CASB Report June, 2001

 

Highlights for Division Meeting

·         Public release of GSC 2.2 announced at the AAS meeting along with supporting press release.

 

Community Affairs and Communications

·         McLean and Asbury attended the AAS meeting in support of the GSC 2.2 public release, the Sloan EDR and the APT.

·         Laidler attended the 2001 annual meeting of the Classification Society of North America, and presented a talk on “Canaries in the Data Mine”, based on the classification work with imprinting.

·         Copies of GSC 2.2.0 sent to GEMINI (North and South), ESO, CDS and CADC in addition to OATo.

 

Project Management and Technical Infrastructure

·         McLean and Greene continued supporting SDSS planning activities.

 

MISSION SUPPORT

HST Operations

·         Reviewed four Guide Star Problem Reports (GSPRs) this period.  Three GSPRs were fine lock failures. The other one was a search failure due to a compact group of objects that was misclassified in GSC-I.   Filed a Bad GS Alert for each of the GSs.

·         The GSPRs this month brought the total number to 500.  Of these, 353 or over 70 percent, were fine lock failures usually with poor S curves due to close binaries.  Some 117 GSPRs were search failures or faint objects, often due to classification errors.  The rest are miscellaneous failures including high proper motions, spoilers, bad GSC photometry, and inconsistent acquisitions.  Note, that HST typically uses over 3,000 unique GSs from GSC-I every year.

·         In mid-June, released a version of the Visual Target Tuner (VTT) with the Bright Object Tool, for use by PI's.  This version uses the latest version of the GSC 2.2 with both an F and a J magnitude, with no magnitude selection, and with Tycho 2 entries for bright objects.

 
NGST Development Studies

·          

 

DIGITIZED SKY SURVEY

Plate Scanning

·         Completed scanning the current shipment of UKST-IR plates on GAMMA1. Tests are underway to insure the integrity of the current scans prior to return of the shipment to ROE.

 

GAMMA Microdensitometer Systems

·         Intermittent problems of unknown origin continue to plague GAMMA2. Testing of electronic components continues.  So far the primary suspected component(s) have been the HP Laser position transducer and the counters (fifo, ppg), but the complicated interdependent nature of the electronic components has made isolating the intermittent failures difficult.  No production scans are currently being performed on GAMMA2.

 

Data Compression/CD Production

·         Continued compressing scans of the POSSII-N survey.

·         Started compressing scans of the AAO Short-Red survey.

 

Archive Maintenance

·         Worked on three archive help desk requests for help/information.

·         Continued low-level rationalization of MOD archive.

 

GSC-II

 

Plate Processing and COMPASS Database

·         Continued processing POSSII-N and UKST-IR plates.

·         Continued to assess and fix problem areas in GSC 2.2. Successfully re-loaded and matched several more of the very crowded southern regions as well as many individual database regions that showed unusual statistical properties.  Continued to focus on the beta version of the full (no magnitude selection) of GSC 2.2 (GSC2.2.1).

·         Counts were generated for GSC 2.2.1 showing 938,862,694 unique objects with 596,621,454 red and blue matches as well as 65,494,534 red and visual matches coming from the short exposure plates from the galactic plane surveys.  The matching ratios for each database region for the uncut catalog show excellent results for the matching and are very strongly peaked at the 60 % to 70 % range.  This has aided in the quick detection of gross problem areas in the catalog.

·          Began a new complete export of both GSC 2.2 and GSC 2.2.1 in order to pick up all the fixes and to replace data from the reported and known bugs.

·         Continued to maintain a web page containing known bugs and limitations of the GSC2.2.

 

CALIBRATIONS: General

 

 

CALIBRATIONS: Astrometry

·         Continued a study on a magnitude dependent systematic error in the GSC 2.2 positions. This study compares the position in the GSC 2.2 (GSC 2.1) with those in the SPM, NPM, USNO A and 2MASS catalogs.

 

CALIBRATIONS: Classification

·         Continued modifications to VERCLASS, the versatile classification task presently in development. Significant activities this month include:

-          the use of the imprinting technique to assign an indication of extrapolation to the

-          classification;

-          the ability to read the set of classification features to be used from a table in the decision  tree FITS file;

-          the ability to selectively classify only those objects which satisfy criteria associated with the decision tree, as stored in FITS keywords.

·         Experiments using the imprinting technique clearly indicate that deblended  “child” objects do not occupy the same parts of parameter space as single objects. This confirms previous suspicions that separate training sets and decision trees are needed for more reliable classification of “child” objects.

 

CALIBRATIONS: Photometry (GSPC-II and DSS-I and -II)

·         The third JKT/La Palma run (10 nights, ending July 3) of semester 01A is in progress. G. Massone, the observer, has reported successful nights up to now.

·         Allocated 7 nights CTIO time in December 2001

 

GSC-II Science 

·         McLean had observing run at APO 3.5m to observe high proper motion halo white dwarf candidates found from GSC2 data.


 

Appendix – CASB Statistical Summary

 

SCANNING                                                                                                                                                                         

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

674

16

690

77

 

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

301

6

307

33

 

3

Rescans

 

34

0

34

 

 

 

 

COMPRESSION

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

617

28

645

72

 

3

AAO SES

606

606

0

606

100

 

1

PPARC ER

288

288

0

288

100

 

1

AAO-SR

118

90

28

118

100

 

3

UKST-IR

894

658

16

674

75

 

3

 


 

 

 

MO DISK ARCHIVING

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

823

0

823

92

 

           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

658

0

658

74

 

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-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

131

0

131

15

 

4

SERC-J/EJ 

     894

829

0

829

93

 

1

South-F

894

894

0

894

100

 

1

UKST-IR

894

72

0

72

8

 

4

South-SR

116

116

0

116

100

 

2

South-QV

94

94

0

94

100

 

2

 

 

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

 


 

 

 

 

GSC-II Dataset for V2.2.n delivery (1791 Fields, 3438 plates)   (P1)

Item

Count

% done

Notes

Plates available

3438

100

 

Plates processed

3438

100

 

DB Load

3438

100

 

Fields, minus the 72 southern equatorial fields, with 1644 plates.

 

GSPC-II OBSERVATIONS

Survey

Goal

Previous Month

Current Month

Current Total

% done

Notes

Priority

POSS-I

584

561

10

571

98

P1

1

POSS-II

314

171

42

213

68

 

1

SERC

894

868

16

884

99

 

1

 

GSPC-II REDUCTIONS

Survey

Goal

Previous Month

Current Month

Current Total

% done

Notes

Priority

POSS-I

584

563

8

571

98

P1

1

POSS-II

314

175

0

175

56

 

1

SERC

894

884

17

901

100

 

1