ETC Request ID: STIS.sp.827853

Requested Signal/Noise Ratio = 25.000 at wavelength 2025.00 Å (per resolution element)

gives: Time = 4,419.8535 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 0.085 754.97 27.48
    Background 0.011 92.82 9.63
        Sky 6.711e-11 5.93e-07 7.70e-04
        Dark Current 0.011 92.82 9.63
Total in selected region 0.096 847.79 30.20
Brightest Pixel (single exposure) (at 2080.36 Å) 0.039 174.56
Count rate entire detector 5,359.877
Buffer Time (sec) 373.14
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 2,551.896 11,279,007.593
    Background (sky+dark) 1,572.864 6,951,828.48
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength: 1963
Grating: [E230H] R ~ 114000
Aperture: 0.2X0.09


Target: [point source]
Spectrum: Bruzual Synthetic Stellar Spectra O7 V
Extinction E(B-V): None
Normalization: Flux 1.2e-12 flam at 2025.0 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 24.2