ETC Request ID: STIS.sp.820955
Exposure time (seconds) = 2,431.0000 at wavelength 1300.00 Å
gives: SNR = 56.5764 (per resolution element)
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Buffer time 72.3247 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 | 0.827 | 4,018.65 | 63.39 |
| Background | 0.001 | 5.11 | 2.26 |
| Sky | 8.434e-15 | 4.10e-11 | 6.40e-06 |
| Dark Current | 0.001 | 5.11 | 2.26 |
| Total in selected region | 0.828 | 4,023.76 | 71.03 |
| Brightest Pixel (single exposure) (at 1297.42 Å) | 0.290 | 704.76 | |
| Count rate entire detector | 27,653.085 | ||
| Buffer Time (sec) | 72.32 | ||
| 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 | 16,563.649 | 40,266,229.722 | |
| Background (sky+dark) | 157.420 | 382,688.75 | |
| Encircled energy fraction | 0.93 | ||
| 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: | Black body at 55000.0K |
| Extinction E(B-V): | None |
| Normalization: | Flux 5.5e-12 flam at 1300.0 Å |
| 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
