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<p>Reminder - Jeff's seminar is in half an hour.</p>
<p>C<br>
</p>
<div class="moz-cite-prefix">On 22/11/2021 13:33, Chris Usher wrote:<br>
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cite="mid:caea4e83-6352-565f-0b78-832ebc606b7f@astro.su.se">
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<p>Hello</p>
<p>On Friday the 26th we have the next astronomy seminar with Jeff
Cooke (Swinburne University of Technology) at 10:30 via Zoom.</p>
<p><b>The Deeper, Wider, Faster program and the Keck Wide-Field
Imager</b> </p>
<p> In this talk, I will first discuss the Deeper, Wider, Faster
(DWF) program, an innovative all-wavelength program chasing the
fastest bursts in the Universe. Fast transients with
millisecond-to-hours durations are observed and predicted at all
wavelengths, such as fast radio bursts (FRBs), supernova shock
breakouts, GRBs and their afterglows, X-ray bursts, Type Ia
supernova/companion star collisions, kilonovae, blitzars, and
other exotic events, with most classes having no detections or a
few serendipitous observations to date. DWF coordinates over 80
radio through gamma-ray telescopes and particle detectors
located on every continent and in space to simultaneously gather
deep, wide-field, fast-cadenced observations before, during, and
after the fast events before they quickly fade. DWF performs
real-time (seconds) data processing and transient identification
to trigger rapid-response spectroscopy and imaging on
program-coordinated 8m-class optical, radio, and high-energy
telescopes and DWF coordinates later-time observations, as some
fast transients are associated with longer-duration events
(e.g., supernova shock breakouts). I will conclude by discussing
the proposed Keck Wide-Field Imager (KWFI), a UV-sensitive
optical (3000-10000A) imager that will be the most powerful
wide-field imager in the world for the foreseeable future. KWFI
will progress fast transient science, as well as nearly every
other area of astronomy, from the solar system to the high
redshift Universe, including radio, high-energy, and
gravitational wave research. I will describe how KWFI, with its
extreme depths and blue sensitivities (e.g., m ~ 28 in ~1-2 hrs)
over wide fields, will enable science that cannot be done on any
other telescope, including future 30m-class telescopes, and will
provide deep photometry essential for upcoming facilities, such
as the E-ELT, wide-field 10m-class spectrographs, gravitational
wave detectors, and the JWST, Roman, and Euclid space missions.</p>
<p>We are trying something new this year with leaving the Zoom
call open after the formal hour of the seminar is up to allow
the speaker, if they wish, to chat informally with anyone who is
interested.</p>
<p>Thanks<br>
<br>
Chris and Tine</p>
<p>Christopher Usher is inviting you to a scheduled Zoom meeting.
<br>
<br>
Topic: Astronomy Seminar - Jeff Cooke <br>
Time: Nov 26, 2021 10:30 AM Stockholm <br>
<br>
Join Zoom Meeting <br>
<a class="moz-txt-link-freetext"
href="https://stockholmuniversity.zoom.us/j/63061726531?pwd=WWtYVVRwR3ZtZFhGR3Foa1pBWnE1QT09"
moz-do-not-send="true">https://stockholmuniversity.zoom.us/j/63061726531?pwd=WWtYVVRwR3ZtZFhGR3Foa1pBWnE1QT09</a>
<br>
<br>
Meeting ID: 630 6172 6531 <br>
Passcode: Ye29K5r85t </p>
<p><br>
</p>
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