ETC Request ID: STIS.ta.1366548

Requested Signal/Noise Ratio = 40.000

gives: Time = 154.4836 seconds

gives: Time to Saturation (for a single exposure) = 74,075.53 seconds


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Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 13.913 2,149.37 46.36
    Background 0.666 102.96 10.15
        Sky 0.432 66.81 8.17
        Dark Current 0.234 36.15 6.01
    Read Out 25.20
Total in selected region 14.580 2,252.33 53.73
Brightest Pixel (single exposure) 1.620 250.26
Global Count Rates
    Source only 77.706 12,004.341
    Background (sky+dark) 54,817.750 8,468,444.62
Background per unit area
    Sky Background (arcsec-2) 19.221 2,969.281
    Dark Current (arcsec-2) 10.400 1,606.630
Extraction region
box of 3 x 3 pixels
    Effective Sky Area (pixels) 9.00
Effective Wavelength 7520.16 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50LP
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [extended source]
Source diameter (arcsec): 0.4
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Renormalized to abmag = 19.16 in filter Sloan/G
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2