Jarron Leisenring

bsky.app/profile/popp...

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

Top is an empty rectangle with a jagged line in the middle. The left side is labeled "Frame" "F is happening!" The right side is labeled "Negation" "F is not true!" Below is a large image of Kirby, a round pink blob with eyes with a small version of the Frame F shape flying into his mouth. To the right is a large pink rectangle labeled "Kirby" "K is happening, that's why they're saying F"

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

Image of Uranus taken by the James Webb Space Telescope, showing a whitish north polar region, vivid blue-greenish atmosphere and a few whitish elongated storms visible around the pole. The planet is surrounded by clearly defined ring system set against the black background of space.

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

Excited that we don’t have to go all the way to France to see Versailles anymore.

That's way too low of a management-to-worker ratio.

Hoping that UA follows suit now that there’s critical mass. Would be a bad start to the new leadership’s tenure and relationship with the faculty and state governor if they decide otherwise. I wish they had taken a stand early on, and looks bad if they wait much longer now.

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?

It is so cool!

I 100% thought this was meant to be an image/drawing of a nautilus or some relative.

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.

a man in a suit and tie is saying `` surely , you can 't be serious '' . Alt: Scene from the movie Airplane with Ted Striker (Robert Hayes) incredulously asking, “Surely, you can’t be serious?” Without skipping a beat Dr. Rumack (Leslie Nielsen) responds “I am serious. And don’t call me Shirley.”

I may actively look for opportunities to deadpan lines from Airplane. I’ll stop doing it once it actually succeeds.

That was an easy block.

There's also a JWST version of the same location on the sky (archive.stsci.edu/hlsp/jades) that comes with a really nifty web interface for zooming around so you can find your favorite galaxies and see what they look like in the infrared: jades.idies.jhu.edu?ra=53.117350...

Highly recommend any opportunity to listen to and hangout with acclaimed authors and all-around wonderful human Manuel Muñoz!

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...

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.

Care to reevaluate who you’re actually conversing with and try again? Or are you just a bot and incapable?

This is a wild thing to say, but I suspect you're not actually understanding the content to which you're responding.

Also, "Your people"? 🤨

(It’s been a week and I am looking forward to sleeping 72 hours straight)

Whew. Thank you. This message came a little later than usual this week, so I was getting worried that I hadn’t yet done enough.

UAZ astro faculty are also retreating. We got kicked out of our fancy digs we reserved because someone more important wanted it. No windows or fancy chairs here.

Inside you are two wolves, five sled dogs, eight Norwegian research scientists, Bennings, Norris, Palmer, Windows, Fuchs, Nauls, Blair, Garry, and Doc Copper.

Article on BBC news. Title: AI designs antibiotics for gonorrhoea and MRSA superbugs Description: Two new potential drugs have been designed by AI to kill drug-resistant bacteria, in a major Massachusetts Institute of Technology study.

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.

My close-up vision is finally starting to fail me, so definitely considering this.

Well, the timing is especially convenient given the Cycle 5 call for proposals recently came out. 🙂

"galaxies to form and EM radiation far earlier than our current models indicate." This statement assumes the detections of z~16-25 are real. Looking at the paper, most of the 2.5-5um detections this result depends on are barely above the noise of the background. Very skeptical these will hold up.

Watching Women - University of Toronto Press

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....

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...

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...