ETC Request ID: STIS.ta.1301926

Requested Signal/Noise Ratio = 40.000

gives: Time = 8.4342 seconds

gives: Time to Saturation (for a single exposure) = 1,051.80 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 247.570 2,088.06 45.70
    Background 0.225 1.90 1.38
        Sky 8.928e-06 7.53e-05 8.68e-03
        Dark Current 0.225 1.90 1.38
    Read Out 25.20
Total in selected region 247.795 2,089.96 52.20
Brightest Pixel (single exposure) 114.090 962.26
Global Count Rates
    Source only 495.141 4,176.121
    Background (sky+dark) 26,214.648 221,099.85
Background per unit area
    Sky Background (arcsec-2) 3.968e-04 0.003
    Dark Current (arcsec-2) 10.000 84.342
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 0.23
Effective Wavelength 5873.39 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND5
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models B1V 25000 4.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 6.66 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.2