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<p>Dear all,</p>
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<div style="margin-top:0px; margin-bottom:0px"><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size:15px"><font face="Calibri,Helvetica,sans-serif,serif,EmojiFont" size="3" color="black"><span style="font-size:12pt">our
next Extreme Object meeting will be </span></font><font face="Calibri,Helvetica,sans-serif,serif,EmojiFont" size="3" color="black"><span style="font-size:12pt"><b>next Thursday, 24th of March, at 13:15 (CET).</b></span></font><font face="Calibri,Helvetica,sans-serif,serif,EmojiFont" size="3" color="black"><span style="font-size:12pt"> The
speaker is </span></font></span></font><span style="color:rgb(51,51,51); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif; font-size:17px; white-space:nowrap"><b><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">Mózsi
Kiss</span></b> from KTH, talking about the </span><span style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont; font-size:12pt">XL-Calibur </span><span style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont; font-size:12pt">balloon-borne </span><span style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont; font-size:12pt">polarimeter. </span><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont">See
below for title and abstract of the talk.</span></div>
<div style="margin-top:0px; margin-bottom:0px"><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size:15px"><font face="Calibri,Helvetica,sans-serif,serif,EmojiFont" size="3" color="black"><span style="font-size:12pt"><br>
</span></font></span></font></div>
<div style="margin-top:0px; margin-bottom:0px"><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size:15px">
<div style="margin-top:0px; margin-bottom:0px"><font face="Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" size="2" color="black"><span style="font-size:16px"><font size="3"><span lang="en-US" style="font-size:12pt"><b>To
join the meeting:</b></span></font></span></font></div>
<div style="margin-top:0px; margin-bottom:0px"><font face="Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" size="2" color="black"><span style="font-size:16px"><span lang="en-US">https://stockholmuniversity.zoom.us/j/65883589027?pwd=RGxJOUVQWmNtMlZFMUIwaHRabkExdz09</span></span></font></div>
<div style="margin-top:0px; margin-bottom:0px"><font face="Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" size="2" color="black"><span style="font-size:16px"><span lang="en-US"><br>
</span></span></font></div>
<div style="margin-top:0px; margin-bottom:0px"><font face="Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" size="2" color="black"><span style="font-size:16px"><font size="3"><span lang="en-US" style="font-size:12pt"><b>Meeting
ID:</b></span></font><font size="3"><span lang="en-US" style="font-size:12pt"> 658 8358 9027</span></font></span></font></div>
<div><font face="Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" size="2" color="black"><span style="font-size:16px"><font size="3"><span lang="en-US" style="font-size:12pt"><br>
</span></font></span></font></div>
</span></font></div>
<p><br>
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<div style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont; margin-top:0px; margin-bottom:0px">
<b>Title: </b></div>
<div style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont; margin-top:0px; margin-bottom:0px">
"T - 7 weeks for the XL-Calibur balloon-borne hard X-ray polarimeter"</div>
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<br>
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<div style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont; margin-top:0px; margin-bottom:0px">
<b>Abstract: </b></div>
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"XL-Calibur is a balloon-borne polarimeter for hard X-rays in the range ~10-80 keV. It is currently scheduled to be launched on a stratospheric balloon from the Esrange Space Center in northern Sweden, for a week-long flight to Canada. The system features an
X-ray mirror with a 12 m focal length and a Compton polarimeter with a b<font face="Calibri,Helvetica,sans-serif,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" size="2"><span style="font-size:16px">eryllium
scattering element surrounded by pixelated </span></font><font face="Calibri,Helvetica,sans-serif,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" size="2"><span style="font-size:16px">CZT detectors. The
giant truss is pointed and stabilized using the Wallops Arc-Second Pointer (WASP), allowing </span></font><font size="3"><span style="font-size:12pt">astronomical sources to be acquired and tracked. </span></font><font size="3"><span style="font-size:12pt">The
main observational targets are the Crab system (pulsar</span></font><font size="3"><span style="font-size:12pt">,</span></font><font size="3"><span style="font-size:12pt"> nebula) and Cygnus X-1, and observations will provide new insights into the emission
mechanisms of these sources. J</span></font><font size="3"><span style="font-size:12pt">oint observations are planned with other missions such as the recently launched IXPE, AstroSat and NICER. KTH is responsible for the anticoincidence shield surrounding
the polarimeter. In this talk, I will present the scientific instrument and our frantic preparations that will hopefully culminate in a launch in mid-May. I will also describe our two main sources and what we hope to learn about them through these observations."</span></font></div>
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<font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size:15px"><font face="Calibri,Helvetica,sans-serif,serif,EmojiFont" size="3" color="black"><span style="font-size:12pt">Hope
to see you there!</span></font></span></font></div>
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<font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size:15px"><font face="Calibri,Helvetica,sans-serif,serif,EmojiFont" size="3" color="black"><span style="font-size:12pt"><br>
</span></font></span></font></div>
<div style="font-family:Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; margin-top:0px; margin-bottom:0px">
<font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size:15px"><font face="Calibri,Helvetica,sans-serif,serif,EmojiFont" size="2" color="black"><span style="font-size:16px">Ana
Sagués Carracedo & Davide Gizzi</span></font></span></font></div>
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