Features

Fitting to Specific Data

The Transient Plotting tool was designed with gamma-ray burst events in mind which can be modeled as a series of power laws. If the light curve exhibits multiple power laws, then fitting a line to the entire light curve will not produce any useful information.

The Transient Plotting tool allows users to fit to only certain sections of the data. To do this, the tool only fits to the data that is displayed in the window. There are three ways to change the displayed data:

• Users can shift + click to draw a window around the desired data. This will zoom to highlighted area.

• Users can click and drag on the window to pan around as well as use the scroll wheel to zoom.

• There are + and - buttons near the bottom right of the page that will zoom or un-zoom to/from the center the center of the window. Additionally, there is a Reset View button that will display all of the data in the window.

Although only the data in the window is used to do the fitting, the modeled line will be plotted across all of the data. This helps the user visualize if there is a change in slope in the data.

Uploading CSV Data

Photometry data measured using Skynet's Afterglow can be saved as a CSV. This CSV can be uploaded to the Transient Plotting tool by clicking the Upload Data File button. The table will be populated and the data will be displayed in the window.

Shifting Data

If multiple filters were used to observe the target, the data can become crowded in the window. The Data form underneath the display window can be used to shift each set of filtered data up or down without changed their actual photometry values.

The Data form will already be populated with each filter followed by the value its shifted by. To shift the data, change the value after the filter. For example, B + 1 will shift all of the B filtered data to 1 higher magnitude in the viewer. This is a visual shift only and the original magnitudes will used when fitting.