{ "id": 5245, "url": "https://svs.gsfc.nasa.gov/5245/", "page_type": "Visualization", "title": "X1.1 flare at Active Region 13614 and more - March 23, 2024", "description": "Solar Dynamics Observatory (SDO) operates in a geosynchronous orbit around Earth to obtain a continuous view of the Sun. The particular instrument in this visualization records imagery in the ultraviolet portion of the spectrum at wavelengths normally absorbed by Earth's atmosphere - so we need to observe them from space.Active Regions 13614 (upper middle) and 13615 (lower middle) appear to launch dual solar flares with an equivalent class of X1.1. For details of this event, see the Space Weather database entry. For more information on the classification of solar flares, see Solar Flares: What Does It Take to Be X-Class? or X-Class: A Guide to Solar Flares. The point-spread function correction (PSF) has been applied to all this imagery. || ", "release_date": "2024-04-18T00:00:00-04:00", "update_date": "2024-04-15T11:49:28.117172-04:00", "main_image": { "id": 1091022, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a005200/a005245/20240323_AR13615X11_AIA131_PSF_stamped.000375_print.jpg", "filename": "20240323_AR13615X11_AIA131_PSF_stamped.000375_print.jpg", "media_type": "Image", "alt_text": "Active Regions 13614 (upper) and 13615 (lower) near the center of the solar disk, appear to launch dual solar flares with an equivalent class of X1.1 in this view through the SDO/AIA 131 angstrom filter.", "width": 1024, "height": 1024, "pixels": 1048576 }, "main_video": { "id": 2, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a001700/a001703/4559_Kepler_Neptune_Twitter_720.mp4", "filename": "4559_Kepler_Neptune_Twitter_720.mp4", "media_type": "Movie", "alt_text": "", "width": 1280, "height": 720, "pixels": 921600 }, "progress": "Complete", "media_groups": [ { "id": 373750, "url": "https://svs.gsfc.nasa.gov/5245/#media_group_373750", "widget": "Basic text with HTML", "title": "", "caption": "", "description": "Solar Dynamics Observatory (SDO) operates in a geosynchronous orbit around Earth to obtain a continuous view of the Sun. The particular instrument in this visualization records imagery in the ultraviolet portion of the spectrum at wavelengths normally absorbed by Earth's atmosphere - so we need to observe them from space.

Active Regions 13614 (upper middle) and 13615 (lower middle) appear to launch dual solar flares with an equivalent class of X1.1. For details of this event, see the Space Weather database entry.

For more information on the classification of solar flares, see Solar Flares: What Does It Take to Be X-Class? or X-Class: A Guide to Solar Flares. The point-spread function correction (PSF) has been applied to all this imagery.
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What is the PSF (Point Spread-Function)?

Many telescopes, especially reflecting telescopes such as the ones used on SDO (Wikipedia), have internal structures that support various optical components. These components can result in incoming light being scattered to other parts of the image. This can appear in the image as a faint haze, brightening dark areas and dimming bright areas. The point-spread function (Wikipedia) is a measure of how light that would normally be received by a single camera pixel, gets scattered onto other pixels. This is often seen as the \"spikes\" seen in images of bright stars. For SDO, it manifests as a double-X shape centered over a bright flare (see Sun Emits Third Solar Flare in Two Days). The effect of this scattered light can be computed, and removed, by a process called deconvolution (Wikipedia). This is often a very compute-intensive process which can be sped up by using a computers graphics-processing unit (GPU) for the computation.
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