ETC Request ID: STIS.sp.916302

Requested Signal/Noise Ratio = 60.000 at wavelength 1850.00 Å (per resolution element)

gives: Time = 46,509.5255 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 0.051 4,730.38 68.78
    Background 0.011 976.70 31.25
        Sky 1.121e-11 1.04e-06 1.02e-03
        Dark Current 0.011 976.70 31.25
Total in selected region 0.061 5,707.08 78.84
Brightest Pixel (single exposure) (at 1882.91 Å) 0.023 1,092.45
Count rate entire detector 3,525.755
Buffer Time (sec) 567.25
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 1,245.468 57,926,143.168
    Background (sky+dark) 1,572.864 73,153,158.36
Encircled energy fraction 0.92

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength: 1763
Grating: [E230H] R ~ 114000
Aperture: 0.2X0.09


Target: [point source]
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Flux 1.3e-12 flam at 5500.0 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 25.1.1