A5080805802- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- Inertial Sensor and Navigation
- Superconducting and THz Device Technology
- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Solar and Space Plasma Dynamics
- Currency Recognition and Detection
- History and Developments in Astronomy
- Geophysics and Gravity Measurements
- Phonocardiography and Auscultation Techniques
Center for Astrophysics Harvard & Smithsonian
2019-2020
Abstract On 2019 April 25.346 and 26.640 UT the Laser Interferometer Gravitational-Wave Observatory (LIGO) Virgo gravitational-wave (GW) observatory announced detection of first candidate events in Observing Run 3 that contained at least one neutron star (NS). S190425z is a likely binary (BNS) merger d L = 156 ± 41 Mpc, while S190426c possibly NS–black hole (BH) ever detected, 377 100 although with marginal statistical significance. Here we report our optical follow-up observations for both...
AT 2018hyz (=ASASSN-18zj) is a tidal disruption event (TDE) located in the nucleus of quiescent E+A galaxy at redshift $z = 0.04573$, first detected by All-Sky Automated Survey for Supernovae (ASAS-SN). We present optical+UV photometry transient, as well an X-ray spectrum and radio upper limits. The bolometric light curve comparable to other known TDEs declines rate consistent with $t^{-5/3}$ early times, emitting total radiated energy $E 9\times10^{50}$ erg. An excess bump appears UV about...
Abstract We present optical photometry and spectroscopy of SN 2016iet (=Gaia16bvd=PS17brq), an unprecedented Type I supernova (SN I) at z = 0.0676 with no obvious analog in the existing literature. exhibits a peculiar light curve, two roughly equal brightness peaks (≈ −19 mag) separated by about 100 days, subsequent slow decline 5 mag 650 rest-frame days. The spectra are dominated strong emission lines calcium oxygen, width only 3400 km s −1 , superposed on blue continuum first year. There...
We present the detection of an unresolved radio source coincident with position Type I superluminous supernova (SLSN) PTF10hgi ($z=0.098$) about 7.5 years post-explosion, a flux density $F_\nu(6\,\,{\rm GHz)}\approx 47.3\ \mu Jy$ and luminosity $L_\nu(6\,\,{\rm GHz})\approx 1.1\times 10^{28}$ erg s$^{-1}$ Hz$^{-1}$. This represents first emission SLSN on any timescale. investigate various scenarios for origin emission: star formation activity, active galactic nucleus, non-relativistic...
The field of time-domain astrophysics has entered the era Multi-messenger Astronomy (MMA). One key science goal for next decade (and beyond) will be to characterize gravitational wave (GW) and neutrino sources using generation Extremely Large Telescopes (ELTs). These studies have a broad impact across astrophysics, informing our knowledge production enrichment history heaviest chemical elements, constrain dense matter equation state, provide independent constraints on cosmology, increase...