XRT Synoptic Composite Image Archive

What is SCIA ?
The Hinode/XRT Synoptic Composite Image Archive (SCIA) is a storage and gallery of X-ray full-Sun images obtained through the synoptic program of the X-Ray Telescope (XRT) onboard the Hinode satellite. The archived images provide a quick history of solar activity through the daily and monthly layout pages and long-term data for morphological and quantitative studies of the X-ray corona. You can get more information from our project paper:
Takeda, Yoshimura and Saar (2016) SolarPhysics, vol.291, p.317.

What is composite image ?
Since the full-Sun images contain a variety of structures with different brightness, it is often difficult to capture all of them properly with a single exposure. Creating a composite image from a few images with different depth of exposures is a simple and convenient method to increase the dynamic range of the intensity. It is performed by replacing the pixels saturated in the longer exposure with those of shorter exposure.

Structure of this archive
The SCIA has two layers of pages: Monthly pages consist of daily thumbnail images of the month, arranged similar to a monthly calendar. Daily pages work as a quick viewer of all the images available for the day. The pages on both layers are connected to each other with symbolic links, so that users can move back and forth between the layers. To see the images, choose the year and month from the navigation bar on the left, that brought you to the monthly page.

Disclaimer/Acknowledgement
If an XRT image in this archive is used in a published article, report, popular article, on a website, etc., please give a proper acknowledgement (sample statements).
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