ETC Request ID: STIS.ta.1033567

Exposure time (seconds) = 0.6000

gives: SNR = 453.3362

gives: Time to Saturation (for a single exposure) = 0.98 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 433,260.601 259,956.36 509.86
    Background 18.831 11.30 3.36
        Sky 0.399 0.24 0.49
        Dark Current 18.432 11.06 3.33
    Read Out 262.40
Total in selected region 433,279.432 259,967.66 573.43
Brightest Pixel (single exposure) 122,943.137 73,765.88
Global Count Rates
    Source only 453,570.367 272,142.220
    Background (sky+dark) 18,874.767 11,324.86
Background per unit area
    Sky Background (arcsec-2) 33.243 19.946
    Dark Current (arcsec-2) 7.200 4.320
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 4.80
    Fraction of flux 0.96
    Fraction of flux in brightest pixel 0.27
Effective Wavelength 4244.43 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 0.2X0.06
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Standard HST Star Spectra G191B2B (DA0, 11.781) [100.0, 400104.0 Å]
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 25.2