ETC Request ID: STIS.im.204049

Exposure time (seconds) = 90.0000

gives: SNR = 604.4173

gives: Time to Saturation (for a single exposure) = 98.67 seconds

gives: Optimum SNR = 679.6013


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Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (circle with radius 0.194 arcsec)
    Source 4,126.124 371,351.17 609.39
    Background 0.768 69.12 8.31
        Sky 0.006 0.51 0.71
        Dark Current 0.762 68.62 8.28
    Read Out 77.85
Total in selected region 4,126.892 371,420.29 614.40
Brightest Pixel (single exposure) 1,459.412 65,673.53
Global Count Rates
    Source only 5,157.655 464,188.965
    Background (sky+dark) 17,006.340 1,530,570.60
Background per unit area
    Sky Background (arcsec-2) 0.047 4.266
    Dark Current (arcsec-2) 6.440 579.600
Extraction region
circle with radius 0.194 arcsec
    Effective Sky Area (pixels) 47.35
    Fraction of flux 0.80
    Fraction of flux in brightest pixel 0.28
Effective Wavelength 3737.70 Å

Instrument name: STIS
Mode: imaging
Detector: CCD
Aperture: F28X50OII
Gain: 4.0
# Frames: 2
Binning:
Dark:


Target: [point source]
Spectrum: Standard HST Star Spectra AGK+81°266 (sdO, 11.94)
Extinction E(B-V): None
Normalization: None
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 19.2