Screenshot 2016-08-25 01.09.43

Gargantua at CQG+

I wrote an entry for CQG+, the companion blog to the journal Classical and Quantum Gravity. The article is aimed at someone with a general science background and includes some nice sounds comparing a standard chirp waveform with a (non-chirping) Gargantua waveform. Head over to CQG+ to check it out.

A nice upshot of the CQG+ posting is that the published version of the paper is open access for the next month. After that time has passed the article can still be found, free to read, on

Screenshot 2016-06-15 14.18.15

Second gravitational-wave transient: GW151226

The LIGO Scientific Collaboration and Virgo Collaboration just announced the second detection of gravitational waves. The detection paper can be found in Physical Review Letters. As with the first event the source was the merger of two black holes. This time the mass of the two components was 14.2 and 7.5 solar masses and the signal was observed for 55 cycles lasting ~1 second.

There will be a lot written about this event in the coming days. There is a nice summary at