Presentation is loading. Please wait.

Presentation is loading. Please wait.

Astronomical Video Reduction Software 1 Hristo Pavlov IOTA 2011, 17 June 2011.

Similar presentations


Presentation on theme: "Astronomical Video Reduction Software 1 Hristo Pavlov IOTA 2011, 17 June 2011."— Presentation transcript:

1 Astronomical Video Reduction Software 1 Hristo Pavlov IOTA 2011, 17 June 2011

2 LiMovie Pros Lunar Occultations Fresnel Diffraction Tool Lunar Grazes and Mutual Events Cons Basic tracking Blind measurements May need other software (AviSynth) Manual update 2

3 Tangra Pros Review measurements frame by frame Can open almost all videos directly Workflow. Improved tracking Range of measurement methods Pre-processing and software integration Cons No Lunar Occultations support No Mutual Events support 3

4 Tangra - Photometric Methods Papers Mighell, K., 1999, "Algorithms for CCD Stellar Photometry Stetson. P., 1986, "DAPHOT: A computer program for crowded-field stellar photometry", Naylor, T. 1998, An Optimal Extraction for Imaging Photometry Aperture Photometry PSF Photometry Numerical Analytical Optimal Extraction 4

5 5

6 6

7 7 Low Pass Filter – LP

8 8

9 9 Low Pass Difference Filter – LPD

10 Demo 10

11 Video Astrometry Accuracy ~ 0.2 pixels (~ 0.3 arcsec) Fast moving objects Measuring multiple frames Scientific value Near Earth Asteroids (NEA) Comets 11

12 Tangra Astrometry - Requirements Star catalogue – UCAC2, UCAC3 or NOMAD Calibration Take video of a known field Manually identify three stars 12

13 Astrometry of NEA 13

14 Astrometry - NEA 14

15 Astrometry - Comet 15

16 Astrometry – Comet 16

17 Questions? 17


Download ppt "Astronomical Video Reduction Software 1 Hristo Pavlov IOTA 2011, 17 June 2011."

Similar presentations


Ads by Google