CASB Report
September, 2001
·
Essentially finished migration of DSS1 and DQVS from CDROM
to online RAID array. Access to these
compressed sky surveys, which support HST Phase2 operations, will soon be more
reliable.
·
Laidler and White submitted a paper for inclusion in
the proceedings of the Statistical Challenges in Modern Astronomy III
conference, to be published by Springer-Verlag. The text contains highlights of
the poster presented by Laidler at this conference in July.
· Morrison worked with Smart on an astrometry paper, describing the astrometry calibration method for the GSC II catalog and focusing on the GSC 2.2 release. Also they worked on the reporting the astrometric quality of the GSC 2.2 catalog. This is an on going project.
· Continued planning for the 7th annual GSC-II meeting, scheduled during the week of October 22, 2001 at OATo.
·
Wil O’Mullane
visited September 17 - 29. His main
objective this time was to integrate SDSS, which is done but may be
improved. His secondary objective was
to fix some bugs and make enhancements to ShowSky and ShowFullSky.
·
As of 1 October, Mike Asbury will no longer be working
on the APT/VTT Bright Object Tool project.
· Laidler attended a two-day seminar on Statistical Learning and Data Mining, taught by Hastie and Tibshirani.
·
Moved the scanning test system (PIXEL 0) and the
optical bench from the engineering lab to the plate vault. Some reorganization will be necessary to
accommodate the new equipment, but ample room exits.
·
McLean and Greene continued supporting SDSS planning
activities.
· Reviewed nine Guide Star Problem Reports (GSPRs) this period. One GSPR was an initial acquisition failure due to a spoiler star too faint to be in GSC-I. Another was a search failure due to a blended pair of stars misclassified as a brighter, single star in GSC-I. The other GSPRs were fine lock failures. Filed a Bad GS Alert for each of the GSs.
· Completing work on the APT/VTT Bright Object Tool. The next release will be in December. All but one OPR is fixed for this release.
· Still in the process of laying out plans to port the GetImage software to the Windows NT server.
·
· Continued scanning UKST-IR plates. Nearly 80% of the current shipment has been scanned.
·
Continued
compressing scans of the POSSII-N survey.
·
Continued
compressing scans of the POSSI-O survey.
·
Essentially finished migration of DSS1 from CDROM to online
RAID arrays. The DSS1 is complete except for CDROM disk 100 and a technical
problem. The DQVS is 100% copied. DSS1
and DQVS support HST Phase2 operations.
· Beginning the migration of the red XDSS from CDROM.
· Worked on four archive help desk requests for help/information.
· Continued low-level rationalization of MOD archive.
·
Completed all database
moves to take advantage of the enhanced disk array in the COMPASS database
server. All 32768 databases were
re-registered with the objectivity database and more then half the files
required disk-to-disk transfer. The new
database organization insures the maximum efficiency of space available. A simple counting task was run to sample all
the databases and provided confirmation that all the data moves were
successfully registered with the objectivity database. Database tasks will
resume on a production level in about a week.
·
Have begun to recompile
and rebuild the COMPASS database software tasks on an as needed basis.
·
Resumed the task of
identifying and planning fixes in regions of sub-optimal export data. (For example, these regions may include poor
photometry for very faint stars or a few multiple entries from overlapping
plates that were not matched.) The problems can be due to a number of
processing, software and calibration errors.
The sub-optimal data affects a small percentage (order of 1 % or less)
of the database and in most cases does not present significant problems for the
operational use of the catalog, but could be of minor concern for statistical
and scientific use of GSC-II.
· Morrison worked on the magnitude dependence of the GSC II positions and has written a series of programs to quantify this effect. The steps involve comparing the SPM catalog to the GSC II database on a plate-by-plate basis.
· This approach was taken because the GSC 2.2 export catalog decreases the amplitude of the magnitude dependence due to the method used to pick the positions. This is good for users of the GSC 2.2 catalog, but the effect still exists in the positions and must be removed before accurate proper motions can be determined.
· Therefore the above set of programs compares positions in the SPM catalog with those from all the GSC II plates that overlap the SPM. The results are binned into a 3-d mask: xi, eta, magnitude space. Also, the results are binned into radial bins and magnitude.
· These programs have been tested using the TESTFDB and the results look promising except there are not enough plates contained in the TESTFDB for really useful information. This work will be run soon on FDB on COMPASS.
· During Smart’s visit from OATo, a more detailed approach for describing the GSC2.2 classification performance was designed for use in the GSC2.2 paper. This Bayesian formulation will permit a sophisticated user to perform a statistical error analysis that accounts for variations in the star/galaxy populations when different samples are studied.
CALIBRATIONS: Photometry
(GSPC-II and DSS-I and -II)
·
We have
performed extensive analysis of GSC2.2 data by comparing the observed counts of
the POSS-II plates located at intermediate and high galactic latitudes
(|b|>+25 deg) against the starcounts predicted by the Mendez model extended
to the J385 and F610 filters. These
comparisons show a quite good agreement (better towards higher latitudes) and
also reveal the presence of fields affected by problems with the photometric
calibration and classification.
Survey |
Goal |
Previous Month |
Current Month |
Current Total |
% done |
Notes
|
Priority |
|
POSS-II
J |
897 |
902 |
0 |
902 |
100 |
S4 |
1 |
|
POSS-II
F |
897 |
910 |
0 |
910 |
100 |
S4 |
1 |
|
POSS-II
N |
897 |
880 |
0 |
880 |
98 |
S4 |
1 |
|
AAO-SES |
606 |
614 |
0 |
614 |
100 |
S4 |
1 |
|
PPARC-ER |
288 |
288 |
0 |
288 |
100 |
|
1 |
|
AAO-SR |
118 |
118 |
0 |
118 |
100 |
S2 |
- |
|
UKST-SR
|
112 |
50 |
0 |
50 |
45 |
S5 |
3 |
|
UKST-IR |
894 |
733 |
35 |
768 |
86 |
S6 |
2 |
|
SERC-J/EJ |
447 |
443 |
0 |
443 |
99 |
S1 |
2 |
|
POSS-I
E |
106 |
106 |
0 |
106 |
100 |
S3 |
3 |
|
POSS-I
O |
936 |
354 |
5 |
359 |
38 |
|
3 |
|
Rescans |
|
34 |
0 |
34 |
|
|
|
|
Survey |
Goal |
Previous Month |
Current Month |
Current Total |
% done |
Notes
|
Priority |
POSS-II
J |
897 |
895 |
0 |
897 |
100 |
|
2 |
POSS-II
F |
897 |
897 |
0 |
897 |
100 |
|
1 |
POSS-II
N |
897 |
720 |
28 |
748 |
83 |
|
3 |
AAO
SES |
606 |
606 |
0 |
606 |
100 |
|
1 |
PPARC
ER |
288 |
288 |
0 |
288 |
100 |
|
1 |
AAO-SR |
118 |
118 |
0 |
118 |
100 |
|
3 |
UKST-IR |
894 |
697 |
0 |
697 |
78 |
|
3 |
POSS-I
O |
936 |
48 |
46 |
94 |
10 |
|
3 |
Survey |
Goal |
Previous Month |
Current Month |
Current Total |
% done |
Notes
|
Priority |
POSS-II
J |
897 |
902 |
0 |
902 |
100 |
|
4 |
POSS-II
F |
897 |
900 |
0 |
900 |
100 |
|
3 |
POSS-II
N |
897 |
833 |
0 |
833 |
93 |
|
4 |
AAO-SES |
606 |
613 |
0 |
613 |
100 |
|
3 |
PPARC-ER |
288 |
288 |
0 |
288 |
100 |
|
3 |
AAO-SR |
109 |
116 |
0 |
116 |
100 |
|
4 |
UKST-IR |
894 |
697 |
0 |
697 |
78 |
|
5 |
SERC-J/EJ |
894 |
892 |
0 |
892 |
100 |
|
|
SERC-J/REPAIR |
48 |
48 |
0 |
48 |
100 |
|
|
SERC-J/15mu |
449 |
449 |
0 |
449 |
100 |
|
5 |
POSS-I
E |
933 |
928 |
0 |
928 |
99 |
|
2 |
POSS-I
REPAIR |
198 |
198 |
0 |
198 |
100 |
|
2 |
POSS-I
O |
936 |
70 |
30 |
100 |
7 |
|
5 |
POSS-QV |
613 |
613 |
0 |
613 |
100 |
|
- |
SERC-QV |
94 |
94 |
0 |
94 |
100 |
|
- |
GPO/BB |
88 |
88 |
0 |
88 |
100 |
|
- |
|
|
|
|
|
|
|
|
GSC-II PLATE PROCESSING
Survey |
Goal |
Previous Month |
Current Month |
Current Total |
% done |
Notes
|
Priority |
POSS-I
E |
936 |
931 |
0 |
931 |
99 |
|
3 |
POSS-QV |
613 |
2 |
0 |
2 |
0 |
|
3 |
POSS-II
J |
897 |
897 |
0 |
897 |
100 |
|
1 |
POSS-II
F |
897 |
897 |
0 |
897 |
100 |
|
1 |
POSS-II
N |
897 |
308 |
0 |
308 |
34 |
|
4 |
SERC-J/EJ |
894 |
829 |
0 |
829 |
93 |
|
1 |
South-F |
894 |
894 |
0 |
894 |
100 |
|
1 |
UKST-IR |
894 |
234 |
158 |
392 |
44 |
|
4 |
South-SR |
116 |
116 |
0 |
116 |
100 |
|
2 |
South-QV |
94 |
94 |
0 |
94 |
100 |
|
2 |
POSS-I
O |
936 |
0 |
15 |
15 |
2 |
|
5 |
GSC-II COMPASS DATABASE LOAD (no.objects = 998,402,801)
Survey |
Goal |
Previous Month |
Current Month |
Current Total |
% done |
Notes
|
Priority |
POSS-I
E |
936 |
23 |
0 |
23 |
2 |
|
3 |
POSS-QV |
613 |
2 |
0 |
2 |
0 |
|
3 |
POSS-II
J |
897 |
897 |
0 |
897 |
100 |
|
1 |
POSS-II
F |
897 |
899 |
0 |
899 |
100 |
|
1 |
POSS-II
N |
897 |
27 |
0 |
27 |
3 |
|
4 |
SERC-J |
894 |
709 |
0 |
709 |
79 |
|
1 |
South-F |
894 |
742 |
0 |
742 |
83 |
|
1 |
UKST-IR |
894 |
2 |
0 |
2 |
0 |
|
4 |
South-SR |
116 |
116 |
0 |
116 |
100 |
|
2 |
South-QV |
94 |
90 |
0 |
90 |
96 |
|
2 |
GSPC-II OBSERVATIONS
Survey |
Goal |
Previous Month |
Current Month |
Current Total |
% done |
Notes
|
Priority |
POSS-I |
584 |
603 |
0 |
603 |
100 |
P1 |
1 |
POSS-II |
314 |
271 |
0 |
271 |
86 |
|
1 |
SERC |
894 |
889 |
0 |
889 |
99 |
|
1 |
GSPC-II REDUCTIONS
Survey |
Goal |
Previous Month |
Current Month |
Current Total |
% done |
Notes
|
Priority |
POSS-I |
584 |
603 |
0 |
603 |
100 |
P1 |
1 |
POSS-II |
314 |
271 |
0 |
271 |
86 |
|
1 |
SERC |
894 |
905 |
0 |
905 |
100 |
|
1 |