1) La descarga del recurso depende de la página de origen
2) Para poder descargar el recurso, es necesario ser usuario registrado en Universia


Opción 1: Descargar recurso

Detalles del recurso

Descripción

Near-Earth asteroids (NEAs) in the 1–100 meter size range are estimated to be ~1,000 times more numerous than the ~15,000 currently cataloged NEAs, most of which are in the 0.5–10 kilometer size range. Impacts from 10–100 meter size NEAs are not statistically life-threatening, but may cause significant regional damage, while 1–10 meter size NEAs with low velocities relative to Earth are compelling targets for space missions. We describe the implementation and initial results of a real-time NEA-discovery system specialized for the detection of small, high angular rate (visually streaked) NEAs in Palomar Transient Factory (PTF) images. PTF is a 1.2-m aperture, 7.3 deg^2 field of view (FOV) optical survey designed primarily for the discovery of extragalactic transients (e.g., supernovae) in 60-second exposures reaching ~20.5 visual magnitude. Our real-time NEA discovery pipeline uses a machine-learned classifier to filter a large number of false-positive streak detections, permitting a human scanner to efficiently and remotely identify real asteroid streaks during the night. Upon recognition of a streaked NEA detection (typically within an hour of the discovery exposure), the scanner triggers follow-up with the same telescope and posts the observations to the Minor Planet Center for worldwide confirmation. We describe our 11 initial confirmed discoveries, all small NEAs that passed 0.3–15 lunar distances from Earth. Lastly, we derive useful scaling laws for comparing streaked-NEA-detection capabilities of different surveys as a function of their hardware and survey-pattern characteristics. This work most directly informs estimates of the streak-detection capabilities of the Zwicky Transient Facility (ZTF, planned to succeed PTF in 2017), which will apply PTF's current resolution and sensitivity over a 47-deg^2 FOV.

Pertenece a

Caltech Authors  

Autor(es)

Waszczak, Adam -  Prince, Thomas A. -  Laher, Russ -  Masci, Frank -  Bue, Brian -  Rebbapragada, Umaa -  Barlow, Tom -  Surace, Jason -  Helou, George -  Kulkarni, Shrinivas - 

Id.: 69617669

Versión: 1.0

Estado: Final

Tipo:  application/pdf - 

Tipo de recurso: Article  -  PeerReviewed  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

Formatos:  application/pdf - 

Requerimientos técnicos:  Browser: Any - 

Relación: [References] http://resolver.caltech.edu/CaltechAUTHORS:20170206-134306305
[References] https://authors.library.caltech.edu/74089/

Fecha de contribución: 17-nov-2017

Contacto:

Localización:
* Waszczak, Adam and Prince, Thomas A. and Laher, Russ and Masci, Frank and Bue, Brian and Rebbapragada, Umaa and Barlow, Tom and Surace, Jason and Helou, George and Kulkarni, Shrinivas (2017) Small Near-Earth Asteroids in the Palomar Transient Factory Survey: a Real-Time Streak-detection System. Publications of the Astronomical Society of the Pacific, 129 (973). Art. No. 034402. ISSN 0004-6280. http://resolver.caltech.edu/CaltechAUTHORS:20170206-134306305

Otros recursos del mismo autor(es)

  1. The cosmic gamma-ray bursts and their host galaxies in a cosmological context Studies of the cosmic gamma-ray bursts (GRBs) and their host galaxies are now starting to provide in...
  2. iPTF13beo: The Double-Peaked Light Curve of a Type Ibn Supernova Discovered Shortly after Explosion 8 pages, 5 figures, submitted to MNRAS
  3. Scientific Synergy Between LSST and $Euclid$ International audience
  4. Scientific Synergy between LSST and Euclid Euclid and the Large Synoptic Survey Telescope (LSST) are poised to dramatically change the astronom...
  5. Number Counts of GALEX Sources in FUV (1530A) and NUV (2310A) Bands This paper will be published as part of the Galaxy Evolution Explorer (GALEX) Astrophysical Journal ...

Otros recursos de la mismacolección

  1. The Gaia-ESO Survey and CSI 2264: Substructures, disks, and sequential star formation in the young open cluster NGC 2264 Context. Reconstructing the structure and history of young clusters is pivotal to understanding the ...
  2. The Dynamics of Mesoscale Winds in the Upper Troposphere and Lower Stratosphere Spectral analysis is applied to infer the dynamics of mesoscale winds from aircraft observations in ...
  3. Baroclinic Instability in the Presence of Convection Baroclinic mixed-layer instabilities have recently been recognized as an important source of submeso...
  4. The role of mixed-layer instabilities in submesoscale turbulence Upper-ocean turbulence at scales smaller than the mesoscale is believed to exchange surface and ther...
  5. Seasonality in submesoscale turbulence Although the strongest ocean surface currents occur at horizontal scales of order 100 km, recent num...

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.