ETC Request ID: STIS.ta.1366544

Requested Signal/Noise Ratio = 40.000

gives: Time = 209.5172 seconds

gives: Time to Saturation (for a single exposure) = 97,931.59 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 10.362 2,170.94 46.59
    Background 0.666 139.64 11.82
        Sky 0.432 90.61 9.52
        Dark Current 0.234 49.03 7.00
    Read Out 25.20
Total in selected region 11.028 2,310.58 54.27
Brightest Pixel (single exposure) 1.225 256.73
Global Count Rates
    Source only 57.870 12,124.827
    Background (sky+dark) 54,817.750 11,485,260.58
Background per unit area
    Sky Background (arcsec-2) 19.221 4,027.064
    Dark Current (arcsec-2) 10.400 2,178.979
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 = 19.48 in filter Sloan/G
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2