1. MPIfR PAF@Parkes Results from the A. Chippendale ATUC, 14 Nov 2016
Photo by J. Sarkissian
Astronomy and space science
ATUC, 14 Nov 2016

2. Modified ASKAP PAF on 64 m Parkes Telescope
Photo by Xinping Deng

3. MPIfR PAF System at Parkes
188 ports, 94 ports each polarization, 4 spare ports
36 beams x 2 pol x 336 MHz voltages streamed to GPUs (1 MHz resolution)
16 beams x 2 pol x 384 MHz spectra download (18 kHz resolution)
Tested 18 beams in streaming mode and 16 beams in spectral-line mode
ASKAP Software
One fiber for one port with full bandwidth, 12 DRX X 16 ports=192 ports;
One fiber with all ports, 8 BMF X 48MHz = 384 MHz
1 GPU node processes 3 beams with full bandwidth
PAF: 600 MHz
DRX: 600 MHz
BMF: 384 MHz
14 GPU nodes
Modified ASKAP PAF on 64 m Parkes Telescope

4. 1.4 GHz sensitivity patterns
PAF sensitivity envelope
Multibeam sensitivity
MPIfR PAF beam sensitivity
(credit L. Staveley Smith)
13 beams
17 beams

5. Effective FOV versus beam pitch (17 beams)
Modified ASKAP PAF on 64 m Parkes Telescope

6. Noise temperature of MPIfR PAF on Parkes 64 m maxSNR beam at boresight
Multibeam Tsys/h
Multibeam
(Chippendale et al., ICEAA 2016 arXiv: )

7. MPIPAF first HI astronomy
August 2016
No standing wave!
HIPSR first light: Oct 2011
(credit: L. Staveley-Smith and J. Rhee)

8. 21 cm spectrum of another galaxy HIPASS J040-48
Parkes 20 cm Multibeam
(HIPASS public data release v1.2, )
MPIfR PAF on Parkes
(credit: L. Staveley-Smith and J. Rhee, 18 kHz res.)
“Nice flat baseline” – L. Staveley-Smith
Modified ASKAP PAF on 64 m Parkes Telescope

9. Single port spectra at zenith (1.2-1.5 GHz)
Stats over continuous 2 s integrations for 6 hrs
Modified ASKAP PAF on 64 m Parkes Telescope

10. Single port spectra at zenith (0.7-1.2 GHz)
Stats over continuous 2 s integrations for 12 hrs
Modified ASKAP PAF on 64 m Parkes Telescope

11. Live RFI Mitigation Demonstration
with K. Bannister and G. Hellbourg (like ACES memo 12 test on ASKAP BETA)
Mitigation on vs. off
RFI Suppression (dB)
Modified ASKAP PAF on 64 m Parkes Telescope

12. HI gas in a young radio galaxy at z=0.44
ASKAP BETA
(Allison et al., MNRAS 2015)
Modified ASKAP PAF on 64 m Parkes Telescope

13. Murchison Radio-astronomy Observatory
Population 113
See Wilson et al. “The Australian Radio Quiet Zone...” in this session.
Modified ASKAP PAF on 64 m Parkes Telescope

14. Parkes
Population 15,000
Modified ASKAP PAF on 64 m Parkes Telescope

15. VLBI between PAF on Parkes and ATCA H-OH
(credit: Chris Phillips)
ASKAP-Parkes Fringes
Parkes Bandpass
Modified ASKAP PAF on 64 m Parkes Telescope

16. Just working versus blown out of the water...
Modified ASKAP PAF on 64 m Parkes Telescope

17. Modified ASKAP PAF on 64 m Parkes Telescope

18. Modified ASKAP PAF on 64 m Parkes Telescope

19. Beam 7
Beam 6
Beam 1
Beam 8
Beam 5
Beam 2
Beam 9
Beam 4
Beam 3
Vela Pulsar (J ): 3x3 Square Footprint on 0.215° Pitch, S1400 = 1.1 Jy
Modified ASKAP PAF on 64 m Parkes Telescope

20. Simultaneous timing of 3 pulsars
(Deng et al. in prep.)
Modified ASKAP PAF on 64 m Parkes Telescope

21. Polarisation calibration
Instrument modelled by single Jones matrix J
where
Solve for J that minimises square of difference between PAF measurement and PPTA reference measurement
Rotation by parallactic angle y and feed angle FA
Generic instrumental response
Modified ASKAP PAF on 64 m Parkes Telescope

22. Multi-epoch PAF observation of PSR J0437-4715 Offset beam (-0. 215°,-0
Multi-epoch PAF observation of PSR J Offset beam (-0.215°,-0.215°) in (cross-elevation,elevation)
(Deng et al. in prep.)
Modified ASKAP PAF on 64 m Parkes Telescope

23. PSR J0437-4715: normalised Stokes I
PPTA reference
PAF
PPTA reference from Dai et al., MNRAS 2015
(Deng et al. in prep.)
Modified ASKAP PAF on 64 m Parkes Telescope

24. PSR J0437-4715: degree of linear polarisation
PPTA reference
PAF
calibrated
PPTA reference
PAF
(Deng et al. in prep.)
PPTA reference from Dai et al., MNRAS 2015
Modified ASKAP PAF on 64 m Parkes Telescope

25. PSR J0437-4715: Stokes V (Deng et al. in prep.) calibrated
PPTA reference
PAF
calibrated
PPTA reference
PAF
(Deng et al. in prep.)
PPTA reference from Dai et al., MNRAS 2015
Modified ASKAP PAF on 64 m Parkes Telescope

26. PSR J0437-4715: position angle (Deng et al. in prep.) calibrated
PPTA reference from Dai et al., MNRAS 2015
Modified ASKAP PAF on 64 m Parkes Telescope

27. Jones matrix parameters
Single J works reasonably for 336 MHz band
abs_gain: 1.05 sys_phase: deg diff_gain_mod: diff_gain_arg: 9.16 deg leak_a_b_mod: dB leak_a_b_arg: 71.7 deg leak_b_a_mod: dB leak_b_a_ar: deg feed_angle: -2.0 deg
Low leakage
Modified ASKAP PAF on 64 m Parkes Telescope

28. Longer term (supporting science)
Next
More beams
Real-time event detection (FRBs)
Extended simultaneous timing of multiple pulsars (field rotation)
Refine beam calibraiton
elevation dependence, on-dish source, repeatability, spillover
Longer term (supporting science)
Reduce beam calibration overheads
Direction of arrival (DOA) estimation
Sky de-rotation via beamforming
RFI detection and mitigation
Modified ASKAP PAF on 64 m Parkes Telescope

29. Thanks to many R. Beresford S. Broadhurst A. Brown X. Deng D. George
G. Hobbs
S. Johnston
R. Karuppusamy
M. Kramer
M. Leach
M. Malenta
M. Marquarding
C. Phillips
B. Preisig
J. Reynolds
J. Rhee
T. Ruckley
M. Smith
L. Staveley-Smith
L. Spitler
J. Tuthill
T. Tzioumis
G. Wieching
.....
Modified ASKAP PAF on 64 m Parkes Telescope

30. Thank you Astronomy and Space Science
Photo by John Sarkissian
Astronomy and Space Science
Dr. Aaron Chippendale Senior Research Engineer t e w
Astronomy and space science