Chandra Cycle 9
# Proposals per Cycle
900
800
90
700
80
600
All proposals
70
Number
 661 submitted proposals
 *5.5 oversubscribed
(based on time)
48 LP, 10 VLP
Fewer LPs cf Cycle 8 (72)
 52 Archive, 42 Theory
GO
500
LP
60
50
VLP
400
LP
ArchiveVLP
40
300
30
200
20
100
TheoryArchive
Theory
10
0
1
0
1
Director's Office
2
2
3
3
4
5
4 Cycle
5
6
7
6
8
7
9
8
9
Chandra Users’ Committee, 19-20 Sept 2007
Total Time Request
 Change from Cycle 8
Oversubscription in Time
 Time request down: 9%
 LP request down 35%
 VLP request up 35%
8
7
6
5
4
3
2
1
Time Requested per Cycle
0
Time Request (ksecs)
1
120000
2
3
4
5
6
7
8
9
Cycle
100000
80000
60000
40000
20000
0
1
2
3
4
5
6
7
8
9
Cycle
Director's Office
Chandra Users’ Committee, 19-20 Sept 2007
Oversubscription by Category
 LP now closer to other categories
Oversubscription by Category
12
Oversubscription Ratio
10
8
Archive
Theory
LP
VLP
GO
6
4
2
0
1
2
3
4
5
6
7
8
9
Cycle
Director's Office
Chandra Users’ Committee, 19-20 Sept 2007
Time Allocated
per Instrument
HRC-S
0%
HRC-S/LETG
2%
HRC-I
1%
ACIS-I
42%
ACIS-S
47%
ACIS-S/LETG
0%
ACIS-S/HETG
8%
b
Director's Office
Chandra Users’ Committee, 19-20 Sept 2007
Results by Science Category
Effective Oversubscription in Time
Surveys: Glc
Surveys: Eglc
Clusters
AGN
Gals: Poplns
Gals: Diffuse
SN, SNR
BH&NS Binrs
WD Binrs & CV
Stars & WD
Solar System
0
Director's Office
1
2
3
4
5
6
7
8
9
10
Chandra Users’ Committee, 19-20 Sept 2007
Grating Observations Statistics
Over-subscription
10
8
6
4
2
0
Total
HETG
LETG
1
2
3
4
5
6
7
8
9
Cycle
Grating Time Request
30000
25000
Time
Ratio
• Oversubscription in
grating time is constant
until Cycle 9 when HETG
success rate decreased
substantially
•Grating time request is
fairly constant, but in
Cycle 9 the LETG request
was substantially lower
20000
TOTAL
15000
HETG
10000
LETG
5000
0
1
2
3
4
5
6
7
8
9
Cycle
Director's Office
Chandra Users’ Committee, 19-20 Sept 2007
Joint Chandra Proposals to other
Observatories
 Joint Proposals
 XMM TAC: 3 (of 17) approved: 180 ksec
 HST TAC: 3 (of 12) approved: 85 ksec
 Spitzer: 2 (of 8) approved: 180 ksec
Director's Office
Chandra Users’ Committee, 19-20 Sept 2007
Peer Review
 18-22 June 2007, Hilton, Logan Airport
 12 topical panels, 1 Big Project Panel (BPP)
 Program:
 Tues, Wed: Topical panels
 Thurs, Frid: BPP
 Changes from last year:
 Constrained Observations (next slide)
 Formal list of conflicts and their resolution:
 Web page for each panel
 Pre-loaded with known conflicts
 Edited by deputy chair for additional conflicts
and mitigation at review
 Worked well
Director's Office
Chandra Users’ Committee, 19-20 Sept 2007
Constrained Observations
• Categories: Easy, Average, Difficult
• Allocations:
• 45, 35, 20
• based on previous distribution of constraints
• Allocation at review: 32, 35, 15
• Requests:
345, 47, 52
• Oversubscription ratio:
Easy: 11; Average: 1.3, Difficult: 3.5
• Results:
• Combined average and easy in accounting
• Final allocation: 15 (of 15) difficult
72 (of 67) easy+aver.
• Next year: review allocations+classes
Director's Office
Chandra Users’ Committee, 19-20 Sept 2007
Archive and Theory Proposals
• Survey of Archive and Theory PIs
• Sent: 10 Aug 2007 to 122 PIs
• Due date: 14 Sept 2007
• Aim:
– Enhance publication tracking
– Assess adequacy of funding levels
– Learn about alternate funding being used
• Responses:
– 49 to date
– Diverse responses on funding levels
– Full Report next meeting
Director's Office
Chandra Users’ Committee, 19-20 Sept 2007
Archive and Theory Budgets
• Theory: 5% of GO budget (NASA mandated)
• Archive: about 10% of budget
• Cycle 9 GO Budget: $10.6M (w/o DDT, E/PO)
• GO: $9M
• Archive: $1M (Allocated $1.1M)
• Theory: $0.6M (Allocated $0.7M)
• Passing Grade: generally higher than GO
• Grants (Cycle 9):
• 17 archive: $40-127K
• 12 theory: $40-80K
• Levels similar to GO proposals (not LP/VLP)
• Oversubscription: lower than GO
Director's Office
Chandra Users’ Committee, 19-20 Sept 2007
Oversubscsription for Archive+Theory
Oversubscription
7
6
5
4
Archive
Theory
3
2
1
0
3
4
5
6
7
8
9
Proposal Cycle
Director's Office
Chandra Users’ Committee, 19-20 Sept 2007
NASA: ADP
• Unlikely to have major impact on our
archive program
• $2.5M budget, only 2.5 times our archive
• Specifically rules out primarily Chandra
research
• 33 missions cited in list (w/o Great Obs)
• Requires that < a third of data is from any
one Great Observatory
Director's Office
Chandra Users’ Committee, 19-20 Sept 2007
Responses to CUC Actions
• LP/VLP time: options discussed by Harvey
• Chandra Source Catalog: to be discussed
Ian Evans
• Archival Project Funding: discussed by me
• Chandra Long-term Future Science:
• 8 years conference is 23-25 Oct..
• Speakers have been asked to address this topic.
Director's Office
Chandra Users’ Committee, 19-20 Sept 2007
Alpha Cen. Chandra Data
•Position of stars good to 0.17"
•<< 0.6" advertised
Center
of Mass
Director's Office
Error * 10
Courtesy Tom Ayres
Chandra Users’ Committee, 19-20 Sept 2007