Archive for November, 2023

Euclid Early Release Observations

Posted in Euclid, The Universe and Stuff with tags , , , , , , , , on November 7, 2023 by telescoper

So today’s the day. The first science-quality observations from Euclid have now been released to the public. The official press release is here, and the press conference showcasing the new observations can be viewed here:

The images themselves can be found in this repository. In summary they are (in no particular order):

  1. Galaxies in the Perseus Cluster
  2. Spiral galaxy IC 342
  3. Irregular galaxy NGC 6822
  4. Globular cluster NGC 6397
  5. The Horsehead Nebula

And here they are – you can click on them to make them bigger:

A few points of my own.

First, it is important to realise that these observations are not part of the full Euclid survey, which will start in early 2024, but were produced during the process of verification the capabilities of the telescope and detectors. They are all very short exposures, taking up less than a day to make all the images, but they demonstrate that Euclid is performing very well indeed!

Euclid is designed to achieve very sharp optical quality across a very wide field of view, so its strength is that it will produce beautiful images like these not only of a handful of objects but for billions. We need to map very large numbers of galaxies to perform the careful analysis needed to extract information about dark matter and dark energy, which is the main goal of the mission.

While these images are, in a sense, by-products of the Euclid mission, not specifically related to the main aims of the mission, they are interesting in their own right and there are proper scientific papers related to each of the five sets of observations released today. We expect many more non-cosmological spinoffs like these as the mission goes on.

There were some problems during the commissioning of the instruments carried by Euclid, the most serious of which was an issue with the Fine Guidance Sensor used to control the pointing of the telescope. This has been fixed by a software update and everything is now functioning well, as today’s new results confirm!

Euclid Update!

Posted in Euclid with tags , , , on November 6, 2023 by telescoper

Just one more sleep before the first actual science images from European Space Agency’s Euclid mission are released tomorrow. These are called the Early Release Observations (EROs) – they aren’t part of the full survey, but are to demonstrate the performance of the telescope and detectors.

There has been a slight change to the schedule advertised here so the press conference will now take place on Tuesday 7th November at 14.15 Central European (not Summer) Time, CET, which is 13.15 GMT. For more details, see here.

You can watch the press conference on the new ESA Web TV channel or on the Youtube Live Stream. I’ll post a quick update tomorrow after the images go public.

To the Warmongers – Siegfried Sassoon

Posted in History, Poetry, Politics with tags , , on November 6, 2023 by telescoper

As we approach Remembrance Sunday in a time of rising conflict, it seems apt to post the following poem written by Siegfried Sassoon, called the To the Warmongers:

I’m back again from hell
With loathsome thoughts to sell;
Secrets of death to tell;
And horrors from the abyss.
Young faces bleared with blood,
Sucked down into the mud,
You shall hear things like this,
Till the tormented slain
Crawl round and once again,
With limbs that twist awry
Moan out their brutish pain,
As for the fighters pass them by.
For you our battles shine
With triumph half-divine;
And the glory of the dead
Kindles in each proud eye.
But a curse is on my head,
That shall not be unsaid,
And the wounds in my heart are red,
For I have watched them die.

Back to Barcelona!

Posted in Art, Barcelona, Biographical with tags , , on November 5, 2023 by telescoper

After a brief sojourn in not-Barcelona, I’m about to start the trip back. I have a busy week ahead so I hope the journey is relatively stress-free. I’ll be making another trip in a few weeks to a different part of not-Barcelona and I really need to finish a couple of things before then.

Anyway, lacking the time for a longer post, I thought I’d post a little art quiz. Without googling, or any other form of cheating, can you identify the artist who painted this:

Name the Artist

I’ll post the answer when I get back to Barcelona.

UPDATE 1: the journey wasn’t bad at all. My plane was a bit late but the arrivals process at Barcelona was super-efficient and I walked straight out of the Terminal building and onto the excellent Aerobus which took me to Plaça de Catalunya, which is a five-minute walk from my apartment. As I expected, it’s quite a lot warmer in Barcelona than in not-Barcelona.

UPDATE 2: The painting is called Science and Charity and it is attributed to Pablo Ruiz Picasso (although his father José Ruiz -also a painter – may have helped him. In any case, Picasso was only about 15 years old when he painted it. I don’t think it’s a really great painting – the composition looks a bit stiff and contrived to me – but it is interesting to see the young Picasso experimenting in a style that could be describe as social realism and which is very far from his later work. Incidentally, Picasso signed his early work Pablo Ruiz, but his signature subsequently evolved to Pablo Ruiz Picasso to Pablo R Picasso to Pablo Picasso and finally to Picasso. People have wondered why he did that, but it’s probably just because he wanted to be distinctive: Ruiz is a fairly common name in Spain whereas Picasso is not.

Luck, Privilege and Academia

Posted in Biographical with tags , , , on November 4, 2023 by telescoper

Quite a few times on this blog I have acknowledged the tremendous amount of luck I have had all the way through my career, not least that the opportunity which led to my current position in Maynooth came up when exactly when it did. Another thing that has played a role has been privilege, defined not only in terms of race and social class but also educational and institutional background. Those of us who have benefitted from this are often blind to its influence, preferring to think we achieve things purely on merit.

This morning I read a piece by Izzy Jayasinghe that articulates similar thoughts from the point of view of the author’s own personal experiences. It’s a piece that’s very well worth reading and puts things better than I’ve ever managed to do.

The main point of this post is to draw attention to Izzy’s article, but I thought I’d take the opportunity to pass on links to another couple of pieces I have mentioned on this blog over the years.

The first is a paper on the arXiv by Brian Skinner, which has the abstract:

One of the major benefits of belonging to a prestigious group is that it affects the way you are viewed by others. Here I use a simple mathematical model to explore the implications of this “prestige bias” when candidates undergo repeated rounds of evaluation. In the model, candidates who are evaluated most highly are admitted to a “prestige class”, and their membership biases future rounds of evaluation in their favor. I use the language of Bayesian inference to describe this bias, and show that it can lead to a runaway effect in which the weight given to the prior expectation associated with a candidate’s class becomes stronger with each round. Most dramatically, the strength of the prestige bias after many rounds undergoes a first-order transition as a function of the precision of the examination on which the evaluation is based.

arXiv: 1910.05813

You can read the full paper here. The author acknowledges the role that blind luck played in his own career but also develops a simple mathematical model of prestige bias. It’s an interesting paper, well worth a read.

Luck plays a definite role in winning grant funding. Having been on grants panels I’m away that many very good proposals are not funded. A scoring system is generally used that introduces some level of objectivity into the process, but the fact is that a lot of proposals come out with similar scores and the ranking of these is a bit arbitrary. A slightly different panel would produce slightly different scores, but perhaps a large difference in ranking would result.

This is one of the issues discussed in a paper on the arXiv (by Pluchino et al) with the title Talent vs Luck: the role of randomness in success and failure that discusses the role of good fortune in scientific careers. This is the abstract:

The largely dominant meritocratic paradigm of highly competitive Western cultures is rooted on the belief that success is due mainly, if not exclusively, to personal qualities such as talent, intelligence, skills, efforts or risk taking. Sometimes, we are willing to admit that a certain degree of luck could also play a role in achieving significant material success. But, as a matter of fact, it is rather common to underestimate the importance of external forces in individual successful stories. It is very well known that intelligence or talent exhibit a Gaussian distribution among the population, whereas the distribution of wealth – considered a proxy of success – follows typically a power law (Pareto law). Such a discrepancy between a Normal distribution of inputs, with a typical scale, and the scale invariant distribution of outputs, suggests that some hidden ingredient is at work behind the scenes. In this paper, with the help of a very simple agent-based model, we suggest that such an ingredient is just randomness. In particular, we show that, if it is true that some degree of talent is necessary to be successful in life, almost never the most talented people reach the highest peaks of success, being overtaken by mediocre but sensibly luckier individuals. As to our knowledge, this counterintuitive result – although implicitly suggested between the lines in a vast literature – is quantified here for the first time. It sheds new light on the effectiveness of assessing merit on the basis of the reached level of success and underlines the risks of distributing excessive honors or resources to people who, at the end of the day, could have been simply luckier than others. With the help of this model, several policy hypotheses are also addressed and compared to show the most efficient strategies for public funding of research in order to improve meritocracy, diversity and innovation.

arXiv: 1802.07068

Postscript: I remember a conversation I once had with Lev Kofman – a far more significant scientist than me – during which he called me a “fucking lucky bastard” because of some guesswork that led to a result in a paper of mine that turned out to be right. For a moment I thought he was being abusive but then, with a smile, he added “Welcome to (the)* Club”.

*Lev, like many Russians, never really got the hang of articles; the definite article in parentheses is my addition.

P.S. My good fortune in surviving academia, of course, pales into insignificance when compared to this.

Preparing for Euclid’s First Images

Posted in Euclid, The Universe and Stuff with tags , , , on November 3, 2023 by telescoper

Another quick update about the release of the Early Release Observations (EROs) from Euclid, due to take place next Tuesday 7th November. For one thing, here is a little taster video.

Five images will be released on Tuesday. I know what the Early Release Observations are but you will have to wait until Tuesday to find out. If I told you now I’d have to kill you…

Gold or Green?

Posted in Open Access, Television with tags , , , on November 2, 2023 by telescoper

During my talk yesterday I mentioned the difference between “Green” and “Gold” forms of Open Access, which always makes me think of a scene from Blackadder II. I mentioned this in the talk and it seems not everyone in the audience was aware of the cultural reference, so here is the clip in question. It doesn’t have anything to do with Open Access, of course, but I think it is very funny.

The 21 Group – Update

Posted in Harassment Bullying etc with tags , , , on November 2, 2023 by telescoper

You may have read last week (26th October) a guest post on this blog by Wyn Evans about the launch of the 21Group:

Following this post, the launch of this group has now been covered by the Times Higher

https://www.timeshighereducation.com/news/bullying-support-network-launched-due-universities-inaction

and Nature

https://www.nature.com/articles/d41586-023-03418-3

I’ll update this post with further relevant links if and when I find them; you can also follow the campaign on the 21Group blog.

I very much hope this initiative succeeds in its aims, though it has powerful reactionary forces arrayed against it.

In other news, I’m told that the University of Manchester has blocked access to the 21group website by staff through centrally-managed devices. This may be inadvertent, but if it’s deliberate then it is both sinister and stupid.

Flying visit to Cardiff

Posted in Biographical, Cardiff, Open Access with tags , , , , on November 1, 2023 by telescoper

I got up at 3am this morning to take a bus to an airport, then a flight to Bristol Airport, then another bus to Bristol Temple Meads, and then a train to Cardiff in order to give a seminar. Now I’m in the middle of the reverse process, having a pint in Bristol Airport.

In case you’re thinking of using Bristol Airport at any time in the next 8 weeks, then please bear in mind that there are major roadworks on the approach road, so be sure to allow extra time. It took over an hour from Bristol Temple Meads this evening, more than double the usual time, and it’s only 8 miles…

I’m more than a little tired after all that, but it was still very nice to meet up with friends and former colleagues again. I was particularly delighted to learn that Professor Haley Gomez has been appointed Head of the School of Physics and Astronomy. Congratulations to Haley!

I’ll upload the slides from my talk when I get back to base. For the time being, however, I’m just going to chill in the departure lounge before my return flight.

Update: the return leg ran to schedule so here, as promised, are the slides for the talk I was invited to give:

P.S. I’ll be giving two talks on the same theme later this month in different institutes in France.