Annual Archives


GBT Intensity Mapping Collaboration Analysis Meeting

Date: October 10th to October 13th, 2017

Location: McLennan Physics Labs, 15th floor, University of Toronto, 60 St. George Street

Organizers:  Ue-Li Pen, Philippe Berger, Kiyo Masui

Participants:  Kiyo Masui, Laura Wolz, Victor Liao, Chris Anderson, Jeff Peterson, Ue-Li Pen, Phil Berger, Nick Luciw, Viswesh Ram Marthi, Xin Wang, Patrick Breysse


09:00 EST…

Pulsar Scintillometry with VLBI

2017 is the fiftieth anniversary of the discovery of the pulsar and Very Long Baseline Interferometry (VLBI). In the past twenty years, VLBI has been used in pulsar observations to study pulsar scintillation and scattering due to density variations in the ionized interstellar medium (IISM). With VLBI, it is possible to characterize and in some cases image the scattered image of the pulsar. This…

CITA congratulates the 2017 Physics Nobel Prize laureates

The 2017 Nobel Prize in Physics was awarded to Rainer Weiss, Barry C. Barish, and Kip S. Thorne for “decisive contributions to the LIGO detector and the observation of gravitational waves.” In 2015, the LIGO Scientific Collaboration detected the gravitational waves emitted by the collision of two massive black holes over a billion light years away. This monumental discovery was the first…

A three-detector observation of a binary black hole coalescence

This afternoon, the LIGO Scientific Collaboration and Virgo Collaboration announced the fourth significant detection of gravitational waves. This event, dubbed GW170814, originated from the inspiral and collision of two black holes, located more than a billion light years away. The two black holes had estimated masses of 31 and 25 solar masses, with roughly 3 solar masses’ worth of energy…

Sackler Lecture: Gravitational-Wave Discoveries Driving the Promise of Multi-Messenger Astronomy

Sackler Speaker: Vicky Kalogera (Northwestern University)

Abstract: The LIGO detectors have opened for us a new way of studying compact objects in the time domain with direct detections of gravitational-wave bursts from binary mergers of compact objects. I will highlight what current results imply and what we can look forward to in terms of advancing our understanding of the densest…

Jamboree 2017

Targeted towards incoming postdocs/grads and anyone who wants to learn more about CITA, this is an annual event with short presentations from all CITA faculty, postdocs, and grad students describing their research. Wed, Sep 27 @ 12:00 pm Physics Lounge MP 110. Please see the program…

New TRAPPIST-1 Web App Launched

TRAPPIST-1 is the most musical system ever discovered and now you can conduct its planetary symphony by simply pressing buttons and moving sliders in a new interactive web application:

Hear the original sonification of TRAPPIST-1 and learn about what makes this system so special at

This was…

Observation of a 50-Solar-Mass Binary Black Hole Coalescence

This morning, the Laser Interferometer Gravitational-wave Observatory (LIGO) announced its third detection of gravitational waves emitted by two colliding black holes. The detection, named GW170104, was observed by LIGO on January 4, 2017 at 10:11:58 UTC with the two black holes having estimated masses of 31 and 19 solar masses. The final black hole’s mass is estimated to be around 50 solar…

How fine-tuned harmonies saves TRAPPIST-1 from destruction

Author: Dan Tamayo

In February of this year, a European-led team of astronomers announced that TRAPPIST-1, one of the 300 nearest stars to us, hosts seven Earth-like planets. Several of these could have the right temperatures to host liquid water, and are thus prime candidates in the search for life outside our solar system.

But a puzzle in the original paper was that when they tried to…

The TRAPPIST-1 Treasure Trove (Classroom Visit)

The TRAPPIST-1 Treasure Trove (Classroom Visit)

In February of 2017, astronomers announced an exciting development in our exploration of worlds beyond the solar system: not only do 7 Earth-sized planets orbit a nearby star known as TRAPPIST-1, but 3 of them may be able to support liquid water! To celebrate this discovery, the Canadian Institute for Theoretical Astrophysics and Discover t…

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