Shared Sight: Sirens
نویسندگان
چکیده
Note to readers: This draft was prepared for a slightly different audience, so the arguments focusing on visual privacy do not appear in the text. Odd word errors may be due to speech misrecognition. Do not cite, quote, or distribute without express permission. Please refer to paragraph #s, not page #s in comments.
منابع مشابه
Delensing Gravitational Wave Standard Sirens with Shear and Flexion Maps
Supermassive black hole binary systems (SMBHB) are standard sirens – the gravitational wave analogue of standard candles – and if discovered by gravitational wave detectors, they could be used as precise distance indicators. Unfortunately, gravitational lensing will randomly magnify SMBHB signals, seriously degrading any distance measurements. Using a weak lensing map of the SMBHB line of sight...
متن کامل"You've Been Warned?": Public Perceptions of Outdoor Sirens and Their Alternatives for Tornadoes
Outdoor emergency sirens are used as a major component of the Emergency Management Agency’s Emergency Alert and Notification System in tornado-prone Alabama and many other areas of the U.S. This study examines public perceptions and reactions to the sirens for notification of tornadoes as well as perceptions of the usefulness of alternative means of notification. In April 2011 a major tornado s...
متن کاملFinding the Electromagnetic Counterparts of Cosmological Standard Sirens
The gravitational waves (GW) emitted during the coalescence of supermassive black holes (SMBHs) in the mass range ∼ (10–10)M⊙/(1+z) will be detectable out to high redshifts with the future Laser Interferometric Space Antenna (LISA). The distance and direction to these “standard sirens” can be inferred directly from the GW signal, with a precision that depends on the masses, spins and geometry o...
متن کاملShort GRB and Binary Black Hole Standard Sirens as a Probe of Dark Energy
Observations of the gravitational radiation from well-localized, inspiraling compact-object binaries can measure absolute source distances with high accuracy. When coupled with an independent determination of redshift through an electromagnetic counterpart, these standard sirens can provide an excellent probe of the expansion history of the Universe and the dark energy. Short γ-ray bursts, if p...
متن کاملOccupational exposure to noise from authorized emergency vehicle sirens.
Warning signals generated by sirens of authorized emergency vehicles should be audible and recognizable to all road users. Currently, there is no legislation in Poland defining sound pressure levels (SPLs) of audible warning signals generated by sirens of authorized emergency vehicles. Measured A-weighted SPLs of those signals range between 104 and 108 dB. While for road users, an audible warni...
متن کامل