#LeaveTheDark: Easy social media shares

Posted in Uncategorized on July 26, 2016 by telescoper

My blog may be called “In The Dark” but that won’t stop me sharing this.

intothatdarkness's avatar#LeaveTheDark

Yesterday we had a request for a shareable summary of the #LeaveTheDark manifesto. That’s quite difficult to do in brief. There’s a lot to it. A more complete manifesto will follow within the next few days.

But in the meantime we thought these little images might be helpful for people who’d like to spread the word a bit. There’s no issue with copyright or anything like that. We want and need people to share our stuff. That’s the only way we’ll reach enough people to turn last week’s idea into next year’s reality! And we will make this a reality.

So feel free to download and share these images across your networks. The more the merrier…

Leavethedark we are that movement we believe.pngleaveTheDark join us we are memeleaveTheDark Join us we need

Thankyou! Together we really can make a difference and turn back the growing swell of hatred that threatens to engulf our society.

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The 3.5 keV “Line” that (probably) wasn’t…

Posted in Bad Statistics, The Universe and Stuff with tags , , , , , , , on July 26, 2016 by telescoper

About a year ago I wrote a blog post about a mysterious “line” in the X-ray spectra of galaxy clusters corresponding to an energy of around 3.5 keV. The primary reference for the claim is a paper by Bulbul et al which is, of course, freely available on the arXiv.

The key graph from that paper is this:

XMMspectrum

The claimed feature – it stretches the imagination considerably to call it a “line” – is shown in red. No, I’m not particularly impressed either, but this is what passes for high-quality data in X-ray astronomy!

Anyway, there has just appeared on the arXiv a paper by the Hitomi Collaboration describing what are basically the only set of science results that the Hitomi satellite managed to obtain before it fell to bits earlier this year. These were observations of the Perseus Cluster.

Here is the abstract:

High-resolution X-ray spectroscopy with Hitomi was expected to resolve the origin of the faint unidentified E=3.5 keV emission line reported in several low-resolution studies of various massive systems, such as galaxies and clusters, including the Perseus cluster. We have analyzed the Hitomi first-light observation of the Perseus cluster. The emission line expected for Perseus based on the XMM-Newton signal from the large cluster sample under the dark matter decay scenario is too faint to be detectable in the Hitomi data. However, the previously reported 3.5 keV flux from Perseus was anomalously high compared to the sample-based prediction. We find no unidentified line at the reported flux level. The high flux derived with XMM MOS for the Perseus region covered by Hitomi is excluded at >3-sigma within the energy confidence interval of the most constraining previous study. If XMM measurement uncertainties for this region are included, the inconsistency with Hitomi is at a 99% significance for a broad dark-matter line and at 99.7% for a narrow line from the gas. We do find a hint of a broad excess near the energies of high-n transitions of Sxvi (E=3.44 keV rest-frame) – a possible signature of charge exchange in the molecular nebula and one of the proposed explanations for the 3.5 keV line. While its energy is consistent with XMM pn detections, it is unlikely to explain the MOS signal. A confirmation of this interesting feature has to wait for a more sensitive observation with a future calorimeter experiment.

And here is the killer plot:

Perseus_Hitomi

The spectrum looks amazingly detailed, which makes the demise of Hitomi all the more tragic, but the 3.5 keV is conspicuous by its absence. So there you are, yet another supposedly significant feature that excited a huge amount of interest turns out to be nothing of the sort. To be fair, as the abstract states, the anomalous line was only seen by stacking spectra of different clusters and might still be there but too faint to be seen in an individual cluster spectrum. Nevertheless I’d say the probability of there being any feature at 3.5 keV has decreased significantly after this observation.

P.S. rumours suggest that the 750 GeV diphoton “excess” found at the Large Hadron Collider may be about to meet a similar fate.

2016 ‘Beards, Shorts & Sandals’ season reaches peak

Posted in Beards on July 26, 2016 by telescoper

The Great Question of the day..

kmflett's avatarKmflett's Blog

Beard Liberation Front

26th July Contact Keith Flett 07803 167266

2016 ‘BEARDS, SHORTS & SANDALS’ SEASON REACHES PEAK

corbynsandals

BLF permission given for official engagements only

The Beard Liberation Front, the informal network of beard wearers, has said that the 2016 Beards, Shorts and Sandals season has reached its peak in the recent warm weather in some parts of the UK.

The campaigners say that with temperatures well above 20C in some places the rise in the wearing of beards, shorts and sandals has been significant

Shorts and sandals may be worn all day until 9pm at the discretion of the wearer.

The campaigners say that the image of organic beard, shorts and sandals is one of the key male fashions of 2016 not just in Hackney and Dalston but across large parts of the UK as fashions change and develop.

The official season traditionally runs until August 31st. During…

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Return Trip

Posted in Uncategorized on July 25, 2016 by telescoper

A quick post while I’m waiting in the hotel for transport back to Venice and thence to England. It’s been a short trip but a lot of fun, with a couple of interesting discussion sessions thrown in between the eating drinking and hiking.

Unfortunately I twisted my knee near the start of yesterday’s hike. The limestone rocks around here can be very slippery! Since I’ve had a lot of problems with my knees over the years I decided to return to Base Camp. The friendly owners of the bar at the trailhead gave me a bag of ice to control the swelling and I was forced to spend the morning reclining on a sundowner with my foot up rather than hiking.

image

This seemed to work and although I’m still getting a bit of a twinge I can get about reasonably well today.

Anyway, it’s back to Blighty this afternoon for the rest of what will be my last week at the University of Sussex.

Cinque Torri

Posted in Uncategorized on July 23, 2016 by telescoper

Today I was mainly occupied with a hike to the Cinque Torri,  a group of five towering peaks about 12 km from Cortina d’Ampezzo. It wasn’t too strenuous, although the recent rains had made some of the trail a bit slippery.

The route we followed included a visit to trenches, gun emplacements and other fortifications built during the First World War. There was heavy fighting in this area, because it was the border between Austria and Italy at that time.
It must have been very grim for the soldiers dug in above the tree line, especially during the winter.

Anyway here’s a quick snap of me abour to pass through a gap in one of the rocky structures at the peak, just before we started to descend.

image

Cortina d’Ampezzo

Posted in Uncategorized on July 22, 2016 by telescoper

So here I am, then, in a small hotel just outside Cortina d’Ampezzo in the Dolomites North of Venice.

image

The occasion for this trip is provided by the recent 60th birthday of John Peacock and an informal workshop organised by some friends. I was up at crazy o’clock this morning to get the plane to Venice and we’ve been dodging  thunderstorms all afternoon but I’m sure it will be a nice weekend.

Until later!

Graduation and Beyond

Posted in Biographical with tags , on July 21, 2016 by telescoper

I’ve found a few pictures of this week’s  graduation ceremony for the School of Mathematical and Physical Sciences at the University of Sussex, at which I had the pleasure of presenting the graduands. These are taken without permission from facebook posts!

Graduation ceremonies are funny things. With all their costumes and weird traditions, they even seem a bit absurd. On the other hand, even in these modern times, we live with all kinds of  rituals and I don’t see why we shouldn’t celebrate academic achievement in this way. I love graduation ceremonies, actually. As the graduands go across the stage you realize that every one of them has a unique story to tell and a whole universe of possibilities in front of them. How their lives will unfold no-one can tell, but it’s a privilege to be there for one important milestone on their journey. Getting to read their names out is quite stressful – it may not seem like it, but I do spend quite a lot of time fretting about the correct pronunciation of the names.  It’s also a bit strange in some cases finally to put a name to a face that I’ve seen around the place regularly, just before they leave the University for good. I always find this a bittersweet occasion. There’s joy and celebration, of course, but tempered by the realisation that many of the young people who you’ve seen around for three or for years, and whose faces you have grown accustomed to, will disappear into the big wide world never to be seen again. On the other hand, this year a large number of MPS graduates are going on to do PhDs – including two who are moving to Cardiff! – so they won’t all vanish without trace!

Grad_1

Grad_3

That’s me in the front row just to the left of the Mayor, in case you didn’t realise. It was very hot with all that graduation clobber on – in fact it was over 30 degrees. Waiting for the official photographs outside in the gardens was a rather sweaty experience.

Grad_2

Graduation of course isn’t just about dressing up. Nor is it only about recognising academic achievement. It’s also a rite of passage on the way to adulthood and independence, so the presence of the parents at the ceremony adds another emotional dimension to the goings-on. Although everyone is rightly proud of the achievement – either their own in the case of the graduands or that of others in the case of the guests – there’s also a bit of sadness to go with the goodbyes. It always seems that as a lecturer you are only just getting to know students by the time they graduate, but that’s enough to miss them when they go.

Anyway, all this is a roundabout way of saying congratulations once more to everyone who graduated on Tuesday, and I wish you all the very best for the future!

Minor Swing (for the National Day of Belgium)!

Posted in Jazz with tags , , on July 21, 2016 by telescoper

Not far from the hotel in which I stayed during my visit to Ghent last week is a small but pleasant jazz bar called Minor Swing. I mentioned to some colleagues as we passed by the place that it was clearly named after the tune by Django Reinhardt (who was born in Belgium). In fact it was something of a signature tune for him. Anyway, Radio 3 reminded me this morning that today (21st July)  is Belgian National Day so I thought I’d mark the occasion on this blog by posting a version of Minor Swing that demonstrates Django’s superlative gift for melodic improvisation, together with violinist Stephane Grappelli and the Quintet of the Hot Club of France.

Let’s talk about the Black Bird

Posted in Film with tags on July 20, 2016 by telescoper

For those of you who haven’t seen the Maltese Falcon, here’s my favourite scene from the film. Everything about this is just right: perfect dialogue (from the novel by Dashiel Hammett, adapted by director John Huston), perfect acting (Humphrey Bogart and Sidney Greenstreet), and perfect lighting and camera work (credit the great cinematographer, Arthur Edeson). This film is 75 years old this year but I don’t think it has dated at all!

 

 

Leaving Party

Posted in Poetry with tags , , , , on July 20, 2016 by telescoper

As regular readers of this blog (Sid and Doris Bonkers) will know, I’m about to leave my current job as Head of School of Mathematical and Physical Sciences at the University of Sussex. Although I don’t actually finish here until the end of the month, there was a small gathering in the School this afternoon to celebrate the fact that I am leaving. Here is the cake:

Cake_leave

This was accompanied by Prosecco, opened in dangerously explosive fashion by Philip Harris, who will be taking over as Acting Head of School after my departure. As such he will be responsible for Health and Safety in the School. I hope he fills in a risk assessment before attempting to open any further bottles of bubbly! I got a lovely gift of a pair of champagne flutes, although I haven’t managed to play any music on them yet.

I’ve also been inundated with gifts by Dorothy Lamb, my Head of Schools Coordinator. Dorothy arranged a special treat for me this morning, in the form of a private screening (in the Attenborough Centre) of my favourite film, The Maltese Falcon. I’ve seen this film dozens of times on TV or on DVD but never in the cinema, so this was a very nice thought. Here’s a still from the movie, which reminds me for some reason of the Senior Management Group:

Maltese-Falcon-Tell-the-Truth-1941

At this afternoon’s cake and wine party, Dorothy also read out a poem what she wrote, which I reproduce here (including a preamble) in the hope that literary agents and talent-spotters might be reading this blog:

Those of you who read Peter’s blog will know that he regularly posts poems by Stevie Smith, Emily Dickinson, Wordsworth and others, plus occasionally his own work. The last time I wrote a poem was when I was about 8 years old and it was published in ‘The Brownie’ so I thought it fitting that, frighteningly, almost half a century on, I should pen another.

To Peter Coles, aged 53 and almost one sixth
Known for a passion for the cryptic,
Let’s hope his departure is not apocalyptic.
A northern gent in whom we trust,
An honest man, some say robust;
A wealth of knowledge, awesome talent
And, as a boss, sublime, transparent.
With Coltrane, Cohen and Humphrey Bogart
He is not backward in going forward.
With diphthongs, datives, gerunds and such
Though untrepanned, he’ll give the heads up.
A Newcastle lad up at Cambridge
Prosecco chilling in the fridge,
He truly does explain things clearly
Though I’m still ignorant of quantum theory.
He always seems to stay clear sighted
Except when it comes to Newcastle United.
A crossword never left unsolved,
An over never left unbowled,
The poems of the good and great,
The Miss Lemon drizzle cake he ate;
And every due respect he paid
To his trusted Midlands maid.
And so we say farewell to Peter,
Though this poem has the strangest meter,
Whilst lexicons fill every space,
An emptiness will take his place,
A smile of sadness on my face.