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#xrism

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Daniel Fischer<p>XRISM insights for interstellar Sulfur: <a href="https://arxiv.org/abs/2506.08751" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/abs/2506.08751</span><span class="invisible"></span></a> -&gt; NASA, JAXA <a href="https://scicomm.xyz/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> Satellite X-rays Milky Way’s Sulfur: <a href="https://science.nasa.gov/centers-and-facilities/goddard/nasa-jaxa-xrism-satellite-x-rays-milky-ways-sulfur/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/centers-and-f</span><span class="invisible">acilities/goddard/nasa-jaxa-xrism-satellite-x-rays-milky-ways-sulfur/</span></a></p>
Daniel Fischer<p>The XRISM/Resolve view of the Fe K region of Cyg X-3: <a href="https://arxiv.org/abs/2411.00597" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/abs/2411.00597</span><span class="invisible"></span></a> -&gt; NASA, JAXA <a href="https://scicomm.xyz/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> Mission Looks Deeply Into ‘Hidden’ Stellar System: <a href="https://science.nasa.gov/missions/xrism/nasa-jaxa-xrism-mission-looks-deeply-into-hidden-stellar-system/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/missions/xris</span><span class="invisible">m/nasa-jaxa-xrism-mission-looks-deeply-into-hidden-stellar-system/</span></a></p>
Matt Willemsen<p>XRISM Detects Iron in Accretion Disk around NGC 4151’s Supermassive Black Hole<br><a href="https://www.sci.news/astronomy/xrism-iron-accretion-disk-supermassive-black-hole-ngc-4151-12919.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">sci.news/astronomy/xrism-iron-</span><span class="invisible">accretion-disk-supermassive-black-hole-ngc-4151-12919.html</span></a> <a href="https://mastodon.social/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> <a href="https://mastodon.social/tags/iron" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>iron</span></a> <a href="https://mastodon.social/tags/BlackHole" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BlackHole</span></a> <a href="https://mastodon.social/tags/AccretionDisk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AccretionDisk</span></a> <a href="https://mastodon.social/tags/USSPalomino" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>USSPalomino</span></a></p>
AkaSci 🛰️<p>One other major difference between XRISM and Chandra is their operating orbit.</p><p>Chandra uses an highly elliptical inclined orbit at 14,308 x 134,528 km altitude with a period of over 63 hours, while XRISM uses a circular inclined low-earth-orbit 550 km above earth, with a period of just 96 minutes, similar to Hubble.</p><p>It should be noted that the 550 km orbital space is buzzing with thousands of Starlink satellites.</p><p><a href="https://chandra.harvard.edu/resources/ppt/illustrations/orbit/index.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">chandra.harvard.edu/resources/</span><span class="invisible">ppt/illustrations/orbit/index.html</span></a><br><a href="https://en.wikipedia.org/wiki/X-Ray_Imaging_and_Spectroscopy_Mission" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/X-Ray_Im</span><span class="invisible">aging_and_Spectroscopy_Mission</span></a><br><a href="https://fosstodon.org/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> <a href="https://fosstodon.org/tags/Chandra" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Chandra</span></a><br>12/n</p>
AkaSci 🛰️<p>Here is a pic of the impressive looking XRISM Resolve instrument and its cryo-cooling encasing, being worked upon by engineers and technicians at NASA.</p><p><a href="https://fosstodon.org/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a><br>11/n</p>
AkaSci 🛰️<p>The XRISM calorimeter is maintained at a near-absolute-zero temp. of 50 mK using an elaborate set of concentric cooling shields, 2-stage sterling cryo-coolers (2ST), Joule-Thomson coolers (JT), Adiabatic Demagnetization Refrigerators (ADR) and 30 L liquid Helium (LHe).</p><p>Each shield and each stage lowers the temperature of the equipment for the next shield/stage.</p><p>The LHe will evaporate in 3 years, but ADR3 will still enable 50 mK.</p><p><a href="https://ntrs.nasa.gov/api/citations/20190027533/downloads/20190027533.pdf" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">ntrs.nasa.gov/api/citations/20</span><span class="invisible">190027533/downloads/20190027533.pdf</span></a><br><a href="https://arxiv.org/pdf/2303.01642.pdf" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/pdf/2303.01642.pdf</span><span class="invisible"></span></a><br><a href="https://fosstodon.org/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a><br>10/n</p>
AkaSci 🛰️<p>X-ray micro-calorimeters measure the energy of X-rays by converting the energy of each photon into heat in an absorber which is attached to a highly sensitive thermometer.</p><p>An incident photon causes a tiny rise in temperature proportional to the photon energy, which decays over ~3.5 ms.</p><p>The data is analyzed to select pulses that are not contaminated by other pulses within a time window around it.</p><p>Near absolute zero temps are needed at the detector.</p><p><a href="https://arxiv.org/pdf/2303.01642.pdf" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/pdf/2303.01642.pdf</span><span class="invisible"></span></a><br><a href="https://fosstodon.org/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> <br>9/n</p>
AkaSci 🛰️<p>The XRISM Resolve instrument, developed by NASA-Goddard, is an ultra-sensitive spectrometer, designed to measure the energy of incident X-ray photons at very high resolution.</p><p>X-ray energy range: 0.3–12 keV<br>Field of view: 3’x3’<br>Energy Resolution: &lt;7 eV</p><p>By measuring the number of X-ray photons at various energy levels, a spectrogram can be created, as shown in post #3.<br> <br>At the heart of Resolve is a 6x6 X-ray micro-calorimeter array kept at 0.050°K.</p><p><a href="https://arxiv.org/pdf/2303.01642.pdf" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/pdf/2303.01642.pdf</span><span class="invisible"></span></a><br><a href="https://fosstodon.org/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> <br>8/n</p>
Matt Willemsen<p>NASA/JAXA XRISM mission reveals its first look at X-ray cosmos<br><a href="https://phys.org/news/2024-01-nasajaxa-xrism-mission-reveals-ray.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">phys.org/news/2024-01-nasajaxa</span><span class="invisible">-xrism-mission-reveals-ray.html</span></a> <a href="https://mastodon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://mastodon.social/tags/JAXA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>JAXA</span></a> <a href="https://mastodon.social/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> <a href="https://mastodon.social/tags/XRay" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRay</span></a> <a href="https://mastodon.social/tags/cosmos" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>cosmos</span></a> <a href="https://mastodon.social/tags/spectrum" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spectrum</span></a></p>
AkaSci 🛰️<p>The XRISM XTend camera uses four 640x640 pixel CCDs. </p><p>The CCDs convert X-rays to electrons and then to electrical signals.</p><p>The design enables measurement of X-rays at different wavelengths without filters. Unlike optical light, where one electron is emitted per photon, a high energy X-ray photon causes emission of multiple electrons. A count of the electrons gives an estimate of the X-ray photon energy.</p><p>Energy band: 0.4-13 keV<br>FOV: 38'x38'<br>CCD temp: −120°C</p><p><a href="https://arxiv.org/pdf/2303.07575.pdf" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/pdf/2303.07575.pdf</span><span class="invisible"></span></a><br><a href="https://fosstodon.org/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> <br>7/n</p>
AkaSci 🛰️<p>How does one focus X-rays in an X-ray telescope?</p><p>Parabolic mirrors and lenses don’t work since X-rays travel right thru them. But X-rays that strike a surface at a very shallow angle are reflected, as illustrated below.</p><p>That principle is used to create an X-ray telescope mirror, which consists of precisely ground gold-coated concentric thin conical shells. Each XRISM XMA uses 203 pairs of such mirror shells for double reflection.</p><p><a href="https://imagine.gsfc.nasa.gov/observatories/technology/xray_telescopes1.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">imagine.gsfc.nasa.gov/observat</span><span class="invisible">ories/technology/xray_telescopes1.html</span></a><br><a href="https://www.xrism.jaxa.jp/en/technology/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">xrism.jaxa.jp/en/technology/</span><span class="invisible"></span></a><br><a href="https://fosstodon.org/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> <br>6/n</p>
AkaSci 🛰️<p>Let’s take a deeper look at the design of the XRISM X-ray telescope.</p><p>It contains -<br>1. Two identical X-ray Mirror Assemblies (XMA) that focus X-rays on 2 instruments 5.6 m away.</p><p>2. The Xtend X-ray imager (CCD based camera). Energy band = 0.4-13 keV, Field of View (FOV) = 38'x38', energy resolution ≤250 eV.</p><p>3. The Resolve calorimeter-based X-ray spectrometer. Energy band = 0.3-12 keV, FOV = 3’x3’, energy resolution ≤7 eV.</p><p><a href="https://www.xrism.jaxa.jp/en/technology/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">xrism.jaxa.jp/en/technology/</span><span class="invisible"></span></a><br><a href="https://heasarc.gsfc.nasa.gov/docs/xrism/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">heasarc.gsfc.nasa.gov/docs/xri</span><span class="invisible">sm/</span></a><br><a href="https://fosstodon.org/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> <br>5/n</p>
Ansgar Schmidt :verified:<p>Japan’s New X-Ray Observatory Sees First Light <a href="https://www.universetoday.com/165085/japans-new-x-ray-observatory-sees-first-light/" rel="nofollow noopener" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">universetoday.com/165085/japan</span><span class="invisible">s-new-x-ray-observatory-sees-first-light/</span></a> <a href="https://mastodon.cloud/tags/supernovaremnant" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>supernovaremnant</span></a> <a href="https://mastodon.cloud/tags/x" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>x</span></a>-rayobservatory <a href="https://mastodon.cloud/tags/x" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>x</span></a>-rayastronomy <a href="https://mastodon.cloud/tags/galaxycluster" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>galaxycluster</span></a> <a href="https://mastodon.cloud/tags/satellites" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>satellites</span></a> <a href="https://mastodon.cloud/tags/abell2319" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>abell2319</span></a> <a href="https://mastodon.cloud/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.cloud/tags/snrn132" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>snrn132</span></a> <a href="https://mastodon.cloud/tags/x" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>x</span></a>-rays <a href="https://mastodon.cloud/tags/xrism" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>xrism</span></a> <a href="https://mastodon.cloud/tags/jaxa" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>jaxa</span></a> <a href="https://mastodon.cloud/tags/nasa" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nasa</span></a></p>
AkaSci 🛰️<p>Here is a nice graphic showing various space (and some ground) telescopes and the primary spectrum they cover.</p><p>JAXA' s X-Ray Imaging and Spectroscopy Mission XRISM covers the X-ray spectrum from 0.1 to 3.1 nm. Chandra covers a similar range from 0.12 to 12 nm. </p><p>Radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays are all electromagnetic radiation (aka light) at different wavelengths and energy levels.</p><p>Original image source: <a href="https://imagine.gsfc.nasa.gov/science/toolbox/emspectrum_observatories1.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">imagine.gsfc.nasa.gov/science/</span><span class="invisible">toolbox/emspectrum_observatories1.html</span></a><br><a href="https://fosstodon.org/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> <br>4/n</p>
AkaSci 🛰️<p>The 2nd image, taken by XRISMs’ NASA-developed Resolve X-ray micro calorimeter, shows the ultra-hi-res X-ray spectrum of supernova remnant N132D in the Large Magellanic Cloud, a dwarf galaxy around 163,000 light-years away.</p><p>The spectrum vividly shows emission lines from various ions in the 1.8 -10 keV energy band (0.69 to 0.12 nm wavelengths), incl. silicon, sulfur, argon, calcium and iron. The background image of N132D was taken by the Xtend camera.</p><p><a href="https://global.jaxa.jp/press/2024/01/20240105-1_e.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">global.jaxa.jp/press/2024/01/2</span><span class="invisible">0240105-1_e.html</span></a><br><a href="https://fosstodon.org/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> <a href="https://fosstodon.org/tags/Science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Science</span></a><br>3/n</p>
AkaSci 🛰️<p>The 1st image, taken by XRISM’s Xtend X-ray CCD camera, is that of Galaxy cluster Abell 2319, a system where 2 clusters of galaxies are colliding about 770 million light-years away. The image is a superposition of optical and X-ray observations (shown in purple).</p><p>The purple hues signify the distribution of high-temp. plasma emitting X-rays.</p><p>The image shows Xtend’s wider field of view compared to Chandra and other X-ray telescopes.</p><p><a href="https://global.jaxa.jp/press/2024/01/20240105-1_e.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">global.jaxa.jp/press/2024/01/2</span><span class="invisible">0240105-1_e.html</span></a><br><a href="https://fosstodon.org/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> <br>2/n</p>
AkaSci 🛰️<p>The X-ray telescope XRISM just released two high-quality images taken at the end of its commissioning process (aka first light).</p><p>Launched on Sep 7, 2023, the X-Ray Imaging and Spectroscopy Mission (XRISM, pronounced "crism") is an X-ray space telescope mission developed by JAXA in partnership with NASA and participation from ESA and other international orgs.</p><p>XRISM is similar to but more sensitive than the aging 24-year Chandra X-ray space telescope.</p><p><a href="https://science.nasa.gov/missions/xrism/nasa-jaxa-xrism-mission-reveals-its-first-look-at-x-ray-cosmos/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/missions/xris</span><span class="invisible">m/nasa-jaxa-xrism-mission-reveals-its-first-look-at-x-ray-cosmos/</span></a><br><a href="https://fosstodon.org/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> <br>1/n</p>
Volodymyr<p><span class="h-card" translate="no"><a href="https://mastodon.online/@elizabethtasker" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>elizabethtasker</span></a></span> <span class="h-card" translate="no"><a href="https://social.tchncs.de/@schnedan" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>schnedan</span></a></span> </p><p>Is this kind aperture door a new technology though? I think Hitomi had something very similar (but no luck there), yet various previous soft X-ray telescopes had/have some kind of aperture doors. </p><p>What makes the door on <a href="https://mastodon.social/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> new and untested technology? Serious question, maybe someone knows.</p>
Daniel Fischer<p>The Japan Aerospace Exploration Agency (JAXA) has released the first-glimpses of X-ray observation data of the satellite's soft X-ray imager (Xtend *1) and soft X-ray spectrometer (Resolve *1) on board the X-ray Imaging and Spectroscopy Mission <a href="https://scicomm.xyz/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a>: <a href="https://global.jaxa.jp/press/2024/01/20240105-1_e.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">global.jaxa.jp/press/2024/01/2</span><span class="invisible">0240105-1_e.html</span></a></p>
Daniel Fischer<p>End of the critical operation period for the X-ray Imaging and Spectroscopy Mission: <a href="https://global.jaxa.jp/press/2023/09/20230911-1_e.html" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="ellipsis">global.jaxa.jp/press/2023/09/2</span><span class="invisible">0230911-1_e.html</span></a> - <a href="https://scicomm.xyz/tags/XRISM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>XRISM</span></a> has entered the commissioning period, which will last about three months to verify the functions of the satellite's onboard equipment.</p>
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