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Transients Classification Tools

transientskp
December 04, 2012

Transients Classification Tools

Gosia Pietka

transientskp

December 04, 2012
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  1. Transients Classification Tools
    TKP meeting
    4 Dec 2012, Amsterdam
    Gosia Pietka, Rob Fender, Adam Stewart, Teo Muñoz-Darias

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  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

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  3. Van der Laan Synchrotron Bubble Model
    −  ℎ∝    
    ≫1   ≪1  
     ℎ    ℎ  
    ≈1  

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  4. Flux as a function of time  

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  5.  
    Phase 1: Slope

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  6.  
    Phase 1: Slope

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  7. Phase 1: Slope
    (Pietka & Fender in prep.)
    Peak  radio  luminosity  [erg/s]  vs  rising  rate  of  the  lightcurve  
    Slow Fast

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  8.    
    Probability  distribu:on  of  source  classifica:on  a          SN  
             GRB  
    Blazar  
    XRB  
    Flare  
    Stars  
    QSO  
    Binary  
    AGN  
    TDE  
    Nova  
     
    Phase 1: Slope
    Slow   Fast  

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  9.  
    Phase 2: Slope + Rise Time

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  10. Phase 2: Slope + Rise Time
    (Pietka & Fender in prep.)
    Fast
    Fast
    Slow
    Slow  

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  11.  
    Phase 2: Slope + Rise Time
    Fast
    Fast

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  12.  
     
    Phase 2: Slope + Rise Time

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  13.  
    Phase 3: Slope + Rise Time + Decline time

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  14. Flux vs time for different types of objects
    Flux (Jy)
    Time(day)
    XRB  
     
    SN  
     
    Blazar  

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  15. Flux density at different frequencies
     

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  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

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  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)

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  18. Colour magnitude diagram

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  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  

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  20. Conclusion
     
     

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