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A watchlist is a set of points in the sky, together with a radius in arcseconds. It is assumed to be a list of "interesting" sources, so that any transient that falls within the radius of one of the sources might indicate activity of that source. Each user of the Lasair system has their own set of watchlists, and can be alerted when a ZTF transient is coincident with a watchlist source.

You can create a watchlist of sources by preparing a text file, where each comma-separated line has an identifier for the source, then the RA and Dec in decimal degrees. One way to do this is with Vizier and a spreadsheet program such as Excel or Numbers. Here is an example of the CSV data. The 42 entries are BL Lac candidates for TeV observations (Massaro+, 2013)

An "Active" watchlist is one that is compared immediately when new ZTF candidates are ingested, with an alert sent immediately to the owner of the watchlist. (This feature is not yet implemented).

To create your own watchlists, you must log in.

Public Watchlists

Watchlists created and made public are listed below. Click on the name of the watchlist for more information and crossmatching.
Name Owner Description Radius Active
BL Lac for TeV Roy Williams BL Lac candidates for TeV observations (Massaro+, 2013) 0.5 arcsec
AM CVn Roy Williams These are 56 very close binaries of compact objects, from "The physical properties of AM CVn stars: new insights from Gaia DR2", Ramsey et al, https://arxiv.org/abs/1810.06548 5.0 arcsec