The HeVICS images adhere to the following filename convention:

HeViCS_PDR1_[field]_[band].fits

"field" is V1, V2, V3, or V4. The field number increases from north to south.

"band" refers to the central wavelength of the bandpass of the observation.

Single-extension images have a suffix "img", "err", or "cov" indicating 
the science image, uncertainty image, and coverage image respectively.