ObsTac name | hex_name | hex_ra | hex_dec | ra | dec
-------------+---------------+----------+-----------+-----------+----------
precam256_21 | SA_112-AB | -49.3670 | 0.0000 | -48.9670 | 0.4000
precam257_21 | SA_115-A | -4.4250 | 0.0000 | -4.0250 | 0.4000
precam258_21 | SA_94-A | 44.3880 | 0.0000 | 44.7880 | 0.4000
precam259_21 | 160100-300000 | 240.2500 | -30.0000 | 240.7100 | -29.6000
precam260_21 | 190000-300000 | 285.0000 | -30.0000 | 285.4600 | -29.6000
precam261_21 | 080000-300000 | 120.0000 | -30.0000 | 120.4600 | -29.6000
precam262_21 | 100000-300000 | 150.0000 | -30.0000 | 150.4600 | -29.6000
precam263_21 | NGC_1841 | 71.2500 | -84.0000 | 74.8384 | -83.6000
precam264_21 | Ross711 | 278.8299 | 28.7000 | 279.2877 | 29.1000
precam265_21 | BD+21o607 | 63.6459 | 22.3525 | 64.0797 | 22.7525
precam266_21 | LHS-1858 | 99.2988 | 17.5631 | 99.7193 | 17.9631
precam267_21 | Ross374 | 51.7477 | 23.7783 | 52.1862 | 24.1783
precam268_21 | BD+25o1981 | 131.1035 | 24.7981 | 131.5456 | 25.1981
precam269_21 | BD+21o910 | 68.3177 | -21.1344 | 68.7454 | -20.7344
precam270_21 | 92_342 | 13.7912 | 0.7203 | 14.1913 | 1.1203
The ObsTac name nomenclature is precamHHH_TT, where HHH is the hex id and TT is the tiling number.
hex_ra and hex_dec are where the center of the field is supposed to be. ra and dec are where obstac requests that the telescope point. For tiling 21, there is a +0.4deg offset in both the ra and dec direction from the hex_ra, hex_dec. This offset is used in order to avoid the gap between the 2 CCDs. Currently, standard stars are always observed as tiling 21.