1 / 26

The Teide Observatory Tenerife Asteroid Survey (TOTAS)

The Teide Observatory Tenerife Asteroid Survey (TOTAS). Detlef Koschny (1) , Matthias Busch (2) (1): European Space Agency, ESA/ESTEC, The Netherlands (2): Starkenburg-Sternwarte Heppenheim , Germany Asteroids, Comets, Meteors 2014 30 Jun – 04 July 2014. Context.

doane
Télécharger la présentation

The Teide Observatory Tenerife Asteroid Survey (TOTAS)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Teide Observatory Tenerife Asteroid Survey (TOTAS) Detlef Koschny(1), Matthias Busch(2) (1): European Space Agency, ESA/ESTEC, The Netherlands (2): Starkenburg-SternwarteHeppenheim, Germany Asteroids, Comets, Meteors 201430 Jun – 04 July 2014

  2. Context • ESA’s SSA-NEO programme includes installation of survey telescopes • Development has started but needs time • To contribute to the international observing effort: ESA funds some European assets, uses the VLT (ESO)… • … and uses their own telescope on Tenerife

  3. The Optical Ground Station (OGS) • 1 m aperture, 10 % obstruction • Focal length 4.4 m • Back-illuminated e2v sensor, 4k x 4k; 0.65” per pixel, used with 2x2 binning • Location: Izana Observatory, Tenerife

  4. Follow-up observations Tools • NEOvisualizer – to visualize observing constraints from OGS (or any other IAU station code)http://vmo.estec.esa.int/kosde/NEOvisualizer.html • NEOtimeliner – to generate a schedule http://vmo.estec.esa.int/kosde/NEOtimeliner.html (only for J04) Priorities • NEO Confirmation Page • Spaceguard Central Node priority list • Recovery observations

  5. Survey observations • TOTAS = Teide Observatory Tenerife Asteroid Survey • Derived from SOHAS – Starkenburg Observatory Heppenheim Asteroid Survey • Planning software and data processing pipeline developed by M. Busch (author of the software EasySky)

  6. Onesurveyregion • 5 x 5 images • 4 x 4 deg • 4 revisits • Every ~15 min • Typically two survey runs per night • Typically 4 nights per month

  7. Data processinginterface GUI Completely based on an SQL database

  8. Image 1 Use the PinPoint astrometric engine to solve the plate

  9. Green: identified stars Red: Objects showing up in all images

  10. Stars and/or stationary objects removed – ‘loners’ are left

  11. Start with one loner

  12. In 2nd image: Identify loners, sort according to distance

  13. Loner too far away – reject

  14. For closest loner:Search in 3rd image for loner ?

  15. Not found… Go to loner with 2nd distance

  16. For 2nd loner in image 2: Search in 3rd image for loner

  17. Found!

  18. Found! Measure positions, prepare email. Repeat for 2nd loner in image 1 etc.

  19. Automatic data processing • Solve plate using PinPoint from DC-3 Dreams • Remove stars • Identify ‘loners’ – objects appearing on one frame only • Step through loners from image 1 4.1 Sort loners in image 2 by distance to loner 1 4.2 Take those closer than 12”/minute movement 4.3 Check whether there is a loner in image 3 in the right position 4.4 If yes, find corresponding loner in image 4 4.5 Use linear fit to find angular velocity and position angle; reject if error larger than 1” and magnitude change < 1.5 mag, min. flux is 300 DN 4.6 Search for nearby catalog objects – position difference < 40”, speed difference <0.1”/min, pos. angle difference < 3.5 deg. Else – identify as possible discovery

  20. Manual confirmation of possible discoveries • Thumbnails are posted on web page; team of ‘clickers’ performs visual validation Full images can also be uploaded and blinked via a web interface – allowing to search what the pipeline has missed!

  21. Results – 2009 - 2014 • 272 searchregions in 116 nights • 190000 positionmeasurements • 54500 real movers(184000 rejected) • 42.692 asteroids • 1.690 designations • 7 NEOdiscoveries • 1 cometdiscovery • 37 numberedobjects • 6 namedobjects 480 squaredegreesper new NEO

  22. Upcoming – the Test-Bed Telescope project • Contract with ISDEFE, Spain, to demonstrate robotic operation of NEO and space debris telescopes • Two 56-cm telescopes with 2.5 deg x 2.5 deg field • Robotic – identify objects, schedule them, task the telescope • Shared between space debris and NEOs • Hardware has been ordered (APM/Germany) • Software: Requirements review passed end 2013 • Cebreros/Spain: spring 2015 • New Norcia/Australia: fall2015 • Evolution of the TOTAS software and ISDEFE’s scheduler ‘CESAR’

  23. A bigapplauseforthecitizenscientists, our ‚clickers‘Vladimir Bezugly, Harald Bill, Matthias Busch, Jiri Doubek, Peter Geffert, Tobias Häusler, Matthias Helfert, Albert Heller, Felix Hormuth, Jost Jahn, Krysztof Kida, Marcel Klein. Andre Knöfel, Rainer Kracht, Rainer Kresken, Gerhard Lehmann, Carolin Liefke, Jürgen Lindner, Hartwig Luethen, Rafal Reszelewksi, Sergei Schmalz, Sergei Shurpakov, Patrick Schmeer, Erwin Schwab, Tobias Thommes, Andreas Willberger, Ilka Willberger, Guido Wollenhaupt, Christian ZornAdditionally:Marco Micheli, Paco Francisco Ocana(Onlythosewhoactuallyclickedarelisted)

  24. Stephen’s Quintett, 1-m + CCD, 60 s

  25. Backup slides

  26. Onesurveyregion • 5 x 5 images • 4 x 4 deg • 4 revisits • Every ~15 min • Typically two survey runs per night • Typically 4 nights per month

More Related