1 / 11

Commissioning Update: SAC Waives Pipeline Requirement for Instrument and Data Processing

On September 5, 2012, the SAC approved the commissioning of the instrument, bypassing the original pipeline requirement. Wendy's waiving allows the SAC to officially forward this recommendation to the Council, which is expected to declare the instrument commissioned. Two data pipelines currently exist: Dan's automated system, ideal for final data products and operational at the telescope, and Andy Monson’s hands-on version, which can be run elsewhere with assistance. Results include a flat background in images and detailed diagnostics on various parameters.

lynna
Télécharger la présentation

Commissioning Update: SAC Waives Pipeline Requirement for Instrument and Data Processing

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. FourStar Commissioning

  2. Events 1. Sept 5, 2012 telecon – SAC signed off on the instrument itself. 2. Wendy has since OK’d waiver of original requirement of a pipeline, i.e., Dan’s. 3. Now we ask that the SAC officially waive the requirement and pass this recommendation along to the Council. 4. The Council then (hopefully) declares it commissioned.

  3. Meanwhile … Two pipelines now “exist”: 1. Dan’s – good for final or near-final data products, at the telescope; runs automatically as the data flow in. Probably not too easy to get working at a home institution, but this remains to be seen. Written in Python. 2. Andy Monson’s – hands-on, can be run at the telescope, but not automated as Dan’s is. Somewhat more general, and can be run elsewhere with a little help from Andy. Written in shell scripts calling IRAF routines.

  4. Typical result of Dan’s Some parameters: 1% filter at 1.18 microns 7 hour exposure 105 x 240 sec individual frames 2.5 pixels FWHM on final stacked image Depth is as advertised in online manual Note chip seams: gone; note increased noise Wavelet transform method for sky creation; yields very flat background

  5. Cosmos field

  6. Pipeline diagnostics page: shifts, phot offsets, # of stars, FWHM

  7. Thumbnails: current stack, coverage map, noise map

  8. Thumbnails: sky-subtracted frames

  9. 47 Tuc example of wavelet method for sky 1. 2 minutes at Ks total 2. 3.5 pix FWHM 3. Main thing to notice is how flat sky is even in the presence of an extreme background gradient.

More Related