ETC Request ID: STIS.sp.1006680
Exposure time (seconds) = 380.0000 at wavelength 2987.60 Å
gives: SNR = 30.5287 (per resolution element)
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Buffer time 48.0513 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 7 pix) | (2 pix resel x 7 pix) | |
| Source | 1.276 | 969.42 | 31.14 |
| Background | 0.011 | 7.98 | 2.82 |
| Sky | 3.985e-10 | 3.03e-07 | 5.50e-04 |
| Dark Current | 0.011 | 7.98 | 2.82 |
| Total in selected region | 1.286 | 977.40 | 31.75 |
| Brightest Pixel (single exposure) (at 2796.25 Å) | 0.825 | 313.42 | |
| Count rate entire detector | 41,622.178 | ||
| Buffer Time (sec) | 48.05 | ||
| 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 | 36,911.809 | 14,026,487.540 | |
| Background (sky+dark) | 1,572.865 | 597,688.80 | |
| 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 25.2
