NSClean: An Algorithm for Removing Correlated Noise from JWST NIRSpec Images

Understand

NSClean is an algorithm and associated python package for removing faint vertical banding and ``picture frame noise'' from JWST Near Infrared Spectrograph (NIRSpec) images.

• NSClean uses known dark areas to fit a background model to each exposure in Fourier space.
• When the model is subtracted, it removes nearly all correlated noise.
• Compared to simpler strategies like subtracting the rolling median, NSClean is more thorough and uniform.