1 / 5

CCD Photometry: Planning

CCD Photometry: Planning. Planner/events: magnitude, depth, air mass, twilight Weather: check the web; what can you work through? Twilight considerations: darkness and flats; ephemeris. Where is the Moon? Plan for data storage/archiving Choose filters (for first project, just the V).

aquene
Download Presentation

CCD Photometry: Planning

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. CCD Photometry: Planning Planner/events: magnitude, depth, air mass, twilight Weather: check the web; what can you work through? Twilight considerations: darkness and flats; ephemeris. Where is the Moon? Plan for data storage/archiving Choose filters (for first project, just the V)

  2. Finder charts • Finder charts: comparison stars, offsets, duplicity of markings (GCVS); companions, orientation.

  3. Setting up • Get there early! • Astronomical twilight: sun at –18O alt. • Set clock/watch to one-sec accuracy -not precision [9-1-202-762-1401 or on Internet, soon]

  4. Acquiring Sky Flats Why? [Mira samples] , instrument undisturbed Good field [finding] clear? Chase twilight until not saturated (<65535) Odd number. Got stars? [dither] darks [same/long], bias

  5. Data Images take enough images of ingress and egress name as hhmmss (example 022341) = UT Dark every 15-20 minutes; two at start and end (same duration as data exposures) Keep field registered (drift=problems later) Keep a data log using forms provided

More Related