ETC Request ID: STIS.sp.1011551

Requested Signal/Noise Ratio = 30.000 at wavelength 1216.00 Å (per resolution element)

gives: Time = 3,881.5245 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 7 pix) (2 pix resel x 7 pix)
    Source 0.167 1,297.26 36.02
    Background 0.001 8.15 2.86
        Sky 8.103e-14 6.29e-10 2.51e-05
        Dark Current 0.001 8.15 2.86
Total in selected region 0.168 1,305.41 43.24
Brightest Pixel (single exposure) (at 1216.33 Å) 0.109 424.27
Count rate entire detector 191.104
Buffer Time (sec) 10,465.53
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 20.292 78,764.632
    Background (sky+dark) 157.419 611,023.79
Encircled energy fraction 0.88

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1425
Grating: [E140M] R ~ 45800
Aperture: 0.2X0.2
Glow region: low


Target: [point source]
Spectrum: Kurucz Models G8V 5570 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 6.578 in filter Johnson/V
Redshift: None
Emission Lines:
Line at Center 1216.35 Å    FWHM 0.7 Å   Flux 4.27e-12 Fλ


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 25.2