ETC Request ID: STIS.ta.1007781

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.8278 seconds

gives: Time to Saturation (for a single exposure) = 124.87 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 2,498.827 2,068.48 45.48
    Background 0.597 0.49 0.70
        Sky 0.435 0.36 0.60
        Dark Current 0.162 0.13 0.37
    Read Out 24.60
Total in selected region 2,499.423 2,068.98 51.71
Brightest Pixel (single exposure) 960.989 795.49
Global Count Rates
    Source only 4,997.653 4,136.964
    Background (sky+dark) 46,585.728 38,562.80
Background per unit area
    Sky Background (arcsec-2) 19.330 16.001
    Dark Current (arcsec-2) 7.200 5.960
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 0.19
Effective Wavelength 7103.48 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50LP
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Flat in units of Fν
Extinction E(B-V): None
Normalization: Flux 1.9e-14 flam at 1530.0 Å
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2