Hinode (was Solar-B) was launched at 6:36 a.m. on September 23, 2006 (Japan Standard Time).

New XPOW: Hinode XRT Digital Valentine's Day Cards

New XPOW: A Magnetic Null and Cool Reconnection

New XPOW: An Active Region Prominence

New XPOW: SCIA Reveals Transient Coronal Hole

New XRT paper: "The Hinode/XRT Full-Sun Image Corrections and the Improved Synoptic Composite Image Archive" by Aki Takeda, Keiji Yoshimura, and Steve Saar was published in Solar Physics, 2016, Vol 291, pg 317. The 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. This article serves as an introduction to the SCIA, i.e., to the structure of the archive and specification of the data products included therein. We also describe a number of techniques used to improve the quality of the archived images: preparation of composite images to increase intensity dynamic range, removal of dark spots that are due to contaminants on the CCD, and correction of the visible stray light contamination that has been detected on the Ti-poly and C-poly filter images since May 2012.

New XPOW: Unraveling an Active Region

New XPOW: Active Region Sigmoid

New XPOW: 2016 Hinode XRT Wall Calendar

New XPOW: Hinode's Close Call with Santa

New XPOW: A Not-So-Quiet Sun

New XPOW: A Quiet Sun is Full of Potential

New XPOW: X-ray Sun

See the XRT News page for older XRT news items.

The Hinode X-Ray Telescope (XRT) is a high-resolution grazing-incidence telescope, which is a successor to the highly successful Yohkoh Soft X-Ray Telescope (SXT). A primary purpose of the Hinode XRT is to observe the generation, transport, and emergence of solar magnetic fields, as well as the ultimate dissipation of magnetic energy in forms such as flares and pico-flares, coronal heating, and coronal mass ejections. The XRT aboard Hinode observes the dissipation part of the life-cycle story of solar magnetic fields. High-resolution soft X-ray images reveal magnetic field configuration and its evolution, allowing us to observe the energy buildup, storage and release process in the corona for any transient event. One of the unique features of XRT is its wide temperature coverage to see all the coronal features that are not seen with any normal incidence telescope.

The XRT consists of the X-ray and visible light optics, focal plane mechanisms (filters and shutter), and the 2k x 2k CCD camera. The Mission Data Processor (MDP) also plays a vital role for XRT.

The XRT was designed and developed by the Japan-US collaboration between Smithsonian Astrophysical Observatory (SAO), NASA MSFC, JAXA, and NAOJ. The XRT telescope was tested and calibrated at the XRCF at MSFC, and the CCD camera was tested and calibrated in X-rays at the ATC of the NAOJ with JAXA.

If XRT data is used in a published article or report, please give a proper Acknowledgement:

"Hinode is a Japanese mission developed and launched by ISAS/JAXA, with NAOJ as domestic partner and NASA and STFC (UK) as international partners. It is operated by these agencies in co-operation with ESA and the NSC (Norway)."

If an XRT image is displayed in a popular article, on a website, et cetera, then please acknowledge the contributing institutions:


You may find a list of the XRT instrument papers and other important references that should be considered for inclusion in your XRT science paper HERE.

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