ETC Request ID: STIS.sp.826191

Exposure time (seconds) = 2,000.0000 at wavelength 2825.00 Å

gives: SNR = 22.7807 (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 0.142 567.70 23.83
    Background 0.011 42.00 6.48
        Sky 5.224e-08 2.09e-04 0.01
        Dark Current 0.011 42.00 6.48
Total in selected region 0.152 609.70 24.92
Brightest Pixel (single exposure) (at 2911.51 Å) 0.071 142.34
Count rate entire detector 3,262.653
Buffer Time (sec) 613.00
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 1,373.809 2,747,618.501
    Background (sky+dark) 1,572.868 3,145,735.13
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength: 2707
Grating: [E230M] R ~ 30000
Aperture: 0.2X0.2


Target: [point source]
Spectrum: Castelli-Kurucz Models F5V 6500 4.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 10.5 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