2785-2835 Å
with 80 mÅ resolution and an effective area 0.3 cm2.

Slit-jaw imaging will have four passbands:

1335 Å and 1400 Å with 40 Å bandpass each

2796 Å and 2831 Å with 4 Å bandpass each

IRIS will have a high data rate (0.7 Mbit/s on average) so that the baseline cadence is: 5s for slit-jaw images, 1s for 6 spectral windows, including rapid rastering to map solar regions.


Scientific Data
The figure below shows expected count rates in the FUV and NUV passbands.

To help prepare for the interpretation of Mg II h/k data interpretation, Scott McIntosh at HAO has now made the Mg II h/k data taken by SMM/UVSP available online (in IDL format). Click here for more details.

Documents
• Instrument Description from Concept Study Report

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