ETC Request ID: STIS.sp.824684

Exposure time (seconds) = 100.0000 at wavelength 1600.00 Å

gives: SNR = 2.2401 (per resolution element)


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 0.033 6.61 2.57
    Background 0.011 2.10 1.45
        Sky 3.139e-10 6.28e-08 2.51e-04
        Dark Current 0.011 2.10 1.45
Total in selected region 0.044 8.71 2.95
Brightest Pixel (single exposure) (at 2576.00 Å) 3.109 310.86
Count rate entire detector 7,269.891
Buffer Time (sec) 275.11
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 5,679.755 567,975.455
    Background (sky+dark) 1,590.136 159,013.63
Encircled energy fraction 0.82

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength:
Grating: [G230L] R ~ 500
Aperture: 52X2


Target: [point source]
Spectrum: Kurucz Models B1V 25400 3.9
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.2 applied before normalization
Normalization: Renormalized to vegamag = 13.84 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 24.2