ETC Request ID: STIS.ta.820963

Exposure time (seconds) = 1.0000

gives: SNR = 386.4186

gives: Time to Saturation (for a single exposure) = 2.26 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 149,967.383 149,967.38 387.26
    Background 0.608 0.61 0.78
        Sky 0.437 0.44 0.66
        Dark Current 0.171 0.17 0.41
    Read Out 25.50
Total in selected region 149,967.991 149,967.99 388.10
Brightest Pixel (single exposure) 52,987.555 52,987.55
Global Count Rates
    Source only 299,934.766 299,934.766
    Background (sky+dark) 47,758.524 47,758.52
Background per unit area
    Sky Background (arcsec-2) 19.417 19.417
    Dark Current (arcsec-2) 7.600 7.600
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 0.18
Effective Wavelength 7536.13 Å

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


Target: [point source]
Spectrum: Castelli-Kurucz Models K7V 4000 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 12.4 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2