@markp8183

Astroparticle professor at KTH in Stockholm. Deputy Dean, School of Engineering Sciences. Views expressed are mine alone.

 Stockholm, Sweden
kth.se/profile/pearce/
Joined February 2009
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649Media
A little late, but post-ceremony and post-dinner. A celebration of science!
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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
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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
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Looks like we’ll soon get our hands on hardware again.
XL-Calibur@SuperTigerLDB3 Aug 2022
The NASA C130 arrived in Norman Wells, NWT to take XL-Calibur to @NASA_Wallops
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Mark Pearce retweeted
CBC News
@CBCNews22 Jul 2022
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
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Phew.
XL-Calibur@SuperTigerLDB19 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!
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More than happy to second that! @SSCSpaceSverige
XL-Calibur@SuperTigerLDB18 Jul 2022
All packed up! @SSCspace have been great hostsd
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And here’s the flight-path.
XL-Calibur@SuperTigerLDB18 Jul 2022
XL-Calibur flight track
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Mark Pearce retweeted
SSC Space@SSCspace13 Jul 2022
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…
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XL-Calibur’s progress. We should reach Victoria Island (far left of map) in approx 5-7 days time.
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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…
Här syns det 12 meter långa och två ton tunga röntgenteleskopet XL-Calibur uppe i rymden med solen till vänster.

ALT Här syns det 12 meter långa och två ton tunga röntgenteleskopet XL-Calibur uppe i rymden med solen till vänster.

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… and the moment of payload release at 01:45 this morning.
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The moment of balloon release…
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Happy team!
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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.
XL-Calibur@SuperTigerLDB11 Jul 2022
Launch!!!!
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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
NASA Wallops
@NASAWallops11 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.
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130,000 ft!
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Almost over Norway!
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Truss is elevated. We are homing in on the Crab. Exciting… even with lack of sleep!
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We’re now at 39 km altitude. Float altitude is near. After commissioning of pointing system and final polarimeter tuning we can start observing!
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