ETC Request ID: STIS.ta.1364540

Requested Signal/Noise Ratio = 40.000

gives: Time = 2.8474 seconds

gives: Time to Saturation (for a single exposure) = 289.30 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 733.060 2,087.30 45.69
    Background 0.235 0.67 0.82
        Sky 0.001 3.00e-03 0.05
        Dark Current 0.234 0.67 0.82
    Read Out 25.20
Total in selected region 733.296 2,087.97 52.18
Brightest Pixel (single exposure) 414.788 1,181.06
Global Count Rates
    Source only 1,466.121 4,174.595
    Background (sky+dark) 27,330.034 77,818.84
Background per unit area
    Sky Background (arcsec-2) 0.047 0.133
    Dark Current (arcsec-2) 10.400 29.613
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 0.28
Effective Wavelength 3744.34 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OII
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models F5I 7000 1.5
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.372 applied before normalization
Normalization: Flux 6.2e-14 flam at 3729.0 Å
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2