ETC Request ID: STIS.sp.820568
Exposure time (seconds) = 2,200.0000 at wavelength 1808.00 Å
gives: SNR = 30.2030 (per resolution element)
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 | 0.245 | 1,077.57 | 32.83 |
| Background | 0.011 | 46.20 | 6.80 |
| Sky | 8.882e-11 | 3.91e-07 | 6.25e-04 |
| Dark Current | 0.011 | 46.20 | 6.80 |
| Total in selected region | 0.255 | 1,123.77 | 35.68 |
| Brightest Pixel (single exposure) (at 2192.45 Å) | 0.435 | 957.63 | |
| Count rate entire detector | 13,139.308 | ||
| Buffer Time (sec) | 152.22 | ||
| 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 | 9,107.432 | 20,036,349.551 | |
| Background (sky+dark) | 1,572.864 | 3,460,300.89 | |
| Encircled energy fraction | 0.92 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 1978 |
| Grating: | [E230M] R ~ 30000 |
| Aperture: | 0.2X0.2 |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: sk-675IUE_coadded.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
