"NORMS_" output files from denoising

Dear CONN experts,

This may be a basic question, but I'm posting it here since I haven't been able to find any answer from the previous relevant posts (e.g., [url=message.php?msg_id=18633]here[/url] or [url=message.php?msg_id=16457]here[/url]). Following the denoising step, I am seeing files with the "NORMS_" prefix in my conn_*\results\preprocessing folder (I'm using v.17f), as follows:

niftiNORMS_Subject*_Session001.nii
NORMS_Subject*_Condition001.mat
NORMS_Subject*_Session001.mat

Could anyone please let me know what these files might represent? Many thanks in advance.

Best,
Yuta