ETC Request ID: STIS.ta.996078

Exposure time (seconds) = 4.0000

gives: SNR = 37.4389

gives: Time to Saturation (for a single exposure) = 462.13 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 3 x 3 pixels)
    Source 465.091 1,860.37 43.13
    Background 0.910 3.64 1.91
        Sky 0.748 2.99 1.73
        Dark Current 0.162 0.65 0.80
    Read Out 24.60
Total in selected region 466.001 1,864.01 49.69
Brightest Pixel (single exposure) 259.667 1,038.67
Global Count Rates
    Source only 895.956 3,583.823
    Background (sky+dark) 106,012.717 424,050.87
Background per unit area
    Sky Background (arcsec-2) 33.241 132.963
    Dark Current (arcsec-2) 7.200 28.800
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 0.28
Effective Wavelength 3527.47 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: 50CCD
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: User uploaded spectrum: psr_j1023.txt
Extinction E(B-V): None
Normalization: None
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 25.1.1