Stitched Target Pixel Stamps From K2 ("K2SUPERSTAMP")

The K2SUPERSTAMP project consists of image data on four open clusters observed by the NASA K2 Mission. The clusters are M35, M67, Ruprecht 147, and NGC 6530 -- the Lagoon Nebula Cluster (referred to here as the Lagoon). While data for these regions were previously released by K2, it consisted of small (~50x50) target pixel file stamps. In this release, the K2SUPERSTAMP team have stitched together all small stamps for each region to create one larger image for every epoch, and subsequently fit a world coordinate system (WCS) solution to each resulting FITS file. With these products it is now possible to identify any and all stars in these open cluster regions via their right ascension and declination. Most stars that fell across the edge of the target pixel files now have spatially continous data. Each file corresponds to a single timestamp at the 30 minute long cadence of K2, and may be read in via standard FITS handling programs (e.g. IRAF and Python/astropy). This format enables the production of time series photometry for cluster stars.