Wilga 2007 π of the Sky Full π system and simulation Janusz Użycki Faculty of Physics Warsaw University of Technology

Wilga π of the Sky Plan Introduction to the „Full Pi system” Overview of the new system Mount’s facilities, interfaces of cameras Simulation: hardware and software Hierarchy of modules, structures Results

Wilga π of the Sky Gamma Ray Bursts (GRB) Discovered in 1967 by spying satellites of USA Energy: 10 milliards years of the Sun life Duration: s Distance: up to 13 milliards light years Intensity: per day (currently observed by satellites) Origin: outside of the Galaxy - hipernova – massive star collaps to a black hole? - merging two neutron stars into a black hole?

Wilga π of the Sky Gamma Ray Bursts (GRB)

Wilga π of the Sky Gamma Ray Bursts (GRB) Galactic coordinates

Wilga π of the Sky „Pi of the Sky” What is it? The project is being prepared by Soltan Institute for Nuclear Studies in collaboration with: Center of Theoretical Physics, Polish Academy of Science Warsaw University Warsaw University of Technology other universities and institutes

Wilga π of the Sky The main goals Research of short timescale (1s...1year) astrophysical phenomena Search for extragalactic optical counterparts of Gamma Ray Bursts (GRB), determination of limits Exploration for variable stars (periodic and aperiodic changes of a star magnitude) Investigation for new stars

Wilga π of the Sky The main goals The whole celestial sphere covering Each “Full Pi” system covers two steradians (¼ of the Sky → π ) Minimal response time on events like GCN alerts (GRB Coordinates Network)

Wilga π of the Sky Prototype

Wilga π of the Sky Las Campanas Observatory (LCO) ASAS experiment dome

Wilga π of the Sky Las Campanas Observatory (LCO) 2 CCD cameras (own developed construction) The matrix: 2k × 2k pixels Field of view (FOV): 20º × 20º Range: m (1 frame), m (20 frames) Parallactic motorized mount (own construction) Time to target below a minute 3 PC computers for control and analysis Ethernet network, UPS, power control, etc.

Wilga π of the Sky Triggers and alerts - strategy Scan of the Sky two times per night Self-trigger – on-line flash recognition Following SWIFT satellite FOV Following INTEGRAL satellite FOV Following up with ASAS 25cm telescope Reaction to other GCN alerts Observing some objects from GTN's list (GTN: Global Telescope Network)

Wilga π of the Sky Modules of Pi software (LCO)

Wilga π of the Sky Full Pi system The main idea The Canary Islands Two sides: parallax effect usage ~150km apart (eg. La Palma + Tenerife) 1 pixel parallax gives km distance to object

Wilga π of the Sky Full Pi system features 2× 16 CCD cameras The matrix: 2k × 2k pixels FOV: 16 × (20º × 20º) ≈ 2 steradians Canon optics: f = 85mm, f / d = 1.2 Range: 12 m (1 frame), 14 m (20 frames) 2× 4 parallactic robotic mount Two modes: side-by-side (WIDE) or common-target (DEEP) 2× 24 PC computers for control and analysis 3000 frames = 25 GB / night / camera Ethernet networks, power system, etc.

Wilga π of the Sky Ethernet networks diagram (Full Pi system)

Wilga π of the Sky Ethernet networks diagram (Full Pi system)

Wilga π of the Sky

Wilga π of the Sky New parallactic mount controlled via CAN / Ethernet DEEP / WIDE mode

Wilga π of the Sky New CCD camera Digital part Analog part Power part USB interface and Ethernet interface

Wilga π of the Sky NUDPSIM (camera on a mount simulator) Camera Simulator LOG: internal + LOG4PI Configuration file + parameters Optional FIT file loading Opened / closed shutter simulation Optional saving frames as FIT files

Wilga π of the Sky CCD 3D orientation (mount simulator) W E equator meridian γ Position:

Wilga π of the Sky CCD 3D orientation (sky simulator) RA DEC φ φ

Wilga π of the Sky Results LCO and camera simulator RA = hours DEC = deg OBJECT S PIXSCALE = pixel size: 15  m × 15  m

Wilga π of the Sky The nearest future Cooperation tests of several camera’s and mount’s simulators with different combination of computers and sub-networks structures Tests the new Pi-software (piman master, piman, mount and DAQ) of the system before plug in the real hardware devices