ETC Request ID: STIS.sp.1297603

Requested Signal/Noise Ratio = 10.000 at wavelength 3085.00 Å (per resolution element)

gives: Time = 283.2973 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 0.190 107.39 10.36
    Background 0.014 7.94 2.82
        Sky 6.484e-06 3.67e-03 0.06
        Dark Current 0.014 7.93 2.82
Total in selected region 0.204 115.33 10.74
Brightest Pixel (single exposure) (at 2601.60 Å) 0.195 55.21
Count rate entire detector 2,445.826
Buffer Time (sec) 817.72
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 344.372 97,559.590
    Background (sky+dark) 2,101.454 595,336.23
Encircled energy fraction 0.87

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength:
Grating: [G230L] R ~ 500
Aperture: 52X0.5


Target: [point source]
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 15.0 in filter Johnson/V
Redshift: None
Emission Lines:
Line at Center 3090.0 Å    FWHM 15.0 Å   Flux 7e-16 Fλ


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 26.2