ETC Request ID: STIS.sp.1049584
Exposure time (seconds) = 950.0000 at wavelength 1425.00 Å
gives: SNR = 2.7257 (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 2 pixels high) | (1 pix x 2 pix) | (2 pix resel x 2 pix) | |
| Source | 0.004 | 7.96 | 2.82 |
| Background | 3.000e-04 | 0.57 | 0.75 |
| Sky | 4.329e-13 | 8.22e-10 | 2.87e-05 |
| Dark Current | 3.000e-04 | 0.57 | 0.75 |
| Total in selected region | 0.004 | 8.53 | 2.92 |
| Brightest Pixel (single exposure) (at 1214.10 Å) | 0.013 | 12.59 | |
| Count rate entire detector | 2,080.967 | ||
| Buffer Time (sec) | 961.09 | ||
| 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 | 1,810.528 | 1,720,001.965 | |
| Background (sky+dark) | 270.438 | 256,916.40 | |
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | |
| Grating: | [G140L] R ~ 1000 |
| Aperture: | 52X0.2 |
| Glow region: | low |
| Target: [extended source] | |
| Source diameter (arcsec): | 34.5 |
| Spectrum: | Non-stellar Objects SSP 5 Myr Z=0.08 BC [91.0, 1600000.0 Å] |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.02 applied before normalization |
| Normalization: | Flux 16.74 abmag at 0.153 μ |
| Redshift: | z=0.005 |
| 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
