Astroparticle professor at KTH in Stockholm. Deputy Dean, School of Engineering Sciences. Views expressed are mine alone.
Joined February 2009
- Tweets 1,920
- Following 801
- Followers 449
- Likes 41
649 Photos and videos
15 Dec 2022
A little late, but post-ceremony and post-dinner. A celebration of science!
1
2
Mark Pearce retweeted
Read more about the #NobelPrize in #Physics 2022!
Press release, #PopularScience Background and Scientific Background: kva.se/en/news/the-nobel-pri…
Photo: Mikael Sjöberg
2
3
12
Mark Pearce retweeted
19 Sep 2022
Nytt nummer av @PopAst just dropped! Skriver om min resa till Kiruna och Esrange där ballongteleskop studerar himlens ljusaste stjärna (gissa vilken det är!) och mörkaste svarta hål. Ping @SSCspace @SuperTigerLDB @Sunrise_III @markp8183
1
5
19
3 Aug 2022
Looks like we’ll soon get our hands on hardware again.
3 Aug 2022
The NASA C130 arrived in Norman Wells, NWT to take XL-Calibur to @NASA_Wallops
1
The XL-Calibur telescope and parachute landed near Délı̨nę, N.W.T., about 20 kilometres away from where the balloon ended up.
cbc.ca/1.6527713
2
7
17
20 Jul 2022
Phew.
19 Jul 2022
The Royal Mounted XL-Calibur Rescue Rangers got eyes on XL-Calibur. Looks good. Not in a lake and just missed some tree!
2
18 Jul 2022
And here’s the flight-path.
8
After a particularly beautiful launch from the Esrange, the XL-Calibur balloon (@SuperTigerLDB, @WUSTL, @NASA_Wallops, @kthuniversity) is now on its 4-day trip to Canada. Along the way, the onboard telescope will examine black holes and neutron stars 💫🔭 sscspace.com/blog/2022/07/13…
6
24
12 Jul 2022
XL-Calibur’s progress. We should reach Victoria Island (far left of map) in approx 5-7 days time.
1
5
12
Mark Pearce retweeted
12 Jul 2022
I natt klockan 1:45 lyckades KTH:s forskarteam få upp ballongen med det enorma röntgenteleskopet XL-Calibur, som ska mäta svarta hål, på Esrange i Kiruna. Läs en intervju med professor Mark Pearce, @markp8183, om rymduppdraget: kth.se/om/nyheter/centrala-n…
ALT Här syns det 12 meter långa och två ton tunga röntgenteleskopet XL-Calibur uppe i rymden med solen till vänster.
4
20
Mark Pearce retweeted
11 Jul 2022
Liftoff for the XL-Calibur scientific balloon mission! 🎈
Using the precision-pointing capabilities of the Wallops Arc Second Pointer system, the XL-Calibur X-ray telescope will measure the X-rays from black holes and neutron stars in our galaxy.
3
17
80
Mark Pearce retweeted
12 Jul 2022
Up, up, and away! Congrats to the XL-Calibur team on a successful balloon launch from Kiruna, Sweden. While it floats, the payload will measure the X-rays from black holes and neutron stars in our galaxy.
Follow the balloon's flight path here: go.nasa.gov/3c78kww
11 Jul 2022
Liftoff for the XL-Calibur scientific balloon mission! 🎈
Using the precision-pointing capabilities of the Wallops Arc Second Pointer system, the XL-Calibur X-ray telescope will measure the X-rays from black holes and neutron stars in our galaxy.
2
20
78
12 Jul 2022
Truss is elevated. We are homing in on the Crab. Exciting… even with lack of sleep!
4
12 Jul 2022
We’re now at 39 km altitude. Float altitude is near. After commissioning of pointing system and final polarimeter tuning we can start observing!
1
9