ETC Request ID: STIS.ta.994765

Requested Signal/Noise Ratio = 40.000

gives: Time = 5.0770 seconds

gives: Time to Saturation (for a single exposure) = 581.50 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 407.468 2,068.69 45.48
    Background 0.164 0.83 0.91
        Sky 0.002 7.95e-03 0.09
        Dark Current 0.162 0.82 0.91
    Read Out 24.60
Total in selected region 407.631 2,069.52 51.72
Brightest Pixel (single exposure) 206.364 1,047.70
Global Count Rates
    Source only 814.936 4,137.388
    Background (sky+dark) 18,917.877 96,045.14
Background per unit area
    Sky Background (arcsec-2) 0.070 0.353
    Dark Current (arcsec-2) 7.200 36.554
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 0.25
Effective Wavelength 4998.34 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 B0V 30000 4.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 12.14 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.1.1