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Christopher Berry Profile picture
Christopher Berry
@cplberry
#GravitationalWave astrophysicist (@LIGO). @NUCIERA BOV Research Professor/@UofGravity Lecturer. Science, education, LEGO & cake. May contain traces of nuts
Jun 23, 2020 • 5 tweets • 4 min read
#GW190814 — The mystery of a 2.6 solar mass compact object? cplberry.com/2020/06/23/gw1… #GW190814's masses are unlike anything we've seen before. The lower mass object could be a unexpectedly massive neutron star (making it our 1st neutron star–black hole), or it could be the smallest black hole ever found!

📊: media.ligo.northwestern.edu/gallery/mass-p… Masses in the stellar graveyard
Apr 18, 2020 • 22 tweets • 21 min read
Getting ready to watch my first #APSApril session on the latest @ego_virgo & @LIGO results! 🍿 Chad Hanna is reviewing our third observing run. Look at the performance of @ego_virgo, @LIGOWA & @LIGOLA. Phenomenal sensitivity and amount of observing time: at least one detector observing for >96% of the time! O3a: No interferometer observing 3.2% of the time<br /> O3b: No interferometer observing 3.4% of the time
Jan 14, 2020 • 9 tweets • 8 min read
New gravitational-wave candidate?
gracedb.ligo.org/superevents/S2…
#S20014 was found by an unmodelled burst search, I'm always skeptical of these, as they are easily confused with glitches
False alarm rate: 1 per 25 yr
Rating: 🧙‍♂️😐 Initial sky localization. 90% area 400 sq deg #S20014 looks to be low frequency, it's central frequency is around 65 Hz
gcn.gsfc.nasa.gov/notices_l/S200…
Extremely heavy black hole mergers could be in this range. These signals are short. They can be found by burst searches and missed by template searches (there's not much to match)