Jarron Leisenring
@jarron.bsky.social
Astronomer at Steward Observatory and Director of the Imaging Technology Lab. Worked on JWST NIRCam, ground-based AO, IR instrumentation and detectors, high contrast imaging, exoplanet and disks. Statements and opinions are my own. he/him
Reposted by Jarron Leisenring
Are you an IR detectors nerd, or need to go deep into detector systematics for your #JWST MIRI science? You might be interested in this paper on MIRI's Reset Switch Charge Decay effect (RSCD) by Mike Ressler et al 🔭🧪https://iopscience.iop.org/article/10.1088/1538-3873/ae0afb
Radware Bot Manager Captcha
To ensure we keep this website safe, please can you confirm you are a human by ticking the box below.
iopscience.iop.org
October 27, 2025 at 7:49 PM
Are you an IR detectors nerd, or need to go deep into detector systematics for your #JWST MIRI science? You might be interested in this paper on MIRI's Reset Switch Charge Decay effect (RSCD) by Mike Ressler et al 🔭🧪https://iopscience.iop.org/article/10.1088/1538-3873/ae0afb
Reposted by Jarron Leisenring
i made a template you can use to think about what "frame/negation/kirby" looks like for other issues.
For example:
Frame: DOGE is a govt efficiency project to save $
Negation: Actually it made things less efficient and cost $
Kirby: DOGE was a project to break and privatize federal bureaucracy
For example:
Frame: DOGE is a govt efficiency project to save $
Negation: Actually it made things less efficient and cost $
Kirby: DOGE was a project to break and privatize federal bureaucracy
September 25, 2025 at 8:23 PM
i made a template you can use to think about what "frame/negation/kirby" looks like for other issues.
For example:
Frame: DOGE is a govt efficiency project to save $
Negation: Actually it made things less efficient and cost $
Kirby: DOGE was a project to break and privatize federal bureaucracy
For example:
Frame: DOGE is a govt efficiency project to save $
Negation: Actually it made things less efficient and cost $
Kirby: DOGE was a project to break and privatize federal bureaucracy
Reposted by Jarron Leisenring
Fresh JWST view of Uranus taken Oct 6 2025 with NIRCam.
Full size & more info: flic.kr/p/2rByidu 🔭🧪
Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY
Proposal PI: Varun Bajaj
Proposal ID: 8975
Filters: F150W2-F162M, F410M
Full size & more info: flic.kr/p/2rByidu 🔭🧪
Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY
Proposal PI: Varun Bajaj
Proposal ID: 8975
Filters: F150W2-F162M, F410M
October 26, 2025 at 2:04 PM
Fresh JWST view of Uranus taken Oct 6 2025 with NIRCam.
Full size & more info: flic.kr/p/2rByidu 🔭🧪
Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY
Proposal PI: Varun Bajaj
Proposal ID: 8975
Filters: F150W2-F162M, F410M
Full size & more info: flic.kr/p/2rByidu 🔭🧪
Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY
Proposal PI: Varun Bajaj
Proposal ID: 8975
Filters: F150W2-F162M, F410M
Reposted by Jarron Leisenring
Ahhhh gorgeous! Sample print of Leviathan’s Wake has arrived. Just have to decide on a couple sizes, which is a bit tricky since the original was an awkward size
October 4, 2025 at 9:11 PM
Ahhhh gorgeous! Sample print of Leviathan’s Wake has arrived. Just have to decide on a couple sizes, which is a bit tricky since the original was an awkward size
Somehow I missed that there’s a new Neko Case album out?
September 30, 2025 at 3:03 AM
Somehow I missed that there’s a new Neko Case album out?
I 100% thought this was meant to be an image/drawing of a nautilus or some relative.
#SciArtSeptember Day 14: mimic • I'm fascinated by how parts of our anatomy mimics shapes in nature such as the inner ear being shaped like a snail shell. nave of vibration (2017). #SciArt #embroidery
September 14, 2025 at 6:48 PM
I 100% thought this was meant to be an image/drawing of a nautilus or some relative.
Reposted by Jarron Leisenring
A lot to say about this, but one thing is that the Professor in question was a lecturer, and thus did not have tenure.
The destruction of academic freedom is inextricably linked to the loss of worker protection in the university.
The destruction of academic freedom is inextricably linked to the loss of worker protection in the university.
Update on the Texas A&M professor / cell phone video situation: the professor has been fired by the A&M president
president.tamu.edu/messages/an-...
president.tamu.edu/messages/an-...
September 10, 2025 at 1:41 AM
A lot to say about this, but one thing is that the Professor in question was a lecturer, and thus did not have tenure.
The destruction of academic freedom is inextricably linked to the loss of worker protection in the university.
The destruction of academic freedom is inextricably linked to the loss of worker protection in the university.
Highly recommend any opportunity to listen to and hangout with acclaimed authors and all-around wonderful human Manuel Muñoz!
Come join us and Manuel Muñoz tonight at Casa Video 8pm for Tucson Essay Movie Club, featuring 1975's Dog Day Afternoon. These events are primarily social, a writer introducing a movie that excites them with a brief essay, and we all watch it together.
September 7, 2025 at 5:47 PM
Highly recommend any opportunity to listen to and hangout with acclaimed authors and all-around wonderful human Manuel Muñoz!
Reposted by Jarron Leisenring
You might have heard of this company that wants to put giant reflectors in space to "light up" parts of the earth. It would be catastrophic not just for astronomers, but for...any people or creatures who thrive at night.
Have comments? The American Astronomical Society would love to hear from you.
Have comments? The American Astronomical Society would love to hear from you.
Assessing Astronomical Impacts of Reflect Orbital’s Proposed Satellite System
This survey is being conducted by the American Astronomical Society (AAS) to gather input from astronomers, observatories, and night sky users worldwide regarding the potential impacts of Reflect Orbi...
docs.google.com
September 5, 2025 at 4:55 PM
You might have heard of this company that wants to put giant reflectors in space to "light up" parts of the earth. It would be catastrophic not just for astronomers, but for...any people or creatures who thrive at night.
Have comments? The American Astronomical Society would love to hear from you.
Have comments? The American Astronomical Society would love to hear from you.
Reposted by Jarron Leisenring
Inside you are two wolves, five sled dogs, eight Norwegian research scientists, Bennings, Norris, Palmer, Windows, Fuchs, Nauls, Blair, Garry, and Doc Copper.
August 19, 2025 at 11:00 PM
Inside you are two wolves, five sled dogs, eight Norwegian research scientists, Bennings, Norris, Palmer, Windows, Fuchs, Nauls, Blair, Garry, and Doc Copper.
Reposted by Jarron Leisenring
I really dislike how science has started calling almost any fancy computational technique AI. 🧪
The framing of this entire article makes it sound like a benevolent AI independently made these drugs.
That is *pure fantasy*.
Instead: a team of scientists made a machine learning model for a study.
The framing of this entire article makes it sound like a benevolent AI independently made these drugs.
That is *pure fantasy*.
Instead: a team of scientists made a machine learning model for a study.
August 15, 2025 at 6:14 AM
I really dislike how science has started calling almost any fancy computational technique AI. 🧪
The framing of this entire article makes it sound like a benevolent AI independently made these drugs.
That is *pure fantasy*.
Instead: a team of scientists made a machine learning model for a study.
The framing of this entire article makes it sound like a benevolent AI independently made these drugs.
That is *pure fantasy*.
Instead: a team of scientists made a machine learning model for a study.
Reposted by Jarron Leisenring
Everything from U Toronto Press (@uoftpress.bsky.social), including my book, is 50% in their summer sale! Code is SUMMERSALE50.
utppublishing.com/doi/book/10....
utppublishing.com/doi/book/10....
Watching Women - University of Toronto Press
utppublishing.com
August 1, 2025 at 10:38 PM
Everything from U Toronto Press (@uoftpress.bsky.social), including my book, is 50% in their summer sale! Code is SUMMERSALE50.
utppublishing.com/doi/book/10....
utppublishing.com/doi/book/10....
Reposted by Jarron Leisenring
Fellow Tucsonans! Watershed Management Group is doing a virtual education and advocacy event tomorrow (7/30) about the proposed, and potentially devastating to our water supply, Project Blue (an Amazon front). Please share!
watershedmg.org/event/virtua...
watershedmg.org/event/virtua...
Virtual learning session and advocacy event to resist Project Blue
Join WMG to learn about the water impacts of Project BlueJoin Watershed Management Group on Wednesday, July 30th from 5:30 - 7pm for a virtual presentation about how the proposed Project Blue data cen...
watershedmg.org
July 29, 2025 at 11:08 PM
Fellow Tucsonans! Watershed Management Group is doing a virtual education and advocacy event tomorrow (7/30) about the proposed, and potentially devastating to our water supply, Project Blue (an Amazon front). Please share!
watershedmg.org/event/virtua...
watershedmg.org/event/virtua...
I'm a grown adult and you cannot stop me from buying this www.lego.com/en-us/aboutu...
The LEGO® Icons TRANSFORMERS Soundwave Set - About Us - LEGO.com
The LEGO Group Debuts the LEGO® Icons TRANSFORMERS Soundwave Set for Decepticon Fans
www.lego.com
July 24, 2025 at 4:52 AM
I'm a grown adult and you cannot stop me from buying this www.lego.com/en-us/aboutu...
Reposted by Jarron Leisenring
Someone commented that I haven’t posted much wildlife lately. Truth is the camera battery died as I’ve been away. Enjoy these javelina being chaotic a week ago.
July 23, 2025 at 2:24 AM
Someone commented that I haven’t posted much wildlife lately. Truth is the camera battery died as I’ve been away. Enjoy these javelina being chaotic a week ago.
Very much appreciate the shout-out, Senator. I would also like to note that UofA’s Imaging Technology Laboratory was responsible for manufacturing almost half of the sensors for Rubin’s science camera.
astro.arizona.edu/news/tiny-se...
astro.arizona.edu/news/tiny-se...
July 18, 2025 at 6:45 AM
Very much appreciate the shout-out, Senator. I would also like to note that UofA’s Imaging Technology Laboratory was responsible for manufacturing almost half of the sensors for Rubin’s science camera.
astro.arizona.edu/news/tiny-se...
astro.arizona.edu/news/tiny-se...
Reposted by Jarron Leisenring
If you want an actual newsletter option that isn't evil: I use Buttondown and love it
Instead of Substack, consider: starting something called a "website"
July 6, 2025 at 6:01 PM
If you want an actual newsletter option that isn't evil: I use Buttondown and love it
Water boatcrew were one of my favorite aquatic insects to watch zipping around my pond when growing up. These articulated models are so f'ing cool. I want one.
Before #InsectWeek passes me by (working on an arachnid 😅) here’s a bug—a true bug, water boatman (Corixidae)—I made in bronze and silver, articulated to show that, surprisingly, these swimmers are good fliers! 1/2 #SciArt
June 28, 2025 at 1:41 AM
Water boatcrew were one of my favorite aquatic insects to watch zipping around my pond when growing up. These articulated models are so f'ing cool. I want one.
Reposted by Jarron Leisenring
Worth a watch:
Head of Signal, Meredith Whittaker, on so-called "agentic AI" and the difference between how it's described in the marketing and what access and control it would actually require to work as advertised.
Head of Signal, Meredith Whittaker, on so-called "agentic AI" and the difference between how it's described in the marketing and what access and control it would actually require to work as advertised.
June 26, 2025 at 4:28 PM
Worth a watch:
Head of Signal, Meredith Whittaker, on so-called "agentic AI" and the difference between how it's described in the marketing and what access and control it would actually require to work as advertised.
Head of Signal, Meredith Whittaker, on so-called "agentic AI" and the difference between how it's described in the marketing and what access and control it would actually require to work as advertised.
Reposted by Jarron Leisenring
Briefly wandered over to The Other Place to gauge the response to the NASA budget devastation to encounter a bunch of gleeful 'we spend too much money, so this is great.'
TO BE, ONCE AGAIN, PERFECTLY CLEAR, THE BUDGET REQUEST MOVES ALL THIS MONEY TO DEFENSE. IT SPENDS IT. NO MONEY IS SAVED.
TO BE, ONCE AGAIN, PERFECTLY CLEAR, THE BUDGET REQUEST MOVES ALL THIS MONEY TO DEFENSE. IT SPENDS IT. NO MONEY IS SAVED.
June 1, 2025 at 1:38 AM
Briefly wandered over to The Other Place to gauge the response to the NASA budget devastation to encounter a bunch of gleeful 'we spend too much money, so this is great.'
TO BE, ONCE AGAIN, PERFECTLY CLEAR, THE BUDGET REQUEST MOVES ALL THIS MONEY TO DEFENSE. IT SPENDS IT. NO MONEY IS SAVED.
TO BE, ONCE AGAIN, PERFECTLY CLEAR, THE BUDGET REQUEST MOVES ALL THIS MONEY TO DEFENSE. IT SPENDS IT. NO MONEY IS SAVED.
Reposted by Jarron Leisenring
This is so fucking good
May 19, 2025 at 12:01 PM
This is so fucking good
Was just talking about this exact thing the other day.
Gonna need all the halal restaurants we can get now that they've made food safety illegal.
This is a fucking wild thing to post
May 2, 2025 at 7:21 PM
Was just talking about this exact thing the other day.
Reposted by Jarron Leisenring
"Coming to a country where human rights are appreciated, the whole world thinks about the U.S. in such a prestigious way, but what’s happened is obviously against the law ... This for me was racist, more than anything.”
📝 by @jwashing.bsky.social
azluminaria.org/2025/04/29/u...
#academicsky
📝 by @jwashing.bsky.social
azluminaria.org/2025/04/29/u...
#academicsky
UA student’s life upended after his visa is suddenly revoked then reinstated - AZ Luminaria
It’s been a whirlwind few weeks for Amir, a University of Arizona Ph.D. student who, in early April, was putting final touches on his resume to go on the job market and was preparing for his oral exam...
azluminaria.org
April 29, 2025 at 10:54 PM
"Coming to a country where human rights are appreciated, the whole world thinks about the U.S. in such a prestigious way, but what’s happened is obviously against the law ... This for me was racist, more than anything.”
📝 by @jwashing.bsky.social
azluminaria.org/2025/04/29/u...
#academicsky
📝 by @jwashing.bsky.social
azluminaria.org/2025/04/29/u...
#academicsky
Reposted by Jarron Leisenring
Say it louder for the folks in the back.
NASA’s annual call for grant proposals is now 68 days late.
NASA’s annual call for grant proposals is now 68 days late.
The canceled grands are shock and awe, but the real damage will come from the long-term (massive) reductions in funding to the entire US research ecosystem and the defunding of entire fields and initiatives for training, growing, and diversifying the research workforce.
April 24, 2025 at 12:28 AM
Say it louder for the folks in the back.
NASA’s annual call for grant proposals is now 68 days late.
NASA’s annual call for grant proposals is now 68 days late.