ETC Request ID: STIS.sp.827222
Exposure time (seconds) = 275.0000 at wavelength 2987.60 Å
gives: SNR = 26.0580 (per resolution element)
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Buffer time 47.5731 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 | 1.284 | 706.25 | 26.58 |
| Background | 0.011 | 5.78 | 2.40 |
| Sky | 4.012e-10 | 2.21e-07 | 4.70e-04 |
| Dark Current | 0.011 | 5.78 | 2.40 |
| Total in selected region | 1.295 | 712.02 | 27.10 |
| Brightest Pixel (single exposure) (at 2796.25 Å) | 0.835 | 229.61 | |
| Count rate entire detector | 42,040.578 | ||
| Buffer Time (sec) | 47.57 | ||
| 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 | 37,297.431 | 10,256,793.530 | |
| Background (sky+dark) | 1,572.865 | 432,537.95 | |
| Encircled energy fraction | 0.93 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 2912 |
| Grating: | [E230H] R ~ 114000 |
| Aperture: | 31X0.05NDA |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: zaur_hubeny_K4II_noneclipse_etc.dat |
| 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
