ETC Request ID: STIS.sp.1392949

Requested Signal/Noise Ratio = 10.000 at wavelength 2850.00 Å (per resolution element)

gives: Time = 239.2090 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 0.222 106.30 10.31
    Background 0.014 6.70 2.59
        Sky 1.867e-06 8.93e-04 0.03
        Dark Current 0.014 6.70 2.59
Total in selected region 0.236 113.00 10.63
Brightest Pixel (single exposure) (at 2972.80 Å) 0.104 24.81
Count rate entire detector 2,190.152
Buffer Time (sec) 913.18
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 91.282 21,835.417
    Background (sky+dark) 2,098.870 502,068.57
Encircled energy fraction 0.87

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength:
Grating: [G230L] R ~ 500
Aperture: 52X0.2


Target: [point source]
Spectrum: Black body at 3333.0K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 11.22 in filter Johnson/V
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 27.2