11

CORNISH WORKSHOP Leeds, 13th April 2007

James Green

CORNISH WORKSHOP Leeds, 13th April 2007

James Green

The Methanol Multibeam The Methanol Multibeam

ProjectProjectThe Methanol Multibeam The Methanol Multibeam

ProjectProject

MMB

QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

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The Methanol Multibeam The Methanol Multibeam Project:Project:

The TeamThe Team

The Methanol Multibeam The Methanol Multibeam Project:Project:

The TeamThe TeamR. J. Cohen, J. L. Caswell, K. R. J. Cohen, J. L. Caswell, K.

Brooks, M. G. Burton, A. Brooks, M. G. Burton, A. Chrysostomou, P. J. Diamond, Chrysostomou, P. J. Diamond, S. Ellingsen, G. A. Fuller, M. D. S. Ellingsen, G. A. Fuller, M. D. Gray, J. A. Green, M. G. Hoare, Gray, J. A. Green, M. G. Hoare,

M. R. W. Masheder, N. M. R. W. Masheder, N. McClure-Griffiths, M. McClure-Griffiths, M.

Pestalozzi, C. Phillips, L. Quinn, Pestalozzi, C. Phillips, L. Quinn, M. Thompson, M. Voronkov, A. M. Thompson, M. Voronkov, A. Walsh, D. Ward-Thompson, D. Walsh, D. Ward-Thompson, D. Wong-McSweeney, J. A. YatesWong-McSweeney, J. A. Yates.

R. J. Cohen, J. L. Caswell, K. R. J. Cohen, J. L. Caswell, K. Brooks, M. G. Burton, A. Brooks, M. G. Burton, A.

Chrysostomou, P. J. Diamond, Chrysostomou, P. J. Diamond, S. Ellingsen, G. A. Fuller, M. D. S. Ellingsen, G. A. Fuller, M. D. Gray, J. A. Green, M. G. Hoare, Gray, J. A. Green, M. G. Hoare,

M. R. W. Masheder, N. M. R. W. Masheder, N. McClure-Griffiths, M. McClure-Griffiths, M.

Pestalozzi, C. Phillips, L. Quinn, Pestalozzi, C. Phillips, L. Quinn, M. Thompson, M. Voronkov, A. M. Thompson, M. Voronkov, A. Walsh, D. Ward-Thompson, D. Walsh, D. Ward-Thompson, D. Wong-McSweeney, J. A. YatesWong-McSweeney, J. A. Yates.

33

ParticipantsParticipantsParticipantsParticipants

44

The 6.7 GHz Methanol MaserThe 6.7 GHz Methanol MaserThe 6.7 GHz Methanol MaserThe 6.7 GHz Methanol Maser

55

Why MMB? - Previous Why MMB? - Previous SurveysSurveys

Why MMB? - Previous Why MMB? - Previous SurveysSurveys

66

MMB 7-Beam ReceiverMMB 7-Beam ReceiverMMB 7-Beam ReceiverMMB 7-Beam Receiver

• Jointly built by Jodrell Jointly built by Jodrell Bank and ATNF.Bank and ATNF.

• Hexagonal layout Hexagonal layout pattern of 7 equal pattern of 7 equal receivers.receivers.

• Capable of dual Capable of dual polarisation over a polarisation over a large bandwidth. large bandwidth.

• Calibration with Calibration with noise injection noise injection sampled at 500Hz. sampled at 500Hz.

• Jointly built by Jodrell Jointly built by Jodrell Bank and ATNF.Bank and ATNF.

• Hexagonal layout Hexagonal layout pattern of 7 equal pattern of 7 equal receivers.receivers.

• Capable of dual Capable of dual polarisation over a polarisation over a large bandwidth. large bandwidth.

• Calibration with Calibration with noise injection noise injection sampled at 500Hz. sampled at 500Hz.

77

Survey Characteristics ISurvey Characteristics ISurvey Characteristics ISurvey Characteristics I• 4 MHz Bandwidth (4 MHz Bandwidth (180 km/s at 6668 MHz). 180 km/s at 6668 MHz). • Assume 150km/s fully useful bandwidth, so Assume 150km/s fully useful bandwidth, so

multiple centre velocities toward Galactic centre multiple centre velocities toward Galactic centre 10km/s overlap.10km/s overlap.

• Doppler tracking provided by the first two local Doppler tracking provided by the first two local oscillators. oscillators.

• Correlator configured to provide 2048 frequency Correlator configured to provide 2048 frequency channels across each 4 MHz band, at each line channels across each 4 MHz band, at each line frequency and each polarization. frequency and each polarization.

• Velocity resolution 0.09 km/s at 6668 MHz.Velocity resolution 0.09 km/s at 6668 MHz.• Spectra dumped every 5 seconds.Spectra dumped every 5 seconds.• System noise temperatures ~20 K.System noise temperatures ~20 K.

• 4 MHz Bandwidth (4 MHz Bandwidth (180 km/s at 6668 MHz). 180 km/s at 6668 MHz). • Assume 150km/s fully useful bandwidth, so Assume 150km/s fully useful bandwidth, so

multiple centre velocities toward Galactic centre multiple centre velocities toward Galactic centre 10km/s overlap.10km/s overlap.

• Doppler tracking provided by the first two local Doppler tracking provided by the first two local oscillators. oscillators.

• Correlator configured to provide 2048 frequency Correlator configured to provide 2048 frequency channels across each 4 MHz band, at each line channels across each 4 MHz band, at each line frequency and each polarization. frequency and each polarization.

• Velocity resolution 0.09 km/s at 6668 MHz.Velocity resolution 0.09 km/s at 6668 MHz.• Spectra dumped every 5 seconds.Spectra dumped every 5 seconds.• System noise temperatures ~20 K.System noise temperatures ~20 K.

88

Survey Characteristics IISurvey Characteristics IISurvey Characteristics IISurvey Characteristics II• HPBW 3.2 arcmin at 6668 MHz HPBW 3.2 arcmin at 6668 MHz

and 3.4 arcmin at 6035 MHz.and 3.4 arcmin at 6035 MHz.• Beams spaced by 6.46 arcmin on Beams spaced by 6.46 arcmin on

sky.sky.• Multibeam footprint is 15arcmin Multibeam footprint is 15arcmin

across.across.• SPOT and MX observations to SPOT and MX observations to

monitor variation in calibration. monitor variation in calibration. • Blocks of 2Blocks of 2O O in in ll, ±2, ±2OO in in bb. . • Continuous scanning at 0.1Continuous scanning at 0.1OO min min--

11..• Optimal Orientation.Optimal Orientation.• Beam Sensitivity consistent to Beam Sensitivity consistent to

±3.5%.±3.5%.

• HPBW 3.2 arcmin at 6668 MHz HPBW 3.2 arcmin at 6668 MHz and 3.4 arcmin at 6035 MHz.and 3.4 arcmin at 6035 MHz.

• Beams spaced by 6.46 arcmin on Beams spaced by 6.46 arcmin on sky.sky.

• Multibeam footprint is 15arcmin Multibeam footprint is 15arcmin across.across.

• SPOT and MX observations to SPOT and MX observations to monitor variation in calibration. monitor variation in calibration.

• Blocks of 2Blocks of 2O O in in ll, ±2, ±2OO in in bb. . • Continuous scanning at 0.1Continuous scanning at 0.1OO min min--

11..• Optimal Orientation.Optimal Orientation.• Beam Sensitivity consistent to Beam Sensitivity consistent to

±3.5%.±3.5%.

99

Results:Results: An Example Field An Example Field

Results:Results: An Example Field An Example Field

OBSERVATIONSOBSERVATIONS

LIVEDATALIVEDATA

GRIDZILLAGRIDZILLA

KVIS/KVIS/RESULTSRESULTS

1010

Survey ProgressSurvey ProgressSurvey ProgressSurvey Progress• Surveyed 106 degrees Surveyed 106 degrees

galactic longitude.galactic longitude.• Observed 528 masers, Observed 528 masers,

of which 218 new.of which 218 new.• 53/100 days Parkes 53/100 days Parkes

observing time.observing time.• Most new are weak Most new are weak

(S(Speakpeak < 4 Jy). < 4 Jy).• Narrow linewidths Narrow linewidths

(FWHM < 0.2 km/s).(FWHM < 0.2 km/s).• Far-side outer Galaxy Far-side outer Galaxy

detections.detections.

• Surveyed 106 degrees Surveyed 106 degrees galactic longitude.galactic longitude.

• Observed 528 masers, Observed 528 masers, of which 218 new.of which 218 new.

• 53/100 days Parkes 53/100 days Parkes observing time.observing time.

• Most new are weak Most new are weak (S(Speakpeak < 4 Jy). < 4 Jy).

• Narrow linewidths Narrow linewidths (FWHM < 0.2 km/s).(FWHM < 0.2 km/s).

• Far-side outer Galaxy Far-side outer Galaxy detections.detections.

1111

ObservationsObservations - regions surveyed - regions surveyedObservationsObservations - regions surveyed - regions surveyed

(180)

(270)(90)

(0/360)

1212

Observational DistributionObservational DistributionObservational DistributionObservational Distribution

ll vs vs bb

ll vs Velocity (LSR) vs Velocity (LSR)

0

-2.5

-2.0

-1.5

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

020406080100120140160180

1313

Survey Statistics - Galactocentric Survey Statistics - Galactocentric distancesdistances

Survey Statistics - Galactocentric Survey Statistics - Galactocentric distancesdistances

1414

Survey Statistics - Flux Survey Statistics - Flux distributiondistribution

Survey Statistics - Flux Survey Statistics - Flux distributiondistribution

MMBMMB

AreciboArecibo

1515

Excited OH ResultsExcited OH ResultsL.QuinnL.Quinn

Excited OH ResultsExcited OH ResultsL.QuinnL.Quinn

• Work in progress..Work in progress..• Work in progress..Work in progress..

1616

ATCA & MERLINATCA & MERLINATCA & MERLINATCA & MERLIN

• Positioning follow-up: Parkes positions Positioning follow-up: Parkes positions accurate to ± 30 arcsec. accurate to ± 30 arcsec.

• Capabilities to do it in both hemispheres Capabilities to do it in both hemispheres with ATCA and MERLIN:with ATCA and MERLIN:– ATCA ± 0.1 arcsecATCA ± 0.1 arcsec– MERLIN ± 0.01 arcsecMERLIN ± 0.01 arcsec

• ATCA observed and positioned all new ATCA observed and positioned all new detections.detections.

• MERLIN observed ~30 new in 20-30 MERLIN observed ~30 new in 20-30 region, positioned 25.region, positioned 25.

• Positioning follow-up: Parkes positions Positioning follow-up: Parkes positions accurate to ± 30 arcsec. accurate to ± 30 arcsec.

• Capabilities to do it in both hemispheres Capabilities to do it in both hemispheres with ATCA and MERLIN:with ATCA and MERLIN:– ATCA ± 0.1 arcsecATCA ± 0.1 arcsec– MERLIN ± 0.01 arcsecMERLIN ± 0.01 arcsec

• ATCA observed and positioned all new ATCA observed and positioned all new detections.detections.

• MERLIN observed ~30 new in 20-30 MERLIN observed ~30 new in 20-30 region, positioned 25.region, positioned 25.

1717

MERLIN Follow-up ExamplesMERLIN Follow-up ExamplesD. Wong-McSweeneyD. Wong-McSweeney

MERLIN Follow-up ExamplesMERLIN Follow-up ExamplesD. Wong-McSweeneyD. Wong-McSweeney

1818

Pulsar Survey PiggybackPulsar Survey PiggybackPulsar Survey PiggybackPulsar Survey Piggyback

• Deep integrations through pointed Deep integrations through pointed observations conducted as part of the pulsar observations conducted as part of the pulsar search program.search program.

• No Doppler tracking.No Doppler tracking.• Just Methanol 6668 MHz frequency.Just Methanol 6668 MHz frequency.• Correlator configured for 8 MHz over 4096 Correlator configured for 8 MHz over 4096

channels for 7 beams, 2 polarizations.channels for 7 beams, 2 polarizations.• Same spectral resolution, but over wider Same spectral resolution, but over wider

velocity range.velocity range.• Focused on Galactic Centre, but covering -60 Focused on Galactic Centre, but covering -60

< < ll < +45 (maximum +/- 0.5 in < +45 (maximum +/- 0.5 in bb).).

• Deep integrations through pointed Deep integrations through pointed observations conducted as part of the pulsar observations conducted as part of the pulsar search program.search program.

• No Doppler tracking.No Doppler tracking.• Just Methanol 6668 MHz frequency.Just Methanol 6668 MHz frequency.• Correlator configured for 8 MHz over 4096 Correlator configured for 8 MHz over 4096

channels for 7 beams, 2 polarizations.channels for 7 beams, 2 polarizations.• Same spectral resolution, but over wider Same spectral resolution, but over wider

velocity range.velocity range.• Focused on Galactic Centre, but covering -60 Focused on Galactic Centre, but covering -60

< < ll < +45 (maximum +/- 0.5 in < +45 (maximum +/- 0.5 in bb).).

1919

Magellanic CloudsMagellanic CloudsMagellanic CloudsMagellanic Clouds

• Slightly different technique.Slightly different technique.• Pointed MX observations as well.Pointed MX observations as well.• 1 new Methanol & 1 new excited 1 new Methanol & 1 new excited

OH.OH.

• Slightly different technique.Slightly different technique.• Pointed MX observations as well.Pointed MX observations as well.• 1 new Methanol & 1 new excited 1 new Methanol & 1 new excited

OH.OH.

2020

The Work Plan : 2007-The Work Plan : 2007-20112011

The Work Plan : 2007-The Work Plan : 2007-20112011

• Parkes Multibeam survey till 2008.Parkes Multibeam survey till 2008.• ATCA positions, snapshots and 8.4 GHz ATCA positions, snapshots and 8.4 GHz

continuum.continuum.• MERLIN positions and snapshots.MERLIN positions and snapshots.• Distances and Galactic Distribution.Distances and Galactic Distribution.• Jodrell Bank Multibeam survey 2008-2010.Jodrell Bank Multibeam survey 2008-2010.• MMB catalogue of Milky Way.MMB catalogue of Milky Way.• MMB survey of LMC/SMC.MMB survey of LMC/SMC.• Simultaneous survey of excited OH 6035 MHz.Simultaneous survey of excited OH 6035 MHz.• Methanol deep fields at Pulsar pointings.Methanol deep fields at Pulsar pointings.

• Parkes Multibeam survey till 2008.Parkes Multibeam survey till 2008.• ATCA positions, snapshots and 8.4 GHz ATCA positions, snapshots and 8.4 GHz

continuum.continuum.• MERLIN positions and snapshots.MERLIN positions and snapshots.• Distances and Galactic Distribution.Distances and Galactic Distribution.• Jodrell Bank Multibeam survey 2008-2010.Jodrell Bank Multibeam survey 2008-2010.• MMB catalogue of Milky Way.MMB catalogue of Milky Way.• MMB survey of LMC/SMC.MMB survey of LMC/SMC.• Simultaneous survey of excited OH 6035 MHz.Simultaneous survey of excited OH 6035 MHz.• Methanol deep fields at Pulsar pointings.Methanol deep fields at Pulsar pointings.

2121

MMB-CORNISH OverlapMMB-CORNISH OverlapMMB-CORNISH OverlapMMB-CORNISH Overlap

2222

-1.00

-0.50

0.00

0.50

1.00

10.015.020.025.030.035.040.045.050.055.060.0

Longitude

Latitude

New

Known

MMB-CORNISH MMB-CORNISH COINCIDENCESCOINCIDENCESMMB-CORNISH MMB-CORNISH COINCIDENCESCOINCIDENCES

2323

MMB-CORNISH MMB-CORNISH COINCIDENCESCOINCIDENCESMMB-CORNISH MMB-CORNISH COINCIDENCESCOINCIDENCES

-0.850

-0.350

0.150

0.650

20.00022.00024.00026.00028.00030.00032.00034.000

Longitude

Latitude

MMB

CORNISH

2424

MMB-CORNISH MMB-CORNISH COINCIDENCESCOINCIDENCESMMB-CORNISH MMB-CORNISH COINCIDENCESCOINCIDENCES

-0.350

-0.250

-0.150

-0.050

0.050

0.150

0.250

0.350

0.450

22.00023.00024.00025.00026.00027.00028.00029.00030.00031.00032.000

Longitude

Latitude

MMB

CORNISH

2525

MMB-CORNISH MMB-CORNISH COINCIDENCESCOINCIDENCESMMB-CORNISH MMB-CORNISH COINCIDENCESCOINCIDENCES

-0.450

-0.350

-0.250

-0.150

-0.050

0.050

0.150

0.250

0.350

0.450

0.550

22.00023.00024.00025.00026.00027.00028.00029.00030.00031.00032.000

Longitude

Latitude

CORNISH

8 Jy

3 Jy

7.5 Jy

4 Jy

1.1 Jy

0.8 Jy

2.6 Jy

2.6 Jy

2626

ConclusionConclusionConclusionConclusion

• MMB first full Galactic plane survey.MMB first full Galactic plane survey.• 528 detections & counting528 detections & counting• MMB-CORNISH overlap looks very MMB-CORNISH overlap looks very

promising.promising.

• MMB first full Galactic plane survey.MMB first full Galactic plane survey.• 528 detections & counting528 detections & counting• MMB-CORNISH overlap looks very MMB-CORNISH overlap looks very

promising.promising.