Getting the Liverpool Telescope ready for the alert deluge

Getting the Liverpool Telescope ready for the alert deluge

David Bersier
LOFAR Transients Key Project Meeting, Meudon, December 2011

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transientskp

June 23, 2012
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  1. LOFAR transients and the Liverpool Telescope Responding to LOFAR transient

    alerts with the Liverpool Telescope David Bersier ARI – Liverpool John Moores University LOFAR TKP – Meudon – December 14 2011
  2. LOFAR transients and the Liverpool Telescope The Liverpool telescope 2.0

    metre f/10 ALT/AZ Fully Robotic (no human involved in operations) Folding mirror, allowing support of up to 5 instruments Instrument change time ≤ 30 seconds Fully opening enclosure (no delays for ToO) Owned, operated and maintained by Liverpool JMU (30% of time for internal use).
  3. LOFAR transients and the Liverpool Telescope Instruments RATCam Optical imaging:

    4.6’×4.6’ field of view Binning possible (default 2x2) Sloan-like ugriz, BV, Hα
  4. LOFAR transients and the Liverpool Telescope Instruments RATCam Optical imaging:

    4.6’×4.6’ field of view Binning possible (default 2x2) Sloan-like ugriz, BV, Hα RINGO2 - optical polarimeter 4’×4’ field; broad ”V+R” filter Measure polarization variations on short timescales (seconds)
  5. LOFAR transients and the Liverpool Telescope Instruments RATCam Optical imaging:

    4.6’×4.6’ field of view Binning possible (default 2x2) Sloan-like ugriz, BV, Hα RINGO2 - optical polarimeter 4’×4’ field; broad ”V+R” filter Measure polarization variations on short timescales (seconds) RISE - fast readout CCD Single ”V+R” filter 9.2’×9.2’ field, 0.54”/pixel Minimum exposure time 1.5s
  6. LOFAR transients and the Liverpool Telescope Instruments RATCam Optical imaging:

    4.6’×4.6’ field of view Binning possible (default 2x2) Sloan-like ugriz, BV, Hα RINGO2 - optical polarimeter 4’×4’ field; broad ”V+R” filter Measure polarization variations on short timescales (seconds) RISE - fast readout CCD Single ”V+R” filter 9.2’×9.2’ field, 0.54”/pixel Minimum exposure time 1.5s FRODOSpec: Spectrograph IFU: 12x12 lenslets 0.82” Blue Red λ/∆λ 2600 2200 λ 3900-5700 5800-9400 λ/∆λ 5500 5300 λ 3900-5100 5900-8000 Data reduction pipeline provides reduced spectrum
  7. LOFAR transients and the Liverpool Telescope Instruments RATCam Optical imaging:

    4.6’×4.6’ field of view Binning possible (default 2x2) Sloan-like ugriz, BV, Hα RINGO2 - optical polarimeter 4’×4’ field; broad ”V+R” filter Measure polarization variations on short timescales (seconds) RISE - fast readout CCD Single ”V+R” filter 9.2’×9.2’ field, 0.54”/pixel Minimum exposure time 1.5s FRODOSpec: Spectrograph IFU: 12x12 lenslets 0.82” Blue Red λ/∆λ 2600 2200 λ 3900-5700 5800-9400 λ/∆λ 5500 5300 λ 3900-5100 5900-8000 Data reduction pipeline provides reduced spectrum SkyCam All-sky/Twenty/Zoom (mlim 6, 12, 18) 10s exposure every minute
  8. LOFAR transients and the Liverpool Telescope Instruments Future instruments: Simultaneous

    O+IR+Tip-tilt IO:Optical (in commissioning) Optical camera, 4k×4k array 10’×10’ field, ugriz, BV, Hα for 0 ≤ z ≤ 0.06
  9. LOFAR transients and the Liverpool Telescope Instruments Future instruments: Simultaneous

    O+IR+Tip-tilt IO:Optical (in commissioning) Optical camera, 4k×4k array 10’×10’ field, ugriz, BV, Hα for 0 ≤ z ≤ 0.06 IO:Infrared (∼ end 2012) 2k×2k array 5’×5’ field, JH filters
  10. LOFAR transients and the Liverpool Telescope Phase 2 and ToO

    Operating modes 1. Science Control Agent - Phase 2 database driven Insert observations via Java interface Entry via menus for specific science programmes 2. Target of Opportunity Mode: Immediate abort of current observing Driven by scripts
  11. LOFAR transients and the Liverpool Telescope Phase 2 and ToO

    Operating modes
  12. LOFAR transients and the Liverpool Telescope Phase 2 and ToO

    Operating modes
  13. LOFAR transients and the Liverpool Telescope Phase 2 and ToO

    Operating modes Target of opportunity:
  14. LOFAR transients and the Liverpool Telescope LOFAR alerts Current capability

  15. LOFAR transients and the Liverpool Telescope LOFAR alerts Current capability

    Operational model: Subscribe to VOEvent streams through Skyalert.org
  16. LOFAR transients and the Liverpool Telescope LOFAR alerts Current capability

    Operational model: Subscribe to VOEvent streams through Skyalert.org Receive email alerts (CRTS, SWIFT)
  17. LOFAR transients and the Liverpool Telescope LOFAR alerts Current capability

    Operational model: Subscribe to VOEvent streams through Skyalert.org Receive email alerts (CRTS, SWIFT) Parse, decide if worth observing
  18. LOFAR transients and the Liverpool Telescope LOFAR alerts Current capability

    Operational model: Subscribe to VOEvent streams through Skyalert.org Receive email alerts (CRTS, SWIFT) Parse, decide if worth observing If yes, create RTML document (either std phase 2 or ToO)
  19. LOFAR transients and the Liverpool Telescope LOFAR alerts Current capability

    Operational model: Subscribe to VOEvent streams through Skyalert.org Receive email alerts (CRTS, SWIFT) Parse, decide if worth observing If yes, create RTML document (either std phase 2 or ToO) Submit to telescope
  20. LOFAR transients and the Liverpool Telescope LOFAR alerts Current capability

    Operational model: Subscribe to VOEvent streams through Skyalert.org Receive email alerts (CRTS, SWIFT) Parse, decide if worth observing If yes, create RTML document (either std phase 2 or ToO) Submit to telescope Observations are done (available after 10 min)
  21. LOFAR transients and the Liverpool Telescope LOFAR alerts Current capability

    Operational model: Subscribe to VOEvent streams through Skyalert.org Receive email alerts (CRTS, SWIFT) Parse, decide if worth observing If yes, create RTML document (either std phase 2 or ToO) Submit to telescope Observations are done (available after 10 min) Software (Python) still in development/testing phase. Basic steps in place
  22. LOFAR transients and the Liverpool Telescope LOFAR alerts Automated response

    Eventually, similar to current GRB response pipeline: direct socket communication online data reduction
  23. LOFAR transients and the Liverpool Telescope LOFAR alerts Automated response

    Eventually, similar to current GRB response pipeline: direct socket communication online data reduction Advantages: We are in charge; easy to adapt observations to the science.
  24. LOFAR transients and the Liverpool Telescope LOFAR alerts Automated response

    Eventually, similar to current GRB response pipeline: direct socket communication online data reduction Advantages: We are in charge; easy to adapt observations to the science. pre-defined observations tailored to targets/science (brightness, object type)
  25. LOFAR transients and the Liverpool Telescope LOFAR alerts Automated response

    Eventually, similar to current GRB response pipeline: direct socket communication online data reduction Advantages: We are in charge; easy to adapt observations to the science. pre-defined observations tailored to targets/science (brightness, object type) Possibility to make complex observing requests (multiple filters, monitoring, multiple instruments)
  26. LOFAR transients and the Liverpool Telescope LOFAR alerts Automated response

    Eventually, similar to current GRB response pipeline: direct socket communication online data reduction Advantages: We are in charge; easy to adapt observations to the science. pre-defined observations tailored to targets/science (brightness, object type) Possibility to make complex observing requests (multiple filters, monitoring, multiple instruments) Phase 2 or ToO
  27. LOFAR transients and the Liverpool Telescope LOFAR alerts Automated response

    Eventually, similar to current GRB response pipeline: direct socket communication online data reduction Advantages: We are in charge; easy to adapt observations to the science. pre-defined observations tailored to targets/science (brightness, object type) Possibility to make complex observing requests (multiple filters, monitoring, multiple instruments) Phase 2 or ToO Data reduction pipeline being developed (TAPAS – img subtraction)
  28. LOFAR transients and the Liverpool Telescope Ready to observe Format

    of alerts. Impossible to observe every alert. Give us as much information as possible
  29. LOFAR transients and the Liverpool Telescope Ready to observe Format

    of alerts. Impossible to observe every alert. Give us as much information as possible