Abstract
Few high-resolution video cameras have been used for observing meteors, so the orbits obtained have high uncertainty. Precise orbits are necessary so that the meteors can be integrated backwards in time and be identified with their parent body. Also, by comparing these orbits with a theoretical evolution model, the meteors can be associated with a particular dust trail. An electronic shutter system has been developed to enhance the temporal resolution for large CCD sensors. For the first time, an LH100 camera with an electronic shutter system has been tested for observing meteors. This new innovational technique has removed the theoretical upper limit – resulting from slow frame rates – to the size of CCD that can be used for the detection of meteors. Three such cameras will be installed in southern France to create a network for determining the orbits of meteors; this will be called the CAmera for BEtter Resolution NETwork (CABERNET). Here, we present preliminary results from the Geminid test campaign, which made use of this camera.
Highlights
During the past decade, for meteor astronomy, video techniques have been implemented for all-night observations, in addition to visual and photographic techniques
The International Meteor Organization (IMO) Video Meteor Network (Molau 2005), the Polish Fireball Network (Olech et al 2006), the Spanish Meteor Network (Trigo-Rodriguez et al 2007), the Dutch Meteor Society (Miskotte & Johannink 2006), the Czech Meteor Network (Koten et al 2006), the Canadian All-Sky Network (Weryk et al 2008), the California Cameras for All-Sky Meteor Surveillance (CAMS) network (Jenniskens et al 2011) and the Northern Irish Network (Atreya & Christou 2008) are a few of the meteor networks actively operating in Europe, and North America
A newly developed electronic shutter system has been integrated in the LH11000 camera
Summary
For meteor astronomy, video techniques have been implemented for all-night observations, in addition to visual and photographic techniques. Detection and analysis software such as METREC, METEORSCAN and UFO-CAPTURE can ease the tedious set-up and encourage professional and amateur astronomers alike to set up meteor stations These networks have thrived from off-the-shelf video cameras (Watec, Mintron, etc.) and lenses. Typical cameras (640 × 480 pixels), with medium-angled lenses (∼50◦), have a spatial resolution of 0.08 deg pixel−1. This corresponds to a resolution of 140 m if the meteor is at a distance of. It is only possible to identify the exact trail that caused the outburst on 2011 October 8 with high-resolution observations and a precise semimajor axis. A simple simulation was performed to identify the spread of meteors in a single image for a fixed high-resolution of 0.01 deg pixel−1 for various frame rates. One option is to use an external mechanical rotating shutter (to increase the temporal resolution) with large CCDs
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