Transients Classification Tools

Gosia Pietka

Transcript

1. Transients Classification Tools TKP meeting 4 Dec 2012, Amsterdam Gosia Pietka, Rob Fender, Adam Stewart, Teo Muñoz-Darias
2. TraP process flow   Data Imaging Source Finder Initial classification based on the radio information Classification based on radio + optical data No  further   observa.ons   Fast ToO Slow ToO Slow Fast Not exciting Request for more observations Optical, X-ray, radio follow up
3. Van der Laan Synchrotron Bubble Model −  ℎ∝     ≫1   ≪1    ℎ    ℎ   ≈1  
4. Flux as a function of time  
5.   Phase 1: Slope
6.   Phase 1: Slope
7. Phase 1: Slope (Pietka & Fender in prep.) Peak  radio  luminosity  [erg/s]  vs  rising  rate  of  the  lightcurve   Slow Fast
8.     Probability  distribu:on  of  source  classifica:on  a<er  the  first  measurement            SN            GRB   Blazar   XRB   Flare   Stars   QSO   Binary   AGN   TDE   Nova     Phase 1: Slope Slow   Fast  
9.   Phase 2: Slope + Rise Time
10. Phase 2: Slope + Rise Time (Pietka & Fender in prep.) Fast Fast Slow Slow  
11.   Phase 2: Slope + Rise Time Fast Fast
12.     Phase 2: Slope + Rise Time
13.   Phase 3: Slope + Rise Time + Decline time
14. Flux vs time for different types of objects Flux (Jy) Time(day) XRB     SN     Blazar  
15. Flux density at different frequencies  
16. TraP process flow   Data Imaging Source Finder Initial classification based on the radio information Classification based on radio + optical data No  further   observa.ons   Fast ToO Slow ToO Optical, X-ray, radio follow up Slow Fast Not exciting Request for more observations
17. •  RADIO/OPTICAL IDENTIFICATION of point sources (Stewart, Muñoz-Darias & Fender in prep.) "   Diagrams using Optical/IR/Radio fluxes and colours o  The simpler the better o  Quick identification of the nature of the transients: follow up? "  (simultaneous) Radio (few GHz), Optical (V/R bands): ★  Supernovae, Gamma Ray Burst ★  X-ray binaries, CVs, different flavours of pulsars ★  Active stars ( many thanks to Manuel Güdel) ★  QSOs - Radio (e.g. PKS) and optically selected (SLOAN)
18. Colour magnitude diagram
19. Conclusion     •  Radio  informa.on:   ü Slope   ü Rise  .me   ü Decline  .me   •  Radio  +  op.cal       •  Extrapola.on  of  the  results  to  the  lower  frequencies   data,  based  on  the  van  der  Laan  model  
20. Conclusion