ETC Request ID: STIS.sp.824552
Requested Signal/Noise Ratio = 20.000 at wavelength 1500.00 Å (per resolution element)
gives: Time = 759.9350 seconds
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Buffer time 90.7481 is less than minimum 99 seconds.
Table of Source and Noise Counts per Pixel
| 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 | 0.297 | 451.94 | 21.26 |
| Background | 0.001 | 1.60 | 1.26 |
| Sky | 3.485e-14 | 5.30e-11 | 7.28e-06 |
| Dark Current | 0.001 | 1.60 | 1.26 |
| Total in selected region | 0.298 | 453.53 | 22.60 |
| Brightest Pixel (single exposure) (at 1288.03 Å) | 0.266 | 201.80 | |
| Count rate entire detector | 22,039.020 | ||
| Buffer Time (sec) | 90.75 | ||
| 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. | |||
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| Global Count Rates | |||
| Source only | 13,181.592 | 10,017,153.294 | |
| Background (sky+dark) | 157.420 | 119,629.20 | |
| Encircled energy fraction | 0.95 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1425 |
| Grating: | [E140M] R ~ 45800 |
| Aperture: | 0.2X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: foo.txt |
| Extinction E(B-V): | None |
| Normalization: | None |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
Table of Source and Noise Counts per Pixel
These results were computed using: ETC version 24.2
