Getting the Liverpool Telescope ready for the alert deluge

Transcript

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