ETC Request ID: STIS.sp.821480
Requested Signal/Noise Ratio = 141.000 at wavelength 6392.00 Å (per resolution element)
gives: Time = 2,566.1479 seconds
gives: Time to Saturation (for a single exposure) = 1,851.30 seconds
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Partial overlap between instrument throughput band and target spectrum. Please doublecheck the wavelength range covered by the selected spectrum, and the instrument documentation for the selected filter.
Table of Source and Noise Counts per Pixel
| Detailed Information | Count rate | Total counts | Associated noise |
| (e-/s) | (e-) | (e-) | |
| Counts (box 7 pixels high) | (1 pix x pix) | (2.0 pix resel x pix) | |
| Source | 4.192 | 21,513.87 | 146.68 |
| Background | 0.135 | 690.67 | 26.28 |
| Sky | 0.002 | 8.07 | 2.84 |
| Dark Current | 0.133 | 682.60 | 26.13 |
| Read Out | 32.81 | ||
| Total in selected region | 4.326 | 22,204.54 | 152.58 |
| Brightest Pixel (single exposure) (at 6774.60 Å) | 17.825 | 22,871.19 | |
|
|
|||
| Global Count Rates | |||
| Source only | 1,683.993 | 4,321,374.903 | |
| Background (sky+dark) | 20,065.870 | 51,491,991.43 | |
| Encircled energy fraction | 0.91 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | CCD |
| Central Wavelength: | |
| Grating: | [G750L] R ~ 500 |
| Aperture: | 52X0.2 |
| Gain: | 1.0 |
| # Frames: | 2 |
| Binning: | dispersion: 1, spatial: 1 |
| Dark: |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: Mrk493_forETC_daeseong.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
