Hinode (was Solar-B) was launched at 6:36 a.m. on September 23, 2006 (Japan Standard Time).
New XPOW: 112 Hours of Full-Sun X-Ray Images
New XPOW: Mysterious Flare-Ribbon-Like Structure
XPOW Archive Upgrade
The XPOW Archive has been upraded to be more easily searched. Each XPOW entry now also includes "keywords" that can be used to find related posts by querying the archive.
New XPOW: Sigmoids on Parade!
New XPOW: Polar Aurora
New XPOW: Cutest. Loop. Ever.
New XPOW: X-Ray Sun Two-Month Mashup
New XPOW: Full-Sun Images in Three Temperature Ranges
New XPOW: X1.1 Flare with CME on November 10th, 2013
New XPOW: Heart-shaped productive Active Region 11875
New Observation Resources!
The XRT Team has released two new resources for browsing XRT data. First, we have a revamped synoptic gallery. All of XRT's twice-daily full sun images are on display, and starting in June of 2013, each image is a composite of 3 exposures (long-medium-short) instead of 2. This provides a more lovely showing of the broad dynamic range the sun is currently displaying in its maximum activity phase.
Next, we've got the XRT Flare Catalog. The catalog includes basic information for all the flares that have occurred during the Hinode mission, along with summaries and preview movies of XRT's observations for each event. Links to both resources can be found under the "Data" tab in the sidebar and under "Observations" on the Mission Ops page.
New XPOW: Solar Eclipse of November 3rd, 2013
Calibration Update: The calibration of the instrument response functions has been updated, and the XRT response software in SolarSoft has also been updated accordingly (e.g. make_xrt_wave_resp.pro, xrt_teem.pro, xrt_eff_area.pro, etc.). The change adjusts some of the filter thicknesses to reflect the analysis of Narukage et al. 2013. As a result, the estimated effective areas of those filters (med-Be, med-Al, thick-Be, & thick-Al) have changed.
Click here for a plot of the updated temperature response functions (dotted lines indicated the previous calibration).
The new calibration files have been made available in SolarSoft. Please ensure that your SSW IDL libraries are up to date. See program headers and/or the XRT Analysis Guide for documention, and please direct questions and bug reports to xrt_manager [at] head [dot] cfa [dot] harvard [dot] edu.
New XPOW: More Flares from AR 11882!
New XPOW: M-Flares with CMEs on October 26th & 27th
New XPOW: Sigmoid Eruptions on August 7th, 2013
New XPOW: B Flare on September 23rd
Congratulations from the XRT Team to Lucas Tarr and Will Hanneman for recently completing their respective theses. The newly minted Dr. Tarr successfully defended his PhD dissertation on "Energetic Consequences of Flux Emergence", and Mr. Hanneman completed a master's thesis on the "Thermal Structure of Current Sheets and Supra-Arcade Downflows".
XRT Spotlight: Head over to the Bad Astronomy blog at Slate for an article by Phil Plait on XRT eclipse observations from last May.
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:
"(SAO, NASA, JAXA, NAOJ)"
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.