ETC Request ID: STIS.ta.1368416

Requested Signal/Noise Ratio = 40.000

gives: Time = 1.6474 seconds

gives: Time to Saturation (for a single exposure) = 227.56 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 1,266.905 2,087.12 45.69
    Background 0.236 0.39 0.62
        Sky 0.002 2.57e-03 0.05
        Dark Current 0.234 0.39 0.62
    Read Out 25.20
Total in selected region 1,267.140 2,087.51 52.18
Brightest Pixel (single exposure) 527.333 868.74
Global Count Rates
    Source only 2,533.809 4,174.245
    Background (sky+dark) 27,306.262 44,984.85
Background per unit area
    Sky Background (arcsec-2) 0.069 0.114
    Dark Current (arcsec-2) 10.400 17.133
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 0.21
Effective Wavelength 6663.66 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND3
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Black body at 6250.0K
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.01 applied before normalization
Normalization: Renormalized to vegamag = 10.83 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2