Las Campanas Swope Calibrated Data Collection Overview

Data Abstract
=============
We obtained images of the (65803) Didymos system and supporting calibration 
images with the Swope 4K CCD on the Swope 1m Telescope at the Las Campanas 
Observatory (LCO). These images were taken in order to determine the orbit 
period of Dimorphos, the satellite of Didymos. This collection consists of 
the Las Campanas Swope calibrated images, which include only images with 
Didymos as the target.

Data Set Overview
=================
Swope Raw image data (see data_lcoswoperaw collection) are calibrated in 
four steps: (1) bias was removed from flat field and target images by 
subtracting their respective overscan regions, (2) bias-subtracted flat 
field images were normalized and median combined to create a nightly flat 
field, (3) target images were divided by the nightly flat field, and (4) 
the results from each of the four separate readout amplifiers are combined 
into a single product.

Naming Convention
=================
Swope Calibrated images consist of a single fits file containing the  
calibrated image and an associated XML file. They are named according to 
the same naming convention as Swope Raw images but prepend 'r' to the 
camera reference and drop the readout amplifier number, as follows:

rccd<counter>_<yymmdd>.<ext>

where:
r refers to reduced (calibrated) data

ccd is the camera reference, referring to the Swope 4K CCD

<counter> is a four-digit image counter for observing session starting 
at 0001, reset for each night of observation

<yymmdd> is the UTC year, month, day of observation

<ext> is the file extension. “.fits” for FITS file format, ".xml" for the 
PDS4 XML label

Ex. rccd1001_220822.fits is a calibrated image product for a 2022-08-22 
observing session. It was generated from the 1001st image set generated 
that night from raw images ccd1001_a1_220822,fits, ccd1001_a2_220822.fits, 
ccd1001_a3_220822.fits, and ccd1001_a4_220822.fits.