ETC Request ID: STIS.ta.198019

Exposure time (seconds) = 0.5000

gives: SNR = 165.9241

gives: Time to Saturation (for a single exposure) = 4.75 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 116,865.107 58,432.55 241.73
    Background 102.395 51.20 7.16
        Sky 85.909 42.95 6.55
        Dark Current 16.486 8.24 2.87
    Read Out 256.00
Total in selected region 116,967.502 58,483.75 352.16
Brightest Pixel (single exposure) 30,346.193 15,173.10
Global Count Rates
    Source only 123,418.023 61,709.012
    Background (sky+dark) 86,683.029 43,341.51
Background per unit area
    Sky Background (arcsec-2) 33.558 16.779
    Dark Current (arcsec-2) 6.440 3.220
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 1,024.00
    Fraction of flux 0.95
    Fraction of flux in brightest pixel 0.25
Effective Wavelength 5279.55 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 52X0.1
Gain: 4.0
# Frames: 1
Binning:
Dark:


Target: [point source]
Spectrum: Castelli-Kurucz Models O3V 45000 4.5
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.4 applied before normalization
Normalization: Renormalized to Johnson V = 13.09 in magnitudes relative to Vega
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 19.2