smarttgit
commented
4 years ago What this specifically means for now is
Create a tab on the left hand bar on https://lasair.roe.ac.uk/ called "Sherlock"
Link this to a new page with the following text.
Sherlock Version 2.0
Sherlock is a software package and integrated massive database system that provides a rapid and reliable spatial cross-match service for any astrophysical variable or transient. The concept originated in the PhD thesis of D. Young at QUB, and has been developed by Young et al. in many iterations and cycles since. It associates the position of a transient with all major astronomical catalogues and assigns a basic classification to the transient. At its most basic, it separates stars, AGN and supernova-like transients. It has been tested within QUB on a daily basis with ATLAS and Pan-STARRS transients, and within PESSTO as part of the PESSTO marshall system that allows prioritising of targets. It is thus a boosted decision tree algorithm. A full paper describing the code, catalogues and algorithms is in preparation (Young et al. in prep). A summary is included in Section 4.2 of "Design and Operation of the ATLAS Transient Science Server" (Smith, Smartt, Young et al. 2020, submitted to PASP : https://arxiv.org/abs/2003.09052). We label the current version as the official release of Sherlock 2.0. The major upgrade from previous versions are that it includes Pan-STARRS DR1 (including the Tachibana & Miller 2018 star-galaxy separation index) and Gaia DR2 catalogues, along with some adjustments to the ranking algorithm.
That section is copied here and users should currently cite that paper (Smith et al. 2020) for Sherlock use :
Relevant part of Section 4.2 of Smith et al (paraphrased in some cases) :
Sherlock: Once an object ..... Ken - copy in the text here from the paper. You may have to adjust and remove references to Tables/Figures etc
The code for Sherlock is public ADD GITHUB LINK HERE but the code requires access to a number of large databases which are custom built from their original, public, releases. The latter is proprietary and therefore would require some effort from users to reproduce. As part of the Lasair project we are exploring public access to the integrated Sherlock code and database information through an API.
Sherlock 2.0 was reviewed as a LSST:UK Deliverable in March 2020. The review noted that an algorithm enhancement would be to take into account stellar proper motions, since some proper motion stars will be variable and if cross-matched with a static catalogue will fall outside the nominal match radius. This is an enhancement we will take forward for future versions.
genghisken
RoyWilliams
andyxerxes
Aimed at the user. Integration into Lasair website in separate card.