ETC Request ID: STIS.sp.1009821

Requested Signal/Noise Ratio = 5.000 at wavelength 2850.00 Å (per resolution element)

gives: Time = 7,634.3065 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 0.005 77.04 8.78
    Background 0.011 160.35 12.66
        Sky 1.875e-06 0.03 0.17
        Dark Current 0.011 160.32 12.66
Total in selected region 0.016 237.39 15.41
Brightest Pixel (single exposure) (at 2796.80 Å) 0.054 410.83
Count rate entire detector 1,577.263
Buffer Time (sec) 1,268.02
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 2.656 20,279.713
    Background (sky+dark) 1,574.606 12,021,028.07
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 3050.0K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 14.59 in filter Johnson/V
Redshift: None
Emission Lines:
Line at Center 2797.2 Å    FWHM 1.73 Å   Flux 4.2e-15 Fλ
Line at Center 2804.0 Å    FWHM 1.73 Å   Flux 2.8e-15 Fλ


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 25.2