Subject: Re: [sloan-25mlog 2372] 2.5m obslog 20150625 (SJD 57199)
From: Steve Majewski
Date: Fri, 26 Jun 2015 14:37:50 -0400
--Apple-Mail=_C724AA41-57D9-4F32-898E-900C101CC53C
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
	charset=windows-1252
Ok, didn=92t realize that things were so hardwired.  I think it is worth =
opening the discussion of options.  One option might be to just have AB =
paired APOGEE exposures scale down proportionately to whatever the MaNGA =
exposures are.  This is probably simplest thing to implement, no?
More complex would be allowing APOGEE exposures to span through the =
MaNGA dithers.  I=92m not sure that the APOGEE data would be worse in =
this case, and they could arguably be better since any incomplete =
azimuthal scrambling of the light in the fibers would be more smeared =
out. During APOGEE-1 commissioning we did tests with offset exposures =
and I can=92t remember the details, but I don=92t recall strong =
systematic effects.  Of course, by adding three groups of APOGEE =
exposures dithered in a triangular pattern we assume those systematics =
are smoothed out in the sum. =20
But it seems that the first solution would be easiest?
Steve
On Jun 26, 2015, at 2:21 PM, John K. Parejko  =
wrote:
> Co-observing is specifically timed so that an AB pair occurs within =
one MaNGA dither. That requires the particular timing that was worked =
out last fall. Because of this, the observers cannot modify the exposure =
times for co-observing.
>=20
> If we were to go with the shorter MaNGA exposures, we would have to =
either reduce the APOGEE exposure time to fit an AB within a single =
MaNGA dither (e.g., 300s APOGEE exposures), or allow APOGEE exposures to =
occur across MaNGA dithers. We could run a test with the latter, but I =
wonder what odd effects it would introduce into the data, if the star =
moves 1/3 of the way across the fiber in the middle of the exposure.
>=20
> John
>=20
> On 26Jun 2015, at 13:50, Steve Majewski  wrote:
>=20
>> Hi Dmitry =97
>>=20
>> I=92m curious about the bypassing of the APOGEE exposures that was =
done during the MaNGA exposure.  It seems to me that if there was 45 =
minutes of time for MaNGA then there would be enough time for at least =
an ABBA for APOGEE, and perhaps more going into twilight?  Is the issue =
related to APOGEE exposures being constrained within the each of the =
three MaNGA dither visits?  I wonder if it would matter at all to APOGEE =
if MaNGA dithers took place while APOGEE was integrating away.  I think =
that collecting some data with APOGEE is always preferable =97 even to =
get additional RV epochs only.  Is there something I=92m not =
understanding about the details of the MaNGA observing?
>>=20
>> Thanks!
>> -sm
>>=20
>> On Jun 26, 2015, at 8:33 AM, dmbiz@apo.nmsu.edu wrote:
>>=20
>>>=20
>>>                     APACHE POINT OBSERVATORY SDSS 2.5M
>>>=20
>>>                               OBSERVING LOG
>>>                        Thursday June 25, 2015
>>>=20
>>>                                (SJD 57199)
>>>=20
>>> ----  Observing Team ----
>>>=20
>>> Gordon Freischlad
>>> Dmitry Bizyaev
>>>=20
>>> Joe Huehnerhoff (morning troubleshooting)
>>>=20
>>>=20
>>> ---- Observing Summary ----
>>>=20
>>> MaNGA plate exposed:
>>> 1 8618 - DONE. Since we did 3x10 min exposures, APOGEE exposures =
were bypassed.=20
>>> Since we had stray 15 min exposures at the end, we completed also=20
>>> 3x5 min set, as an experiment.=20
>=20
>=20
> --
> *************************
> John Parejko
> john.parejko@yale.edu
> http://www.astro.yale.edu/~jp727/
> 203 432-9759
> JWG 465
> Department of Physics
> Yale University
> New Haven, CT
> **************************
>=20
>=20
>=20
>=20
>=20
--Apple-Mail=_C724AA41-57D9-4F32-898E-900C101CC53C
Content-Disposition: attachment;
	filename=smime.p7s
Content-Type: application/pkcs7-signature;
	name=smime.p7s
Content-Transfer-Encoding: base64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--Apple-Mail=_C724AA41-57D9-4F32-898E-900C101CC53C--