Plot page

Source, observation properties and instrument configuration is repeated and can be edited. Please note that GMACS has a red and blue side configured individually. If edited any of these, please press the Replot button to refresh the plots. The plot consists of three rows showing

1. Signal-to-Noise ratio and the selected filter for renormalization
2. Flux and background flux
3. Counts per pixes and noise-counts

For GMACS this is shown per side. You can adjust the plot height using the slider above the plots.

If you hover over any plot it will show some icons at the top right. Left to right they are for

• downloading the plot as png-file
• manually zooming into an area after selecting it via mouse (all three rows will zoom automatically)
• panning
• zoom in
• zoom out
• autoscale (useful if the background is too high above the signal flux)
• reset axes (return to original settings)
• toggle spike lines (dashed lines to x- and y-axis)
• show closest data oh hover
• compare data on hover

Download config

Press this button to receive a file with the current configuration. You can save, edit and later upload it again on the home page. Please note that edited files will be rejected if any of the parameters is out of limits or you try to specify a grating or central wavelength SAO-ETC does not know of.

Download data

You will receive a tgz (gzipped tar-file) with data tables used for the plots. For GMACS red and blue side have separate files. Each file comes in csv-format (comma separated values) with header. The columns are

1. wavelen - wavelength in microns
2. cspecn - noise per exposure time per pixel
3. counts - counts per exposure time per pixel
4. bcounts - background counts per exposure time per pixel
5. flux - F-lambda flux
6. fluxmask - smoothed mask for flux
7. bflux - background F-lambda flux
8. snr - signal / noise
9. thrufilt - interpolated band filter throughput

Clean up

Your configuration is stored in an internal database for smooth navigation between pages. In addition it allows you to copy and paste the link and use it at a later time. However, this link could be guessed by others and because SAO-ETC does not require any login, we can not prevent them from accessing them. We do not regard the configuration data as sensitive.

However, if you think otherwise, please use the Clean up button to delete your configuration from the database. If you download the configuration file before you clean up, you can upload the file at a later point. In this case the configuration will be newly created from the uploaded file.