Subject: Re: [sdss3-25mlog 711] 2.5m obslog 20120605 (MJD 56084)
From: Kaike Pan
Date: Wed, 6 Jun 2012 09:09:26 -0600
>=20
>=20
> 04:04:12  loadCart: ct=3D6, pl=3D5759,  sd=3DA; =20
> 04:04:39  sop.gotoField =3D running; =20
>=20
> No GS, FK5 is used with not success. We tried spiral pattern and
> all the time got 1-2 stars in different fibers. Finally, when we got =
stars to
> the field it seemed better to switch from this plate (priority 2) to =
the next
> one and catch all the rest of the nights with plates of priority 5 and =
higher.=20
>=20
> Science exposure that has been started was interrupted.=20
>=20
> 19 04:00 05220019  4 5626   Dark            A  10 None           =20
> 20 04:02 05220020  4 5626   Dark            A  10 None           =20
> 21 04:51 05220021  6 5759   Object          A  47 None  BAD
> 22 04:52 05220022  6 5759   DomeFlat        A   5 None           =20
> 23 04:56 05220023  6 5759   Dark            A  10 None           =20
> 24 04:57 05220024  6 5759   Dark            A  10 None           =20
>=20
>=20
   Because we are using calibs offsets. If there  are  bad fiducial =
crossing on one axis or fiducial correction
is not applied on one axis,  our pointing could be easily off  by more =
than 10". So If you are getting star
in previous plate not next one, play extra attention on fiducial =
crossing and correction.
   Which version of STUI were you using last night? If you were using b2 =
version, there should be "bad fiducial"
warning when fiducial correction is not applied on one crossing. b4 =
version STUI is not installed yet, b3 version=20
does not have warning voice. so If b4 version is not available, b2 is =
the better choice.
-kaike