ETC Request ID: STIS.im.1162799

Requested Signal/Noise Ratio = 5.000

gives: Time = 2,826.3958 seconds

gives: Time to Saturation (for a single exposure) = 186,663.65 seconds

gives: Optimum SNR = 8.4226



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Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (circle with radius 0.212 arcsec)
    Source 0.251 708.84 26.62
    Background 6.110 17,268.09 131.41
        Sky 4.685 13,240.48 115.07
        Dark Current 1.425 4,027.61 63.46
    Read Out 46.05
Total in selected region 6.360 17,976.93 141.77
Brightest Pixel (single exposure) 0.177 499.67

Global Count Rates
    Source only 0.313 886.044
    Background (sky+dark) 113,214.349 319,988,558.13

Background per unit area
    Sky Background (arcsec-2) 33.188 93,801.990
    Dark Current (arcsec-2) 10.000 28,263.958

Extraction region
circle with radius 0.212 arcsec
    Area (pixels) 56.46
    Fraction of flux 0.80
    Fraction of flux in brightest pixel 0.22
Effective Wavelength 6288.46 Å


Instrument name: STIS
Mode: imaging
Detector: CCD
Aperture: 50CCD
Gain: 1.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Kurucz Models G2V 5860 4.4
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 27.3 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Earth Shine: Average
    Zodiacal Light: Average
    Air Glow: Average


Plots

These results were computed using: ETC version 26.1