Spectrum-RG / ART-XC
ART-XC Count Predictor
Estimate the expected number of source counts in the 4–12 keV band assuming a Crab-like spectrum.
Source and exposure
Results
Expected source counts
250
Source count rate
0.025 counts/s
Exposure required for target counts
40 ks
These are expected mean values for Poisson statistics, not guaranteed detected counts. Background is not included.
Expected source counts versus exposure time
Calibration and assumptions
Provisional ARTSS1–5 conversion factor: 1 count/s corresponds to a 4–12 keV energy flux of 4.0 × 10⁻¹¹ erg cm⁻² s⁻¹.
For the 4–12 keV energy flux F and effective exposure T in seconds, the expected source counts are N = (F / 4.0 × 10⁻¹¹) × T, where F is expressed in erg cm⁻² s⁻¹.