Summary, Delegate Assembly, Fri Oct 28

Two delegate presenters shared their work during the first hour (~25 min each), Decker French and Brian Morsony.

Title: Characterizing Transients and Variability in Galaxy Nuclei with DP0.2 Data
Presenter: Decker French (@deckerkf)
Abstract: I will present a recent delegate contribution notebook available at delegate-contributions-dp02/nuclear, which demonstrates an example science case investigating nuclear transients and variability in galaxies. The simulated dataset in DP0.2 does not contain AGN variability or Tidal Disruption Events (TDEs), so we can use the data to characterize the underlying noise that will be present in real lightcurves of galaxy nuclei. This notebook also shows an example of using host galaxy properties to divide up variable sources to look at correlations with host galaxy color. This example notebook demonstrates how to cross match transients with host galaxies, analyze and plot the lightcurve properties of interesting transients, and compare transient properties for transients in different host galaxy types.

Title: How to do forced photometry at any location you want
Presenter: Brian Morsony (@bmorsony)
Abstract: I will present a tutorial on how to do photometry at a given location in individual visits, whether there is a source detected there or not (see the notebook in delegate-contributions-dp02/forced_photometry_at_location). This allows light curves to be constructed for transients over the whole Rubin dataset, including upper limits for non-detections. A possible use case would be looking at the locations of Rubin transients to see if there are any previous detection at the same location (e.g. it is a recurring or periodic transient). This could also be used for seeing if transients identified in other surveys, such as GRBs or X-ray and radio transients, are detected with Rubin, or placing upper limits on optical counterparts.