Subject: Re: [sloan-25mlog 3516] 2.5m obslog 20170521 (SJD 57895)
From: Kaike Pan
Date: Mon, 22 May 2017 08:55:36 -0600
> On May 22, 2017, at 5:52 AM, elenam@apo.nmsu.edu wrote:
>=20
>=20
>                       APACHE POINT OBSERVATORY SDSS 2.5M
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>                                 OBSERVING LOG
>                          Sunday May 21, 2017
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>                                  (SJD 57895)
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> ----  Observing Team ----
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> Audrey Oravetz
> Elena Malanushenko
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> ---- Observing Summary ----
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> Clear night with bad seeing.  Closed for 40 minutes because of=20
> high humidity.  Manga lost 1:00 hour while we was closed, and=20
> re-started observations again.=20
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>=20
> Cart 6, plate 9876,MJ195.88382+27.53178=09
> 2xNSE + 6xAB (+2xAB twilight) - not done
> Missing fibers: [181, 277]
> Faint fibers:   [15, 34, 105, 168, 289, 294]
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> Cart 13 plate 8436, 9x900 - not done
> Cart 16 plate 8059, 1x900 - DONE=20
> Cart 17 plate 8528, 4x900 - not done
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> Cart 2, Plate 9126;
> APOGEE-2&MaNGA;  lead: APOGEE lead
> Name COROT2
> Twi observations: 2xAB+2C
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> Notes:
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> We switched to eBOSS 2 hours early, partly because MaNGA was not =
getting
> useful data since the seeing was between 2.5-3.5", but also to help
> payback the debt. 30 minutes after we switched, the seeing got a =
little
> better (between 2.0 - 2.5") and eBOSS collected usable data. We leave =
the
> decision whether to count this time towards the debt or not to the
> projects and/or Kaike.
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The first exposure after re-openning started at 6:20, switch time was at =
8:07. eBOSS
got 6.5 exposures with S/N on blue from 0.6 to 1.3, about 1/3 of that =
one could get
under perfect weather conditions. I suggest that we count a payback time =
of
50 minutes.=20