ETC Request ID: STIS.ta.904754

Requested Signal/Noise Ratio = 40.000

gives: Time = 1.4785 seconds

gives: Time to Saturation (for a single exposure) = 289.68 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 1,399.225 2,068.73 45.48
    Background 0.598 0.88 0.94
        Sky 0.436 0.64 0.80
        Dark Current 0.162 0.24 0.49
    Read Out 24.60
Total in selected region 1,399.823 2,069.61 51.72
Brightest Pixel (single exposure) 414.251 612.46
Global Count Rates
    Source only 2,798.451 4,137.455
    Background (sky+dark) 46,640.529 68,957.13
Background per unit area
    Sky Background (arcsec-2) 19.368 28.635
    Dark Current (arcsec-2) 7.200 10.645
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 0.15
Effective Wavelength 8310.68 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50LP
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Pickles Models M5V 2951.21K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 18.8 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.1.1