ETC Request ID: STIS.ta.640577

Exposure time (seconds) = 0.1000

gives: SNR = 120.8777

gives: Time to Saturation (for a single exposure) = 2.12 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 151,663.533 15,166.35 123.15
    Background 0.153 0.02 0.12
        Sky 9.028e-06 9.03e-07 9.50e-04
        Dark Current 0.153 0.02 0.12
    Read Out 24.00
Total in selected region 151,663.686 15,166.37 125.47
Brightest Pixel (single exposure) 56,662.420 5,666.24
Global Count Rates
    Source only 303,327.066 30,332.707
    Background (sky+dark) 17,826.043 1,782.60
Background per unit area
    Sky Background (arcsec-2) 4.012e-04 4.012e-05
    Dark Current (arcsec-2) 6.800 0.680
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 0.19
Effective Wavelength 7255.47 Å

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


Target: [point source]
Spectrum: Castelli-Kurucz Models G2V 5750 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 0.01 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 22.2