ETC Request ID: COS.sp.642298
Requested Signal/Noise Ratio = 10.000 at wavelength 1310.00 Å (per resolution element)
gives: Time = 214.2270 seconds
Table of Source and Noise Counts per Pixel
Detailed Information | Count rate | Total counts | Associated noise |
(counts/s) | (counts) | (counts) | |
Counts (box 35 pixels high) | (1 pix x pix) | (6 pix resel x pix) | |
Source | 0.078 | 100.18 | 10.01 |
Background | 1.435e-04 | 0.18 | 0.43 |
Sky | 4.865e-12 | 6.25e-09 | 7.91e-05 |
Dark Current | 1.435e-04 | 0.18 | 0.43 |
Total in selected region | 0.078 | 100.37 | 10.02 |
Brightest Pixel (single exposure) (at 1216.20 Å) | 0.118 | 25.30 | |
Brightest Pixel in Segment A (at 1355.46 Å) | 0.010 | ||
Brightest Pixel in Segment B (at 1216.20 Å) | 0.118 | ||
Count rate entire detector | 2,550.438 | ||
Count rate Segment A | 1,029.835 | ||
Count rate Segment B | 1,520.603 | ||
Buffer Fill Time (sec) | 924 | ||
For APT purposes, the recommended buffer time is 2/3 of the buffer fill time calculated above. Please refer to Chapter 5.4 in the COS Instrument Handbook for more details. |
Encircled energy fraction | 1.00 | ||
Instrument name: | COS |
Mode: | spectroscopic |
Detector: | FUV |
Central Wavelength: | 1309 |
Grating: | [G130M] Grating (R ~ 20,000 - 24,000) |
Aperture: | Primary Science Aperture |
Target: [point source] | |
Spectrum: | Flat in units of Fλ |
Extinction E(B-V): | None |
Normalization: | Flux 6.25e-14 flam at 1310.0 Å |
Redshift: | None |
Emission Lines: | None |
Selected background: | |
Sky Background: | |
Earth Shine: | Average |
Zodiacal Light: | Average |
Air Glow: | Average |
Table of Source and Noise Counts per Pixel
These results were computed using: ETC version 22.2