We are excited to announce the launch of our new forums! You can access it forums.aavso.org. For questions, please see our blog post. The forums at aavso.org/forum have become read-only.
Announcement: New Applications
We are excited to announce the launch of our new applications! We're opening up early access to our new applications for searching, downloading, and submitting photometric observations. You can now access these applications through these links:
We ask for your feedback in order to help us improve these applications. Please send feedback for the applications above to feedback@aavso.org. Note: please avoid duplicating submissions across the two submit applications.
A "flat dark" is a dark frame that has the same exposure time and temperature as the flat-field image. Often flats are taken at much shorter exposure times than your science frames, and so you might use special dark frames for subtraction. A regular "dark frame" just matches the science frame - it may be a stack of darks with the same exposure time, or it may be a longer exposure stack that is scaled to match the exposure time of the science images.
A "flat dark" is a dark frame that has the same exposure time and temperature as the flat-field image. Often flats are taken at much shorter exposure times than your science frames, and so you might use special dark frames for subtraction. A regular "dark frame" just matches the science frame - it may be a stack of darks with the same exposure time, or it may be a longer exposure stack that is scaled to match the exposure time of the science images.
Arne