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thespacedoctor / marshall_webapp_wiki

An object management and communication webapp for astronomical transient surveys
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ATLAS18nnf not recognised as SN2018ard #159

Closed Lightbulb500 closed 6 years ago

Lightbulb500 commented 6 years ago

ATLAS18nnf has appeared in the Marshall as a duplicate object of SN2018ard.

They are both correctly associated on both the ATLAS pages and the TNS

thespacedoctor commented 6 years ago

Ok so it took me all afternoon to track down the issue here. The flow of events to cause the duplication was:

  1. ASASSN discovered the source and reported to TNS with completely the wrong coordinates
  2. Marshall imports from TNS
  3. ASASSN silently correct the coordinates on TNS
  4. Marshall pulls in corrected coordinates for subsequent reports to TNS but continues to use the initial incorrect coordinates for future crossmatches
  5. ATLAS FP comes into Marshall and a crossmatch misses the original source in Marshall because coordinates are wrong and hence duplication

See the comments at the bottom of TNS page:

https://wis-tns.weizmann.ac.il/object/2018ard

thespacedoctor commented 6 years ago

Force photometry now correctly associated and duplicate removed:

http://www.pessto.org/marshall/transients/search?q=ATLAS18nnf