ETC Request ID: STIS.ta.1005781

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.8668 seconds

gives: Time to Saturation (for a single exposure) = 112.53 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 2,386.123 2,068.26 45.48
    Background 0.164 0.14 0.38
        Sky 0.002 1.36e-03 0.04
        Dark Current 0.162 0.14 0.37
    Read Out 24.60
Total in selected region 2,386.287 2,068.40 51.71
Brightest Pixel (single exposure) 1,066.383 924.33
Global Count Rates
    Source only 4,772.247 4,136.520
    Background (sky+dark) 18,917.910 16,397.79
Background per unit area
    Sky Background (arcsec-2) 0.070 0.060
    Dark Current (arcsec-2) 7.200 6.241
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 0.22
Effective Wavelength 6138.18 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: Bruzual Synthetic Stellar Spectra B2 V
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.46 applied before normalization
Normalization: Renormalized to vegamag = 10.08 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2