ETC Request ID: STIS.ta.1038373

Exposure time (seconds) = 1.0000

gives: SNR = 184.9506

gives: Time to Saturation (for a single exposure) = 8.01 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 34,801.699 34,801.70 186.55
    Background 0.164 0.16 0.40
        Sky 0.002 1.57e-03 0.04
        Dark Current 0.162 0.16 0.40
    Read Out 24.60
Total in selected region 34,801.863 34,801.86 188.17
Brightest Pixel (single exposure) 14,983.560 14,983.56
Global Count Rates
    Source only 69,603.398 69,603.398
    Background (sky+dark) 18,917.910 18,917.91
Background per unit area
    Sky Background (arcsec-2) 0.070 0.070
    Dark Current (arcsec-2) 7.200 7.200
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 6451.37 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: Kurucz Models O9V 33000. 4.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.7 applied before normalization
Normalization: Renormalized to vegamag = 7.22 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2