ETC Request ID: STIS.sp.794658

Requested Signal/Noise Ratio = 55.000 at wavelength 2000.00 Å (per resolution element)

gives: Time = 58,730.3094 seconds


Table of Source and Noise Counts per Pixel

Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (box 7 pixels high) (1 pix x pix) (2.0 pix resel x pix)
    Source 0.036 4,180.60 64.66
    Background 0.011 1,233.34 35.12
        Sky 4.727e-11 5.55e-06 2.36e-03
        Dark Current 0.011 1,233.34 35.12
Total in selected region 0.046 5,413.94 76.01
Brightest Pixel (single exposure) (at 2115.00 Å) 0.038 2,232.22
Count rate entire detector 3,732.344
Buffer Time (sec) 535.86
For APT purposes, the recommended buffer time should be 4/5 of the buffer time calculated above. Please refer to the STIS Instrument Handbook for more details.
Global Count Rates
    Source only 1,476.068 86,689,913.089
    Background (sky+dark) 1,572.864 92,374,789.48
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength: 2013
Grating: [E230H] R ~ 114000
Aperture: 0.2X0.09


Target: [point source]
Spectrum: Castelli-Kurucz Models F2V 7000 4.0
Extinction E(B-V): None
Normalization: Flux 5e-13 flam at 2000.0 Å
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 24.1