Keck Observatory Archive (KOA) Tips

Simple Jupyter notebook template for fetching images/data from KOA (modify the arguments for your own usage).

For fetching engineering star images/data (i.e. ‘engcalib’ images), look for keyword ‘ao_confirmation’. Depending on how you are fetching the data (using the notebook above or the KOA online GUI), you will be returned a table of query results prior to downloading selected images + metadata. Look for the keyword ‘ao_confirmation’ for engineering star files (these should also include a COMMENT keyword in the FITS header with the entry ‘LGSAO Checkout’).