Sun  ID: 4146

IRIS close-up of a solar flare

The Slit-Jaw Imager (SJI) aboard IRIS (Interface Region Imaging Spectrograph) observes a tiny region of the Sun at an image resolution (0.166 arc-seconds per pixel) almost four times higher than the Solar Dynamics Observatory (SDO) (0.6 arc-seconds per pixel). In addition, IRIS has a narrow slit in the imaging plane (the thin, dark vertical line in the center of the inset) which directs some of the light to a spectrograph which allows solar physicists to determine velocity and temperature of the solar plasma.

In this zoom-in from a full-disk view of the Sun from SDO, the imager is observering the Sun at a wavelength of 133nm (1330 angstroms). The imager field-of-view is moved across the solar disk in four steps, allowing the slit to pass over different regions of the Sun to determine the properties of the plasma.

Note: IRIS and SDO are in very different orbits. You can see samples of the orbits at The 2013 Earth-Orbiting Heliophysics Fleet. IRIS is in a near-Earth orbit, while SDO is much higher at geosynchronous orbit. This difference in camera location creates a small parallax between the images composited from these two cameras.



Visualization Credits

Tom Bridgman (GST): Lead Animator
Genna Duberstein (USRA): Producer
Bart De Pontieu (Lockheed Martin Solar and Astrophysics Lab): Scientist
Adrian Daw (NASA/GSFC): Scientist
Laurence Schuler (ADNET Systems, Inc.): Project Support
Ian Jones (ADNET Systems, Inc.): Project Support
Karen Fox (ASI): Writer
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NASA's Scientific Visualization Studio

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Data Used:
SDO/AIA/304 Filter 2014-01-28T07:25:00 - 2014-01-28T08:07:39
SDO/AIA/171 Filter 2014-01-28T07:25:00 - 2014-01-28T08:07:39
IRIS/Imager/SJI 2014-01-28T07:30:21 - 2014-01-28T08:07:38
SDO/AIA/1600 Filter 2014-01-28T07:25:00 - 2014-01-28T08:07:39
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

SVS >> Solar Wind
SVS >> Sun
GCMD >> Earth Science >> Sun-earth Interactions
GCMD >> Earth Science >> Sun-earth Interactions >> Solar Activity >> Solar Flares
GCMD >> Earth Science >> Sun-earth Interactions >> Solar Activity >> Solar Ultraviolet
SVS >> Space Weather
SVS >> Solar Dynamics Observatory
SVS >> Heliophysics
SVS >> Corona
NASA Science >> Sun
SVS >> IRIS Mission
GCMD >> Earth Science >> Sun-earth Interactions >> Solar Activity >> Coronal Mass Ejections

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version