ETC Request ID: STIS.sp.920226

Requested Signal/Noise Ratio = 55.000 at wavelength 2100.00 Å (per resolution element)

gives: Time = 16,337.5643 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 0.109 3,556.10 59.63
    Background 0.011 343.09 18.52
        Sky 1.857e-10 6.07e-06 2.46e-03
        Dark Current 0.011 343.09 18.52
Total in selected region 0.119 3,899.19 64.66
Brightest Pixel (single exposure) (at 2126.34 Å) 0.053 868.95
Count rate entire detector 5,840.472
Buffer Time (sec) 342.44
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 2,917.030 47,657,170.461
    Background (sky+dark) 1,572.864 25,696,766.77
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: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Flux 1.3e-12 flam at 2100.0 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