The NASA LISA Study Team welcomes seven new members to it's ranks! For information about the current NLST membership and alumni who have stepped down, please consult the Study Team Roster.
NASA welcomes nominations, including self-nominations, for new members of the NASA LISA Study Team (deadline: October 11, 2019). We particularly encourage people of diverse backgrounds, skills, career stages, and viewpoints to apply. See the full text of the call and application instructions for more information.
Astronomers using the Zwicky Transient Facility (ZTF) have announced the discovery of ZTFJ1539+5027, a pair of white dwarfs that orbit one another roughly every seven minutes. This system will be a strong LISA source, detecable after roughly one week of observing and with a total signal-to-noise ratio of nearly 200 in a four-year LISA mission.
The first results from the Laser Ranging Instrument (LRI) on the Gravity Recovery and Climate Experiment Follow On (GRACE-FO) mission were published in Physical Review Letters on July 19th, 2019. The GRACE-FO mission maps the Earth's gravity field by precisely tracking the relative positions of a pair of spacecraft that orbit the Earth. The LRI makes these measurements using heterodyne laser interferometry, the same technique that will be used for LISA. These first results from LRI demonstrate nanometer-level precision over the 220km range between the GRACE-FO satellites.
The Event Horizon Telescope project, an international effort to link radio telescopes across Earth to build a planet-sized telescope with superb angular resolution has made the first image of a black hole. The image is of gas surrounding a black hole of nearly six billion solar masses in the galaxy M87. LISA will measure the mergers of massive black holes which are the ancestors of these supermassive black holes.
O3, the third observing run of the advanced ground-based gravitational wave detectors has begun after the LIGO and Virgo teams have spent over a year upgrading their instruments to improved sensitivities. O3 is expected to last for a full year with increased event rates. O3 will also feature low-latency, public alerts which will enable follow-up of gravitational wave events by a variety of astronomical facilities.
The LIGO Scientific Collaboration has released the results from their first two observing runs which includes four new black hole mergers in addition to the six previously-announced black hole mergers and the one neutron star merger. Details can be found on LIGO's O1/O2 catalog page.
The first data set for the LISA Data Challenge has been released by the LISA Consortium. If you'd like to try your hand at extracting gravitational wave sources from simulated LISA data, you can download tools and data at the Data Challenge Website. The deadline for entries to this first challenge will be near the end of 2018.