ETC Request ID: STIS.ta.1007455

Exposure time (seconds) = 0.2000

gives: SNR = 236.4578

gives: Time to Saturation (for a single exposure) = 1.33 seconds

Exposure time calculation HAD WARNINGS.

WARNING MESSAGE: Partial overlap between instrument throughput band and target spectrum. Please doublecheck the wavelength range covered by the selected spectrum, and the instrument documentation for the selected filter.


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Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 480,059.516 96,011.90 309.86
    Background 23.751 4.75 2.18
        Sky 5.319 1.06 1.03
        Dark Current 18.432 3.69 1.92
    Read Out 262.40
Total in selected region 480,083.267 96,016.65 406.04
Brightest Pixel (single exposure) 89,901.427 17,980.29
Global Count Rates
    Source only 539,109.602 107,821.920
    Background (sky+dark) 19,044.573 3,808.91
Background per unit area
    Sky Background (arcsec-2) 33.243 6.649
    Dark Current (arcsec-2) 7.200 1.440
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 64.00
    Fraction of flux 0.89
    Fraction of flux in brightest pixel 0.17
Effective Wavelength 7803.81 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 52X0.1
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: User uploaded spectrum: gj1132.dat
Extinction E(B-V): None
Normalization: None
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2