From hlm@ipac.caltech.edu Thu Feb 28 15:06:33 2002 Date: Fri, 22 Feb 2002 15:55:40 -0800 From: Howard McCallon To: davy@ipac.caltech.edu Cc: hlm@ipac.caltech.edu, roc@ipac.caltech.edu Subject: avoid using if possible Davy- Here's the list of scans to avoid using in the catalog, if possible, for astrometric reasons. There are 33 scans on the list, three of which are included because of RA slippage at the telescope (970917n045, 970917n049 and 970616n020). The remaining 30 scans have significant reconstruction problems of one kind or another. Some scans have been added to the list even though their maximum errors do not exceed 0.5 asec, because their errors average more than half that value. This list includes all but two of the 13 scans which fell back to USNOA as the reference catalog. The two USNOA scans not included are 000605s048 and 000622s040. If one wanted to avoid USNOA scans on general principles, these two would need to be added to the list. Regards, Howard %%%%%%%%%%%%%%% 000112n155 000119s014 000130n045 000223s020 000308s050 000603s046 000603s153 000605s044 000725s096 000913n030 000925n029 000925n030 000925s138 001001n009 001022s070 970616n020 970917n045 970917n049 980109n166 980202n117 980224n106 980310n095 980319s124 980501n053 980502n012 980927s042 981024s045 981121n069 981231s109 990526n014 990527n018 991015n021 991016n029