ETC Request ID: STIS.ta.1010273

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.1380 seconds

gives: Time to Saturation (for a single exposure) = 18.06 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 14,989.023 2,068.18 45.48
    Background 0.164 0.02 0.15
        Sky 0.002 2.16e-04 0.01
        Dark Current 0.162 0.02 0.15
    Read Out 24.60
Total in selected region 14,989.187 2,068.21 51.70
Brightest Pixel (single exposure) 6,643.563 916.68
Global Count Rates
    Source only 29,978.047 4,136.369
    Background (sky+dark) 18,917.910 2,610.29
Background per unit area
    Sky Background (arcsec-2) 0.070 0.010
    Dark Current (arcsec-2) 7.200 0.993
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 6208.53 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: Castelli-Kurucz Models B5V 15000 4.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.35 applied before normalization
Normalization: Renormalized to vegamag = 8.04 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2