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"description": "Through high-resolution X-ray spectroscopy, the X-ray Imaging and Spectroscopy Mission (XRISM, pronounced \"crism\") will transform our understanding of the hot and energetic universe, allowing ground-breaking new research into black holes, clusters of galaxies, compact objects, and the aftermath of stellar explosions.
XRISM's Resolve detector is a 6-by-6-pixel microcalorimeter array. Each pixel is 30 arcseconds in size, and the entire detector must be cooled to 50 millikelvins (-273.1 degrees Celsius or -459.6 degrees Fahrenheit), a fraction of a degree above absolute zero. At such cold temperatures, the array can measure the slight amount of heat generated when each pixel absorbs a single X-ray photon. The miniscule temperature increase is measured by sensitive electronics, and onboard software infers the precise energy of the incoming photon.
By accumulating thousands or even millions of photons from a celestial source, XRISM can generate a high-resolution spectrum in the soft X-ray band (0.4 to 12 keV) band over the detector's 3-by-3 arcminute field of view. The resulting spectra will be the most detailed ever acquired for a variety of sources in the X-ray sky.
The Resolve detector is housed in the Calorimeter Spectrometer Insert (CSI), which itself is contained within a dewar of liquid helium about the size of a refrigerator. The liquid helium cools the detector down to about 4 K, after which a complex multistage mechanical cryogenic system cools the detector down to the required 50 millikelvin operating temperature.",
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"description": "The detector in XRISM's Resolve instrument. The 6-by-6-pixel microcalorimeter array (the square structure at center) can generate a detailed spectrum in the soft X-ray band (0.4 to 12 keV) over its 3-by-3 arcminute field of view.
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Background: An image of NGC 4151 constructed from a combination of X-ray, optical, and radio light. Credit: Spectrum: JAXA/NASA/XRISM Resolve. Background: X-rays, NASA/CXC/CfA/J.Wang et al.; optical, Isaac Newton Group of Telescopes, La Palma/Jacobus Kapteyn Telescope; radio, NSF/NRAO/VLAAlt text: A XRISM spectrum of NGC 4151 with a multiwavelength snapshot of the galaxy in the background. Descriptive text: The spectrum image is labeled, “XRISM Resolve Spectrum of NGC 4151.” It shows a graph where the bottom is labeled, “X-ray energy (keV),” with a range from 5 to 9. The left side is labeled, “X-ray brightness.” A squiggly white line starts just under halfway up the left side. It peaks at just under 6.5 keV, nearly reaching the top of the graph. Then it starts to slope gently downward, with several sharp dips around 7 keV. 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Credit: NASA's Goddard Space Flight Center || XRISM_Cleanroom_B-roll_1080Still.jpg (1920x1080) [727.5 KB] || XRISM_Cleanroom_B-roll_ProRes_1920x1080_30.mov (1920x1080) [7.0 GB] || XRISM_Cleanroom_B-roll_1080.mp4 (1920x1080) [991.6 MB] || XRISM_Cleanroom_B-roll_ProRes_1920x1080_30.webm (1920x1080) [52.0 MB] || ", "release_date": "2020-08-19T00:00:00-04:00", "update_date": "2023-05-03T13:44:44.935607-04:00", "main_image": { "id": 393903, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013200/a013280/XRISM_Cleanroom_B-roll_4k_Still_print.jpg", "filename": "XRISM_Cleanroom_B-roll_4k_Still_print.jpg", "media_type": "Image", "alt_text": "Shorter version of the above video.Credit: NASA's Goddard Space Flight Center", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 13531, "url": "https://svs.gsfc.nasa.gov/13531/", "page_type": "Produced Video", "title": "XRISM: Calorimeter Spectrometer Insert and Mirror Tests", "description": "XRISM team members pose with the XRISM Calorimeter Spectrometer Insert in a NASA Goddard clean room. 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From left to right, they are Bryan James, Mike Sampson, Tomomi Watanabe, Pete Barfknecht, Scott Porter, and Sinclair Douglas.Credit: Larry Gilbert/NASA", "width": 3000, "height": 1995, "pixels": 5985000 } }, { "id": 13530, "url": "https://svs.gsfc.nasa.gov/13530/", "page_type": "Produced Video", "title": "Mirror Quadrants for XRISM", "description": "XRISM team member Yang Soong, a researcher at the University of Maryland, College Park, displays completed mirror elements for an X-ray Mirror Assembly developed for the JAXA/NASA mission. Credit: Taylor Mickal/NASA || GSFC_20190619_XRISM_XMA_Soong_06.jpg (6000x4000) [12.7 MB] || ", "release_date": "2020-01-30T00:00:00-05:00", "update_date": "2023-05-03T13:45:14.505303-04:00", "main_image": { "id": 387798, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013500/a013530/GSFC_20190619_XRISM_XMA_11.jpg", "filename": "GSFC_20190619_XRISM_XMA_11.jpg", "media_type": "Image", "alt_text": "Credit: Taylor Mickal/NASA", "width": 3414, "height": 2000, "pixels": 6828000 } } ], "sources": [], "products": [], "newer_versions": [], "older_versions": [], "alternate_versions": [] }