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Dan F-M

@dfm.io

Retired computational astrophysicist Interpretability at Anthropic; prev Google DeepMind, Simons Foundation, Journal of Open Source Software (he/him) https://dfm.io // https://github.com/dfm

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03.07.2023
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Latest posts by Dan F-M @dfm.io

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GitHub - dfm/found-haikus: Haikus found on Bluesky Haikus found on Bluesky. Contribute to dfm/found-haikus development by creating an account on GitHub.

The source code for this project is on GitHub here: github.com/dfm/found-ha...

12.01.2026 13:50 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

This feed listens to the Bluesky firehose and emits triplets of posts that, when read in order, produce a haiku. I’ve done some basic filtering, but there isn’t any quality control so the poems are a bit hit or miss, but I’ve still found it strangely meditative to scroll through the feed!

12.01.2026 13:50 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

I don’t have much time in my life for fun hack projects these days, but I’ve always wanted to learn how custom Bluesky feeds work, so I managed to sneak some hacking in over the weekend while the kids were sleeping and built a β€œFound Haikus” feed: bsky.app/profile/dfm....

12.01.2026 13:50 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Apply - Interfolio {{$ctrl.$state.data.pageTitle}} - Apply - Interfolio

We're hiring Flatiron Research Fellows & Software Fellows at the @flatironinstitute.org CCA. These independent postdoc positions offer outstanding opportunities for collaboration, computation, and scientific growth in NYC: apply.interfolio.com/173402 apply.interfolio.com/173403

15.09.2025 15:12 πŸ‘ 8 πŸ” 9 πŸ’¬ 0 πŸ“Œ 0

Thank you!!

15.07.2025 22:25 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
A selfie where I have a sleeping baby on my chest. The baby is wearing a shirt with the β€œshowyourwork!” logo (https://show-your.work)

A selfie where I have a sleeping baby on my chest. The baby is wearing a shirt with the β€œshowyourwork!” logo (https://show-your.work)

Don’t worry - we’re still repping open publishing models over here… 😍

15.07.2025 18:59 πŸ‘ 17 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
A screenshot of an iOS notification from Slackbot that says β€œYou have been removed from the private channel joss by Arfon Smith”

A screenshot of an iOS notification from Slackbot that says β€œYou have been removed from the private channel joss by Arfon Smith”

Now that I don’t work in astro research anymore (and because I’m on parental leave), it is time to retire from @joss-openjournals.bsky.social. It’s been an amazing 5 years supporting open source software in academic astrophysics, and I’m excited to see what the future holds for JOSS!

15.07.2025 18:56 πŸ‘ 22 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Given the groans that echo through the entire astronomical community every time it hits the news again, I'm not sure this is a fact that needs to be publicized… 🫠

20.04.2025 01:15 πŸ‘ 14 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
Preview
Flatiron Institute Center for Computational Astrophysics Pre-Doctoral Program Flatiron Institute Center for Computational Astrophysics Pre-Doctoral Program on Simons Foundation

Applications are open for #FlatironCCA's 2025-2026 Pre-Doctoral Program. Participants will collaborate with scientists on a project complementary to their thesis for 4.5 months at the Flatiron Institute. Stage 1 applications due 3/14: www.simonsfoundation.org/flatiron-ins... #science #astrophysics

28.02.2025 19:39 πŸ‘ 7 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0
Program Description A Software Engineering Workshop for Astronomy

Hey bluesky! Do you want to develop your own open-source software in Python? Apply to attend Code/Astro!

Website: semaphorep.github.io/codeastro/
Scroll all the way down for the application link. :) Apps are due Feb 1! (1/2)

04.01.2025 02:22 πŸ‘ 72 πŸ” 33 πŸ’¬ 3 πŸ“Œ 8
Advent of Code 2024

Now that I write code as a full-time job, I didn't think I would do adventofcode.com this year, but I couldn't stop myself. I just finished collecting all the stars, and it was great fun as always! Thanks for the fun ride, @was.tl!

25.12.2024 12:29 πŸ‘ 18 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

So bad! We haven't seen the "baby loves" books yet, so I'm glad to hear that there are some better options in the genre πŸ˜€

10.12.2024 12:19 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

When my kid was born, we were gifted all of those "Science X for Babies" books (IYKYK), and at 1.5 he has decided that they are the only books we ever read just to spite us…

At least he reaches for "Bayesian Probability" more frequently than "Astrophysics", proving that he's my child! 🀣

08.12.2024 22:59 πŸ‘ 16 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Research Scientist (Open Rank), Center for Computational Astrophysics | American Astronomical Society Position Summary The Center for Computational Astrophysics (CCA) is advertising an open-rank search for research scientists to join the Flatiron Institute at the Simons Foundation. The advertised posi...

We @flatironinstitute.org are hiring a research scientist (open rank) at the CCA! Our priority areas are (1) plasma, (2) cosmological surveys, (3) stellar theory, (4) machine learning in astro, and (5) software & statistical techniques for astro. Reach out if yr interested!
πŸ”­
aas.org/jobregister/...

26.11.2024 16:54 πŸ‘ 22 πŸ” 15 πŸ’¬ 1 πŸ“Œ 3

Prompted by this and a need for distraction I Did Some Math. Turns out most extrasolar planets are quite cauliflower-compatible. A thread, with citations. And laboratory astrophysics. And footnotes.

01.12.2024 22:21 πŸ‘ 338 πŸ” 99 πŸ’¬ 9 πŸ“Œ 40
tinygp β€” tinygp

The values there are actually used as an initial guess for the optimization. It is circular, but in any real world application you'll also need to provide decent (whatever that means :D) initial guesses.

I mostly point people to tinygp.readthedocs.io instead of george but either should be ok.

20.07.2024 16:56 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Actually, I lied. You can use:

from numpy import sin as sine

but (I think?) not

import numpy.sin as sine

So there is a difference in that direction. But for modules they should be the same!

16.07.2024 20:45 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

I don't think there is any difference! I certainly use the two interchangeably and I'm having trouble thinking up potential pitfalls…

16.07.2024 20:42 πŸ‘ 2 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Some news: in a few weeks I'll be leaving the Flatiron Institute to join Google DeepMind where I'll be working on the JAX core dev team.

It's bittersweet to leave astro which (for better or worse) has defined much of my identity for the past 15 years, but I'm excited about new adventures!

11.04.2024 15:15 πŸ‘ 19 πŸ” 0 πŸ’¬ 6 πŸ“Œ 0
Post image

Thrilled to announce an event I've long been thinking about! Join us at Yale University for a "Hack Day Conference," in which a group of educators come together to build resources and exercises for teaching research methods in astronomy. See astrocodex.github.io for more.

05.03.2024 18:00 πŸ‘ 15 πŸ” 8 πŸ’¬ 3 πŸ“Œ 2

Delighted to announce that the inaugural New York Area Exoplanets Meeting (NYAEM) will take place at the Center for Computational Astrophysics (CCA) on May 30th, 2024! Abstract submission is open until April 5th, & registration until May 1st.

Find more information here: nyexoplanets.github.io πŸ”­πŸͺπŸ§ͺ

04.03.2024 15:45 πŸ‘ 15 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0

Reposting for the weekday crowd!

26.02.2024 15:41 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I'm not on the astro lists here... Please share this there if you are. Thanks!

24.02.2024 13:20 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Applications are open for the pre-doc program at the CCA!

This program is for current astro grad students to come visit NYC for 5 months and collaborate with a CCA scientist on a research project. I ❀️ this program so much!!

Please apply and/or share!

www.simonsfoundation.org/flatiron-ins...

24.02.2024 13:17 πŸ‘ 16 πŸ” 21 πŸ’¬ 0 πŸ“Œ 7

just found a jar of jam in our cupboard with a best before date of Feb 2020. that jam really is from a different era!

19.02.2024 20:02 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Are you an astronomer or aspiring astronomer wanting to improve your software engineering skills? Applications for Code/Astro 2024 are open! More info at semaphorep.github.io/codeastro/. Application is linked at the bottom of that page. Apply by Feb 16!

18.01.2024 00:55 πŸ‘ 17 πŸ” 13 πŸ’¬ 0 πŸ“Œ 1

I once (many years ago) followed a recipe for pesto which included "3 garlics", and I said "3 full garlics is way too much… let's start with just 1!" It was almost edible.

18.12.2023 21:30 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Today's #AdventOfCode is coming for your Large Scale Structure research program! adventofcode.com/2023/day/11

11.12.2023 15:43 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Part 2 of day 1 was so much more tricky than it should have been as a warm up! I definitely would recommend doing whatever you can to just move past it πŸ˜€

03.12.2023 17:07 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Haha! Yeah, "finishing AofC" is always a big ask so we'll see how far we get this year… 🀣

27.11.2023 19:33 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0