File indexing completed on 2024-04-14 14:10:42

 /*
     SPDX-FileCopyrightText: 2004 Jasem Mutlaq
     SPDX-FileCopyrightText: 2020 Eric Dejouhanet <eric.dejouhanet@gmail.com>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 
     Some code fragments were adapted from Peter Kirchgessner's FITS plugin
     SPDX-FileCopyrightText: Peter Kirchgessner <http://members.aol.com/pkirchg>
 */
 
 #pragma once
 
 class SkyBackground
 {
     public:
         // Must call initialize() if using the default constructor;
         SkyBackground() {}
         SkyBackground(double m, double sig, double np);
         virtual ~SkyBackground() = default;
 
         // Mean of the background level (ADUs).
         double mean {0};
         // Standard deviation of the background level.
         double sigma {0};
         // Number of pixels used to estimate the background level.
         int numPixelsInSkyEstimate {0};
 
         // Number of stars detected in the sky. A relative measure of sky quality
         // (compared with the same part of the sky at a different time).
         int starsDetected {0};
 
         // Given a source with flux spread over numPixels, and a CCD with gain = ADU/#electron)
         // returns an SNR estimate.
         double SNR(double flux, double numPixels, double gain = 0.5) const;
         void initialize(double mean_, double sigma_, double numPixelsInSkyEstimate_, int numStars_ = 0);
         void setStarsDetected(int numStars)
         {
             starsDetected = numStars;
         }
 
     private:
         double varSky = 0;
 };