STScI Newsletter
2024 / Volume / Issue

About this Article

MAST Staff - 2024 Sep 30

Light curve previews go live in the MAST Portal

 

MAST has added a new, interactive light curve previewer! When searching for TESS and Kepler timeseries data in the MAST Portal, you will now see an lcviz icon next to compatible search results. Clicking the icon opens the interactive lcviz tool in a new window. This is one of multiple data browsing tools included in the Portal.

Lcviz is feature-rich and supports plotting of your target light curves. By default, a plot of flux vs. time is created. Any metadata included in the associated fits file is displayed in the "metadata" tab. For TESS mission products, you can customize this plot by selecting the flux column (e.g. SAP_FLUX, PDCSAP_FLUX) that you want to use.

Lcviz also supports many common techniques for analyzing light curve data. You can bin points to improve the signal-to-noise ratio, and perform a frequency analysis by generating a periodogram. Periodograms can be generated using either the Lomb-Scargle or Box Least Squares methods; stellar astrophysicists and planet hunters alike will find this useful! Users can also remove long-term trends from the data, using a wrapper of the lightkurve "flatten" feature.

Love the tool and want to use it locally? You can! Lcviz is fully compatible with Jupyter Notebooks.

 
an lcviz window for lamda leporis, showing three plots: a light curve, a phase folded light curve, and a periodogram
An interactive preview of the B-type star Lambda Leporis. You can try it out yourself by following this link to a Lambda Leporis Lcviz previewer.

Left: A light curve plot, with this star showing clear signs of variability.
Middle: A phase-folded light curve, generated from the highest peak of the periodogram.
Right: A lomb-scargle periodogram for this light curve, which has been zoomed in to show a secondary peak slightly less than two days.

 

 

Share This Page