ETC Request ID: STIS.ta.1034914

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.6574 seconds

gives: Time to Saturation (for a single exposure) = 96.21 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 3,146.558 2,068.42 45.48
    Background 0.597 0.39 0.63
        Sky 0.435 0.29 0.53
        Dark Current 0.162 0.11 0.33
    Read Out 24.60
Total in selected region 3,147.154 2,068.81 51.71
Brightest Pixel (single exposure) 1,247.310 819.93
Global Count Rates
    Source only 6,293.115 4,136.836
    Background (sky+dark) 46,585.728 30,623.55
Background per unit area
    Sky Background (arcsec-2) 19.330 12.707
    Dark Current (arcsec-2) 7.200 4.733
Extraction region
box of 3 x 3 pixels
    Effective Sky Area (pixels) 9.00
    Fraction of flux 0.50
    Fraction of flux in brightest pixel 0.20
Effective Wavelength 6939.12 Å

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


Target: [point source]
Spectrum: User uploaded spectrum: GD492-8900-550.dk
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 15.5 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 25.2