Bulletin of the American Physical Society
86th Annual Meeting of the APS Southeastern Section
Volume 64, Number 19
Thursday–Saturday, November 7–9, 2019; Wrightsville Beach, North Carolina
Session C01: Multimessenger Astrophysics I |
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Chair: Stephen Taylor, Vanderbilt University Room: Holiday Inn Resort Causeway/Masonboro |
Thursday, November 7, 2019 2:00PM - 2:30PM |
C01.00001: The Fermi Gamma-ray Space Telescope: Getting Better with Age Invited Speaker: Cori Fletcher The Fermi Gamma-ray Space Telescope (Fermi) has been observing the gamma-ray sky for over 10 years and is an important tool in multiwavelength astronomy and the growing field of multimessenger astronomy. This space-based observatory has two instruments on board, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). The LAT observes \~20\% of the sky, while GBM consists of 12 NaI detectors and 2 BGO detectors strategically placed to provide nearly full-sky coverage in search of gamma-ray bursts (GRBs). Fermi covers an unprecedented energy range from 8 keV-300 GeV and provides localizations for gamma-ray sources to an error of a few degrees for GBM, and an error of a few arcminutes for the LAT, allowing for multiwavelength instruments to follow-up these observations. Over the past 10 years of operation, Fermi has worked with many multiwavelength telescopes to provide numerous contributions to the astronomy community. A recent example of these contributions is GRB 190114C, which was an extremely bright GRB that was observed by Fermi and had a near- TeV detection in MAGIC. Another example is the joint observations of Fermi and NICER of the detection of the first galactic ultraluminous X-ray Pulsar, Swift J0243.6$+$6124. The most notable recent multimessenger detections both involving Fermi are the joint detection of GW170817 and GRB 170817A and the IceCube neutrino coincident with flaring emission from TXS 0506$+$056. These observations have motivated further follow-up campaigns in search for more multiwavelength and multimessenger counterparts in Fermi data to help provide insight into the processes occurring in these extreme events. [Preview Abstract] |
Thursday, November 7, 2019 2:30PM - 3:00PM |
C01.00002: Searching for GRBs Associated with Gravitational Waves Invited Speaker: Rachel Hamburg The joint detection of a binary neutron star merger GW170817 in gravitational waves (GWs) by Advanced LIGO/Virgo and the short gamma-ray burst GRB 170817A by the Fermi Gamma-ray Burst Monitor (GBM) hailed the beginning of gravitational-wave multi-messenger astronomy. The extraordinary properties of GRB 170817A were brought to light in context of the GW observations, spectacularly demonstrating that multi-messenger observations can maximize the science gained from astrophysical events. In this talk, we will present the capability to detect bursts like GRB 170817A through subthreshold searches of GBM data. We will also discuss GBM follow-up of LIGO/Virgo’s second and third observing runs. Finally, we will look to the future science that can made with joint GW/gamma-ray observations. [Preview Abstract] |
Thursday, November 7, 2019 3:00PM - 3:30PM |
C01.00003: Unforeseen Directions in Gravitational Wave Astrophysics Invited Speaker: Imre Bartos Since the beginning of gravitational-wave discoveries in 2015, gravitational-wave and multi-messenger observations yielded a number of "surprises". We have detected more and heavier black holes than previously anticipated; multi-messenger emission from neutron star merger GW170817 showed structured high-energy outflow and produced a multi-component kilonova; additional messengers, such as heavy elements detected on Earth proved to add new information on cosmic processes. With the current publicly announced detection rate of about one per week, the latest observing period of Advanced LIGO, Virgo and KAGRA is poised to deliver additional surprises along with moving the field towards precision astrophysics. I will review several of the new interesting directions in gravitational-wave and multi-messenger observations that began only recently and promise to further enrich this field as the rate of detections will grow twentyfold in the next five years. [Preview Abstract] |
Thursday, November 7, 2019 3:30PM - 4:00PM |
C01.00004: Multi-messenger Time-domain Astronomy: GW170817 and beyond Invited Speaker: Dario Carbone The discovery of GW170817, a binary neutron star merger detected in gravitational waves with an electromagnetic counterpart, marked the birth of multi-messenger astronomy. Joint analyses of gravitational and electromagnetic radiation from such events significantly deepen and challenge current knowledge of the Universe. This knowledge will only continue to broaden and expand when next-generation facilities in both gravitational and electromagnetic waves. I will review the incredible discovery of GW170817, emphasizing areas of opportunity for the next generation Very Large Array, such as radio polarimetry and mapping of the merger ejecta, and host galaxy studies. Finally, I will discuss the potential for future multi-messenger discoveries of binary black holes and relativistic stellar explosions. [Preview Abstract] |
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