Ian Harrison

Workmanlike cosmologist.

[Ian Harrison @itrharrison]

I basically stopped tweeting a few months ago. I still get a lot of interesting info from twitter, but I didn't know what I was contributing anymore.

[Ian Harrison @itrharrison]

@Emma_Alexander @NAM2023_Cardiff 😬🤞 you stay negative. Seems very mild so far. It was my first big conference not wearing a mask and lo and behold my first COVID!

[Ian Harrison @itrharrison]

Hi #nam2023 @NAM2023_Cardiff I have a positive COVID test too. Sorry!

[Ian Harrison @itrharrison]

@OJ_Astro Do you have a non-twitter way of expressing interest? I can imagine some interested people are not on here!

[Astronomy on Tap Cardiff @AoT_Cardiff]

Warm greetings, astronomy fans and space enthusiasts! Here's what you've all been waiting for - Astronomy on Tap Cardiff! Four evenings of astronomy and space talks held in the City Center TOTALLY FREE! Secure your ticket here https://t.co/mT5wHUMLGi and read more below...

[Ian Harrison @itrharrison]

This is absolutely perfect and I am 10,000% on board. Worth breaking my twitter silence for.

[Michael Baym @baym]

<chefs kiss>
https://t.co/exbvGWcCh9

[Pythagorean Astronomy @AstroPythag]

The latest episode is out, in which @zemogle and @chrisenorth discuss supernovae, exoplanets and rovers.

@itrharrison & @Dr_Whatson explain what we're learning by looking at the dawn of time.

New podcast home - https://t.co/cp4NbXNaqZ

(+ https://t.co/LdBGyG60VP of course)

[Ian Harrison @itrharrison]

@timdavisastro can you add "...using the Bagger 288"?

[NAM2023 - Cardiff @NAM2023_Cardiff]

The SOC and LOC of the @RoyalAstroSoc UK National Astronomy Meeting 2023 (hosted at @cardiffuni @cardiffPHYSX) are happy to announce the call for session proposals is now live on the conference website https://t.co/Qh6RHxBzTb! (1/3)

[Ian Harrison @itrharrison]

Origin and future of CMB telescopes (with me inside them): earlier this year in a @SimonsObs SAT and this afternoon underneath Penzias and Wilson's Horn Antenna.

[Ian Harrison @itrharrison]

I used the word "corollary" incorrectly on a telecon yesterday, as if I didn't already have enough to keep me awake at night.

[Ian Harrison @itrharrison]

@NikoSarcevic “indentationerror expected an indented block” followed by mixing tabs and spaces

[Ian Harrison @itrharrison]

After all these years I finally made it to the top.

[Ian Harrison @itrharrison]

@AstroJoeC I made this for a intro stats course a few years ago and got zero reaction.

[Erminia Calabrese @ermcalabrese]

UK cosmologists/astronomers interested in future opportunities with the @SimonsObs join us in September at the RAS for an SO UK community meeting! https://t.co/MlPqqol5aV

[Chris Lovell @chrisclovell]

New paper day, attempting to answer the question - are any distant galaxies too big for our cosmological model? 🐘

https://t.co/2TlvMF17q6

In this study we use Extreme Value Statistics (EVS), a method for predicting the most massive object from a given distribution

[Ian Harrison @itrharrison]

"Thems the extended breaks."

...sorry, this took me a few days longer than it should.

[Ian Harrison @itrharrison]

TFW you get up at 7am whilst on holiday to finish an application, then rather than sending properly it just silently sits in your outbox over the weekend. 😕

[Agnès Ferté @agnes_cosmos]

@theDESurvey @jlynnmuir Tests of gravity on cosmological scales 👇
Mainly purple (WL+RSD) versus red dashed (CMB+RSD).

[Ian Harrison @itrharrison]

@philipbull (ofc I understand it is not just like one person just "got there")

[Ian Harrison @itrharrison]

Is there a course somewhere someone can recommend which would help me practice the skill of /looking at a problem and then writing down the likelihood/?

[Ian Harrison @itrharrison]

@philipbull The specific case in my head this morning is eq.7 here: https://t.co/p9IHkn3XbN For sure I understand the steps getting to it, but I could not have gotten there myself (I think at least in part) due to lack of practice on simpler (but not trivial) examples.