ETC Request ID: STIS.ta.1012237

Requested Signal/Noise Ratio = 40.000

gives: Time = 20.1453 seconds

gives: Time to Saturation (for a single exposure) = 3,165.80 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 103.038 2,075.73 45.56
    Background 0.597 12.03 3.47
        Sky 0.435 8.76 2.96
        Dark Current 0.162 3.26 1.81
    Read Out 24.60
Total in selected region 103.635 2,087.76 51.89
Brightest Pixel (single exposure) 37.905 763.61
Global Count Rates
    Source only 206.076 4,151.467
    Background (sky+dark) 46,585.728 938,482.33
Background per unit area
    Sky Background (arcsec-2) 19.330 389.406
    Dark Current (arcsec-2) 7.200 145.046
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 7344.02 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: Kurucz Models K4V 4560 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 20.0 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2