Presentation is loading. Please wait.

Presentation is loading. Please wait.

Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014 1 All sky camera, Lidar, and Electric Field Meter for the ASTRI SST-2M prototype for CTA G. Leto, R.

Similar presentations


Presentation on theme: "Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014 1 All sky camera, Lidar, and Electric Field Meter for the ASTRI SST-2M prototype for CTA G. Leto, R."— Presentation transcript:

1 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014 1 All sky camera, Lidar, and Electric Field Meter for the ASTRI SST-2M prototype for CTA G. Leto, R. Zanmar Sanchez, G. Bellassai, P. Bruno, M.C. Maccarone, E. Martinetti (for the ASTRI Collaboration and the CTA Consortium) All sky camera, Lidar, and Electric Field Meter for the ASTRI SST-2M prototype for CTA G. Leto, R. Zanmar Sanchez, G. Bellassai, P. Bruno, M.C. Maccarone, E. Martinetti (for the ASTRI Collaboration and the CTA Consortium)

2 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014 2 The ASTRI Program … in brief The ASTRI Program is an Italian Progetto Bandiera funded by the Ministry of Education, University and Research and led by INAF, the Italian National Institute of Astrophysics. Main goals: design, development and production, within the Cherenkov Telescope Array, CTA, framework and following its requirements, of an end-to-end prototype of a Dual-Mirror Small Size Telescope, SST-2M, devoted to the highest gamma-ray energy region (1-100 TeV) investigated by CTA, to be tested under field conditions in 2014, a SST-2M mini-array to be placed at the final CTA Southern Site during 2016, which would constitute the first seed of the CTA Observatory, the mirrors for the prototype of the CTA Medium Size Telescopes, MST. ASTRI, Astrofisica con Specchi a Tecnologia Replicante Italiana

3 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014 3 The ASTRI SST-2M telescope … devoted to investigate the VHE region, 1-100 TeV, in a wide field of view, 9.6° full FoV, making use of innovative technological solutions: a dual-mirror optics Schwarschild-Couder configuration, The prototype

4 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014 4 The ASTRI SST-2M telescope The prototype … and: a compact focal plane camera (50x50x50 cm 3 ) based on Si-PMs sensors managed by a specifically designed front-end electronics.

5 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014 5 The site for the ASTRI prototype Serra La Nave (SLN) The ASTRI SST-2M prototype will be placed, at the INAF M.G. Fracastoro observing station located in Serra La Nave on the Etna Mountain near Catania. Latitude: 37° 41 05 N Longitude: 14° 58 04 E Altitude: 1735 m a.s.l After the verification tests, devoted to probe the technological solutions adopted, the ASTRI SST-2M prototype will perform scientific observations on the Crab Nebula and on some of the brightest TeV sources … Serra La Nave The ASTRI SST-2M telescope is an end-to-end prototype that will be tested on field.

6 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014 6 The site for the ASTRI prototype Monitoring the atmosphere at SLN – Auxiliary Instrumentation Qui aggiungerei la lista della strumentazione ausiliaria a SLN, in senso lato, (Weather Station, EFM, Lidar, All-sky camera, Pludix, UVscope, …) ponendo in evidenza quella di cui tratterà la presentazione stessa. Da qualche parte cera una slide di questo tipo … mò la cerco!

7 7 Auxiliary Instrumentation at SLN The Electric Field Meter, EFM Developed by the INAF Radio Astronomy Institute (IRA), contact Federico Perini Field-Mill sensor 7 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

8 8 Auxiliary Instrumentation at SLN EFM at work Etna Eruption 23 November, 2013 8 8 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

9 9 Auxiliary Instrumentation at SLN EFM – SLN alarm output Can issue alarms NO distance/direction (3 EFM needed!) Can detect lightning distance > 7 km!! Event 7 km far from station

10 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014 10 Auxiliary Instrumentation at SLN EFM – SLN output alarms Jan 5 2014 storm First derivative Signal + Alarm bits Alarm bits issued from software are weighted to create an alert to ASTRI SST-2M Can issue alarms NO distance/direction (3 EFM needed!) Can detect lightening distance > 7 km!!

11 11 Auxiliary Instrumentation at SLN Raman Lidar - AMPLE Build for the VAMOS SEGURO project by CNISM, Napoli (contact Nicola Spinelli) 11 AMPLE characteristics Elastic channel at 355nm. Polarization measurements available. Raman channel at 386nm. Raw spatial resolution from 30cm to 30m Can be pointed from software 11 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

12 Auxiliary Instrumentation at SLN Raman Lidar - EARLINET Part of EARLINET since 2013: atmosphere monitoring routinely carried out. Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

13 13 Auxiliary Instrumentation at SLN All-Sky Camera, ASC SBIG All-Sky Camera 340C Kodak KAI-340 CCD 640x480 Exposure time 50 microseconds to 180 sec One image every five minutes 13 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

14 14 Auxiliary Instrumentation at SLN ASC: Color = Bayer Filter 14 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

15 15 Auxiliary Instrumentation at SLN ASC: Cloud Detection 15 Statistics of cloud cover for the SST-2M site day and night. Support SST-2M observations. 15 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

16 16 Auxiliary Instrumentation at SLN ASC- Thresholding 16 Usually the 3 RGB channels are turned into one: R-B or R/B (Long et al. 2006) RGB turned into HSL and L is used (Souza-Echer et al 2006) Euclidean Geometric Distance (Sylvio et al 2010) 16 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

17 17 Auxiliary Instrumentation at SLN ASC - Thresholding 17 Classified by eye 25,000 images into clear sky, overcast, lunar phase, sun altitude. Principal Component Analysis 17 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

18 18 Auxiliary Instrumentation at SLN ASC - Thresholding 18 Principal Component Analysis Eigenvector EigenvalueRGB 9.2e70.50.6 1.6e60.70.1-0.7 2.9e4-0.50.8-0.4 18 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

19 19 Auxiliary Instrumentation at SLN ASC - Thresholding 19 Principal Component Analysis 19 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

20 20 Auxiliary Instrumentation at SLN ASC - Thresholding 20 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

21 21 Auxiliary Instrumentation at SLN ASC - Thresholding 21 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

22 22 Auxiliary Instrumentation at SLN ASC - Star Counting 22 Find stars 22 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

23 23 Auxiliary Instrumentation at SLN ASC - Star Counting 23 Confront with a catalog We need an accurate transformation between pixel and celestial coordinates ZEA projection Distortions modeled with 6 order polynomial series 23 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

24 24 Auxiliary Instrumentation at SLN ASC - Star Counting 24 Discard Outliers Fit for the magnitude transformation zeropoint12.7+-0.2 slope1.04+-0.02 24 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

25 25 Auxiliary Instrumentation at SLN ASC - Star Counting Tiling 25 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

26 26 Auxiliary Instrumentation at SLN ASC - Star Counting 26 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

27 27 Auxiliary Instrumentation at SLN ASC - Star Counting 27 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

28 Auxiliary Instrumentation at SLN ASC - Star Counting 28 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014

29 Auxiliary Instrumentation at SLN Conclusions and Future Work 29 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014 All Sky Camera: Thresholding Try extra rotation to turn problem one-dimensional Work cases with the moon in the sky Sunset and sunrise All Sky Camera: Star counting Build our own catalog EFM: Deliver real alerts to ASTRI SST-2M software (dummy software already implemented) Lidar: Data taken during ASTRI SST-2M observation will be available to define the real sky condition

30 Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014 30 The ASTRI Program http://www.brera.inaf.it/astri/


Download ppt "Leto et al. – 2nd AtmoHEAD, Padua – 19-21 May 2014 1 All sky camera, Lidar, and Electric Field Meter for the ASTRI SST-2M prototype for CTA G. Leto, R."

Similar presentations


Ads by Google