Palomar Transient Factory

Transcript

1. Palomar Transient Factory Kolby Weisenburger 18 February 2016
2. !  Description of the observatory !  Science objectives !  Data reduction and products !  Discoveries !  Future work Palomar Transient Factory
3. Palomar Transient Factory P60 P48 P200
4. P48 P48 -  48” telescope -  R (< 20.5 mag), g (< 21 mag), and Hα filters -  7.8 square degree FoV -  96 Megapixel camera -  Fully automated
5. P48 P48
6. P48 P48 POSS I & POSS II  
7. P200 P60 P48 P60 “SED machine” -  60” telescope -  Low-resolution integral field spectrograph -  Optical imager -  Rapid PTF follow-up
8. P200 P60 P48 P200 -  200” telescope -  Adaptive optics -  Wide-field cameras in IR and optical -  Four spectrographs -  PTF follow-up
9. Palomar Transient Factory P60 P48 P200
10. Timeline 2009 PTF first light 2017 Zwicky Transient Factory (ZTF) 2013 intermediate PTF (iPTF) 2014 DR1 2015 DR2 2016 DR3
11. Experiment Targets Setup 5-day cadence (5DC) SNe Ia, CC SNe, AGNs, QSOs, Novae, etc. 60 sec. exposures 8000 deg2 / year Dynamic cadence (DyC) Unexplored (fast) regimes RR Lyr, CVs, flare stars, SNe, etc. 60 sec. exposures 1 min – 5 day cadences Orion Field Transiting planets Single field Hα Hα sky survey Narrow-band on/off Hα Science Goals
12. Experiment Targets Setup 5-day cadence (5DC) SNe Ia, CC SNe, AGNs, QSOs, Novae, etc. 60 sec. exposures 8000 deg2 / year Dynamic cadence (DyC) Unexplored (fast) regimes RR Lyr, CVs, flare stars, SNe, etc. 60 sec. exposures 1 min – 5 day cadences Orion Field Transiting planets Single field Hα Hα sky survey Narrow-band on/off Hα Science Goals
13. Experiment Targets Setup 5-day cadence (5DC) SNe Ia, CC SNe, AGNs, QSOs, Novae, etc. 60 sec. exposures 8000 deg2 / year Dynamic cadence (DyC) Unexplored (fast) regimes RR Lyr, CVs, flare stars, SNe, etc. 60 sec. exposures 1 min – 5 day cadences Orion Field Transiting planets Single field Hα Hα sky survey Narrow-band on/off Hα Science Goals
14. Experiment Targets Setup 5-day cadence (5DC) SNe Ia, CC SNe, AGNs, QSOs, Novae, etc. 60 sec. exposures 8000 deg2 / year Dynamic cadence (DyC) Unexplored (fast) regimes RR Lyr, CVs, flare stars, SNe, etc. 60 sec. exposures 1 min – 5 day cadences Orion Field Transiting planets Single field Hα Hα sky survey Narrow-band Hα Science Goals
15. Rau et al. 2009
16. R-band coverage g-band coverage
17. Data Reduction 1.  HOTPAnTS (thank you, UW) for image subtraction High Order Transform of PSF And Template Subtraction
18. Data Reduction 2. Superbias, superflat, super science!
19. Data Reduction Superbias, superflat, super science! SExtractor Scamp Astrometry Astronmetry.net Cross-match to 2MASS DAOPHOT Zero-point correction Mask satellite tracks
20. Data Pipeline
21. Follow-up Capabilities Gemini  
22. Data Release 1 (April 2014) - Epochal (single exposure) images with photometric catalogs - Specific fields: M81, M82, M44, M42, Kepler field, Stripe 82, Cassiopeia A Science Products
23. Data Release 1 (April 2014) - Epochal (single exposure) images with photometric catalogs - Specific fields: M81, M82, M44, M42, Kepler field, Stripe 82, Cassiopeia A Data Release 2 (July 2015) - Released all northern sky data - 2.2 million exposures and catalogs - 30,000 coadded tiles Science Products
24. Science Products Data Release 1 (April 2014) - Epochal (single exposure) images with photometric catalogs - Specific fields: M81, M82, M44, M42, Kepler field, Stripe 82, Cassiopeia A Data Release 2 (July 2015) - Released all northern sky data - 2.2 million exposures and catalogs - 30,000 coadded tiles Data Release 3 (Fall 2016) - Searchable photometric database - Light curves for all sources
25. Data Access Infrared Processing and Analysis Center (IPAC) http://irsa.ipac.caltech.edu/applications/ptf/
26. Discoveries : Supernovae Nugent et al. 2011
27. Discoveries : Supernovae Cao et al. 2013
28. Discoveries : Supernovae Van Dyk et al. 2011
29. Discoveries : WD+Md pairs ( +planets? ) Law et al. 2011
30. Discoveries : Asteroids Waszczak et al. 2015
31. Discoveries : T Tauri exoplanet host Van Eyken et al. 2012
32. INSPIRAL MERGER RINGDOWN Hanford, Washington Livingston, Louisiana Discoveries : Gravitational waves?
33. INSPIRAL MERGER RINGDOWN Hanford, Washington Livingston, Louisiana LIGO “PTF responded automatically and promptly to the gravitational wave alerts from LIGO and imaged hundreds of square degrees of the localization that was accessible from Palomar Observatory…We obtained spectroscopic follow-up of our candidates from the Keck and Gemini observatories, radio follow-up from the Very Large Array, and X-ray follow-up from the Swift satellite.”
34. Zwicky Transient Factory Nine million dollars from NSF later… - 47 square degree FoV (>200 full moons!) - 3750 square degrees an hour - Complete Northern sky coverage in one night - Faster readout electronics -> order of magnitude faster than PTF - Three year program to begin in 2017 Particular emphasis on NEOs and LIGO follow-up
35. Get involved with PTF! iPTF Summer School July 16-20, 2016 Caltech Covers iPTF data and processing, statistical and machine learning techniques employed by the collaboration, as well as the rewards and challenges specific to time domain astronomy (get ready for LSST!)
36. Get involved with PTF! iPTF summer school July 17-20, 2016 Caltech