LSQ to PESSTO Marshall Dataflow

To minimise the timescale between the discovery-time (observation time of an LSQ frame containing a new transient) and the time an LSQ object appears as a new ticket in the PESSTO Marshall, we need to minimise the upper timescales shown in the following dataflow diagram.

Using a traffic light system for the time-scales:

Red = To be reduced
Orange = Could possibly be improved/unknown
Green = Cannot be reduced further

Note PESSTO users need to sign into the wiki to view the diagram. Once signed-in, to edit the diagram click on link at the bottom of image.

LSQ PESSTO Marshall Dataflow


Examples of time delays

Latest discoveries from LSQ marked Discovery Date = 20140817
  1. LSQ14efn (LSQ link here) : first detection above V=20 was 20140805, 12 days before it appeared on the LSQ pages as discovered.  What caused the delay ? As a counter example LSQ14eer was first detected at V=20 on 20140814 and appeared on LSQ pages on 20140816. Big difference between the latency for LSQ14efn and LSQ14eer
  2. LSQ14eft and LSQ14elf : discoveries on 20140817, but no recalibrated forced photometry. 

Other Notes


Here's the the workflow for filtering LSQ objects:  
  • Reference image has a galaxy nearby  
    1. If candidate is off the center of the galaxy, call it   SNe nice  
    2. If candidate is on center  of galaxy call it              SNe ? 
  • Reference image has a pointlike object at location of candidate , look at past history  
    1.  If no significant previous variability ,  SNe or Variable   
    2. If history shows supernova-like light curve, call it SNe nice
  • Reference image has nothing at location of candidate, look at past history  
    1. If no significant previous history call it  hostless SNe


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