Transcript www.atnf.csiro.au

Compact Array
March - October 2000
Australia Telescope Compact Array
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OPERATIONAL CHART
ATNF NARRABRI PAUL WILD OBSERVATORY
Compact Array & Mopra
OFFICER-IN-CHARGE
PA - J Houldsworth
D McConnell
R Beresford (Deputy OIC)
R Subrahmanyan 1
R Wark
Administration
K Forbes
D Harris
2
A Reynolds
Antenna &
Site Services
Computing
M Wieringa
C Murphy
2
(vacant)
S Cunningham
J Giovannis
D Campbell
O Dowd
T Gordon
B Johnson
C Leven
A Ryan 3
G Sunderland
4
5
Electronics
Library
Lodge
Visitors Centre
B Reddall
J Wieringa
C Forbes
T Kennedy
R Behrendt
D Brooke
A Day
S James
J McFee
L Panton 3
C Harvey
0.2
1
M Guest 6
M Rees
C Wilson
Other
S Tingay 4
A Deshpande 5
2
2.4
8
8
31.6
23 October 2000
1
2
3
25% AMIBA
30% AIPS++
Apprentice 6 Weekends
4
5
Bolton Fellow
Visiting Scientist
2
Array usage 00MAYT
Dow n Time
2%
Observing
76%
Maintenance
15%
Configuration
5%
Unallocated
2%
Australia Telescope Compact Array
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ATCA usage
100%
90%
80%
70%
Unallocated
60%
Configuration
50%
Down Time
Maintenance
40%
Remote
Observing
30%
20%
10%
0%
99SEP
00JAN
00MAY
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ATCA lost time 00MayT
Operator
Total = 79h
Receiver
Correlator
Comms
misc
Electronics
ACC
Power
Drives
Cryogenics
Encoders
Misc
Weather
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ATCA lost time by term
300.0
250.0
Weather
200.0
Operations
Power
Antenna drives
Antenna computers
150.0
Receiver systems
Correlator system
100.0
Other equip
50.0
0.0
99Sep
00Jan
00May
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User feedback
OBSERVING SUPPORT
Duty Astronomer
Observatory Staff
Observatory Staff (After hours)
DOCUMENTATION
ATCA Users' Guide
On-line help
Calibrator information
TECHNICAL SERVICES
Imaging Facilities (AIPS etc)
On-line processing
Vaxes
UNIX Computers
PCs
Library
OTHER (Remote Observing) Tie Line
Marsfield Services
Marsfield Staff
Remote Observing Web Page
98May-Nov
Nov 98-Mar 99
99Mar-Sep
99Oct-00Feb 00Mar-00Sep
4.9
5
4.9
4.2
4.3
4.8
4.8
4.7
4.1
4.2
4.3
4.5
4.2
4.2
4.6
4.4
4.8
3.5
4.3
4.4
4.5
4.8
5.0
4.8
4.7
4.8
4.0
4.0
3.2
4.3
3.6
3.7
4.3
4.1
4.3
5.0
5
4.9
4.9
4.9
4.2
4.5
5.0
3.6
5.0
4.2
4.6
4.2
5.0
4.2
4.8
4.8
5.0
4.5
4.3
4.5
4.9
4.9
4.1
4.4
4.8
4.2
4.7
4.0
4.5
4.2
4.9
4.5
N/A
5.0
4.0
22 responses (20 local + 2 remote)
5 DA questionnaires received
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00OctT Schedule

Arrays
»
»
»
»
»
6A (from 00MAYT)
6C
1.5B (W163, W182, W111, W113, W195, W392)  (3 4 1 2 5 6)
1.5C
750D
Installation/Maint shutdown 27 Nov - 8 Dec
 Term continues until 8 January 2001

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Mopra
Operation & Support

Narrabri :
» Antenna mechanical, drives, cm- receivers
» Antenna computer, monitoring, site and lodge
» Parts of observing computer and software

Marsfield :
» 3mm receiver (including tuning)
» Other parts of observing computers and software
» TCS (similar to Parkes)
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Operational issues
Automated Override




-ray Burst follow-up
Indications of prompt optical
Is there a radio counterpart?
GCN (GRB Coordinates Network)
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GCN
ATCA interface

TITLE:
BACODINE BURST POSITION NOTICE
NOTICE_DATE:
Fri 12 May 00 17:44:22 UT
NOTICE_TYPE:
Original
TRIGGER_NUM:
-1
GRB_RA:
-0.00d {-00h 00m 00s} (J2000),
Notification received
on dedicated socket
0.00d {+00h 00m 00s} (current),
We subscribe to GCN-filtered notices
-0.64d {-00h 02m 34s} (1950)
+35.00d {+34d 59' 53"} (J2000),
Further filtering atGRB_DEC:
ATCA :
+35.00d {+35d 00' 00"} (current),
» Position:
must be above +34.72d
CA horizon{+34d 43' 11"} (1950)
» Position error: GRB_ERROR:
within primary beam
1.0 [deg radius, statistical only]
GRB_INTEN:
1000 [cnts]
Peak=1000 [cnts/sec]
Schedule file written
GRB_TIME:
63809.91 SOD {17:43:29.91} UT
CAOBS commanded
with
new
schedule
GRB_DATE:
11676 TJD;
133 DOY;
00/05/12

Software works - not enabled at present
At Narrabri:
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Service Observing (1)
We currently allow two modes of observing:
 Observer travels to Narrabri and does
observing
 (In some cases) expert observer observes
remotely from within Australia
There is a de facto third mode:
 You get a friend/collaborator/student to do
the observing for you
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Service Observing (2)
We have received requests from some users for a
fourth mode:
 User pays someone to do the observing for them
If there was sufficient support and interest in this
mode, we could perhaps offer this as a parttime/casual job to astronomy students, or to
employ someone at a postdoc level.
Question to ATUC: how would you feel about setting
up this mode.
Australia Telescope Compact Array
(NB: AAO already
does something like it)
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Remote Observing

REMOBS - Pros
» save travel costs
» save time

REMOBS - Cons
» decreased Astronomer/Observatory interaction
» operational load on Narrabri staff & Duty Astronomer
» reliant on WAN - not always reliable

REMOBS restrictions
»
»
»
»
< 20% total
< 30% in any week
from authorised Australian sites only
by experienced observers only
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Remote Observing
Charge for remote access?
 Would need to define support level
 How much?

For a 12 hour observation:
•ATCA “share” of ATNF budget
•Observatory budget
($2.9M pa)
•Observing support
(CSO4M)
•(Sydney/Narrabri return
$10000
$4000
$650
$460)
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Connell-Wagner report on moving Ant 6
 Open Day on 16 April
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ATCA Pulsar Backend
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PSR J0437-4715
Tied array - 5 antennas
1420 MHz
64MHz bandwidth
1 polarisation
1000s integration
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Australia Telescope Compact Array
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