First Results From EUNIS 2005

Details First Results From EUNIS 2005 First Results From EUNIS 2005

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh41b1122r&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SH41B-1122

Astronomy and Astrophysics

Astrophysics

7500 Solar Physics, Astrophysics, And Astronomy, 7509 Corona, 7546 Transition Region, 7549 Ultraviolet Emissions, 7594 Instruments And Techniques

Scientific paper

The Extreme Ultraviolet Normal-Incidence Spectrograph (EUNIS) is a sounding rocket experiment to investigate the energetics of the solar corona and hotter transition region through high-resolution imaging spectroscopy with a rapid (2 second) cadence. Pre-flight characterization of throughput has demonstrated that EUNIS is the most sensitive solar EUV spectrograph in existence, having over 100 times the throughput of its predecessor, the Solar Extreme ultraviolet Research Telescope and Spectrograph (SERTS). We report initial results from the first flight in November 2005 from White Sands Missile Range. The main scientific goal of the first EUNIS flight is to extend the investigation of transient phenomena, such as nanoflares and blinkers, to shorter timescales than has been possible with previous EUV spectrographs. The two independent optical systems of EUNIS record spatially co-aligned spectra over two passbands (170--205 Å and 300--370 Å) simultaneously with spectral resolution of 60 mÅ or 120 mÅ, respectively. The longwave passband includes He II 304 Å and strong lines from Fe XI--XVI. The shortwave passband has a sequence of very strong Fe IX--XIII lines. Together, the EUNIS telescopes furnish a wide range of temperature and density diagnostics and enable underflight calibration of instrumental passbands on the SOHO, TRACE, Solar-B, and STEREO missions.

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