Subject: Re: [sloan-25mlog 6559] 2.5m obslog 20230125 (SJD 59970)
From: John
Date: Thu, 26 Jan 2023 11:54:36 -0700
> On Jan 26, 2023, at 6:22 AM, dmbiz@apo.nmsu.edu wrote:
>=20
>=20
>                       APACHE POINT OBSERVATORY SDSS 2.5M
>=20
>                                 OBSERVING LOG
>                          Wednesday January 25, 2023
>=20
>                                  (SJD 59970)
>=20
>=20
>=20
> The first set of dome flats shows low throughput in the MTPs 6 and 7:
>=20
> MJD    DomeFlat    MTPs: 1    2    3     4    5    6    7    8    9   =
10   AZ   ALT    ROT
> 59970 apq-44080010.fits 1.01 1.03 1.05 1.05 1.05 0.60 0.42 1.01 0.99 =
0.97 121.0 30.0   0.0
> 59970 apq-44080011.fits 1.03 1.03 1.05 1.04 1.04 0.59 0.42 1.01 0.99 =
0.96 121.0 30.0   0.0
> 59970 apq-44080012.fits 1.04 1.03 1.05 1.04 1.04 0.59 0.41 1.01 0.99 =
0.96 121.0 30.0   0.0
>=20
> I disconnected the gang connector, blowed it, and reseated back, and =
took 3 more dome flats
> 59970 apq-44080013.fits 1.01 1.01 1.04 1.03 1.03 0.98 0.97 1.00 0.98 =
0.95  60.0 60.0  60.0
> 59970 apq-44080014.fits 1.01 1.01 1.03 1.02 1.03 0.98 0.96 1.00 0.98 =
0.95  60.0 60.0  60.0
> 59970 apq-44080015.fits 1.02 1.01 1.04 1.02 1.03 0.97 0.96 1.00 0.98 =
0.95  60.0 60.0  60.0
>=20
> Now all MTPs look good!
It=E2=80=99s unfortunate, but it looks like this is what will be =
required on the dome flat side of things. =20
Plug, test, clean, re-test
On the good side however, at least it is just once per night instead of =
once per cartridge.=