ETC Request ID: STIS.sp.636589
Exposure time (seconds) = 428.0000 at wavelength 2707.00 Å
gives: SNR = 42.9588 (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 | 2.218 | 1,898.72 | 43.57 |
| Background | 0.013 | 10.79 | 3.28 |
| Sky | 4.301e-08 | 3.68e-05 | 6.07e-03 |
| Dark Current | 0.013 | 10.79 | 3.28 |
| Total in selected region | 2.231 | 1,909.51 | 44.20 |
| Brightest Pixel (single exposure) (at 2548.02 Å) | 1.155 | 494.24 | |
| Count rate entire detector | 50,225.817 | ||
| Buffer Time (sec) | |||
| 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 | 39,299.511 | 16,820,190.573 | |
| Background (sky+dark) | 1,887.439 | 807,823.86 | |
| Encircled energy fraction | 0.93 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 2707 |
| Grating: | [E230M] R ~ 30000 |
| Aperture: | 0.2X0.2 |
| Target: [point source] | |
| Spectrum: | Standard HST Star Spectra BD+28°4211 (Op, 10.51) [1140.6, 10242.7 Å] |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.11 applied before normalization |
| 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 22.2
