ETC Request ID: STIS.sp.1366578

Requested Signal/Noise Ratio = 0.200 at wavelength 2602.00 Å (per resolution element)

gives: Time = 5,998.5095 seconds


Table of Source and Noise Counts per Pixel

Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (box 2 pixels high) (1 pix x 2 pix) (2 pix resel x 2 pix)
    Source 1.172e-04 1.41 1.19
    Background 0.004 48.00 6.93
        Sky 9.315e-07 0.01 0.11
        Dark Current 0.004 47.99 6.93
Total in selected region 0.004 49.41 7.03
Brightest Pixel (single exposure) (at 2484.80 Å) 0.002 13.41
Count rate entire detector 2,101.912
Buffer Time (sec) 951.51
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 0.465 2,788.210
    Background (sky+dark) 2,101.447 12,605,548.91

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


Target: [extended source]
Source diameter (arcsec): 0.4
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Flux 3.5e-17 flam at 2602.0 Å
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