Las Campanas IMACS Calibrated Data Collection Overview

Data Abstract
=============
We obtained images of the (65803) Didymos system and supporting calibration 
images with the Inamori-Magellan Areal Camera and Spectrograph (IMACS) on 
the 6.5m Magellan-Baade 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 
IMACS calibrated images, which include only images with Didymos as the 
target.

Data Set Overview
=================
IMACS Raw image data (see data_lcoimacsraw collection) are calibrated in 
three 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, and (3) target images were divided by the nightly flat field.

Naming Convention
=================
IMACS 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 IMACS Raw images but prepend 'r' to the 
camera reference, as follows:

rift<counter>c<CCD#>_<yymmdd>.<ext>

where:
r refers to reduced (calibrated) data

ift is the camera reference, referring to the IMACS f/2 camera

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

c<CCD#>	is the CCD number (1-8) within the mosaic array for the IMACS focal 
plane. For this dataset, only CCD 2 was used so it is always 2.

<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. rift1001c2_220702.fits is a calibrated image product for a 2022-07-02 
observing session. It is the 1001st image generated on that UT date.