[Comm2011] Dome lamp shutting off after 10 minutes during Gain?

Tue Aug 9 06:16:33 CEST 2011

Hi John,

the reason for the strange exposure times was a 1 day 'glitch' in the 
FIERA software, which occured presumably due to a non 100% clean 
installation of a new FIERA software version. In particular, it is due 
to a wrong sign in the time recorded for the Shutter Opening/Closing. As 
a matter of fact, you will notice that all images taken between roughly 
20:00 UT on August 2 and 3 have the exposure times wrong by +-0.804 s, 
which is the time of the shutter motion.

As of August 4 the situation is stable, due to a clean restart of the 
software.

Regarding the lamp switch off: this would up to today have happened 
every time that the lamp is in operation for more than one hour. There 
is an automatic time-out of 1hr, which is only reset when the lamp is 
switched on for the first time, but not if you take a sequence of flat 
images. Having said this, in normal daytime calibrations it should not 
have occured anyway, since the automatic calibrations would do a 1.5hr 
dark before the gain. It may be that the calibration OB was edited by 
hand on that day, omiting the darks, and resulting in a very long 
sequence of dome flats + gain, > 1h.

Andrea has increased the timeout to 3 hrs, so I think we are fine.

Cheers,
Steffen

On 08/08/11 18:23, John P. McFarland wrote:
> Hi Steffen,
>
> The keyword treatment can wait unless the ingest problems can't be 
> fixed (highly unlikely that they can't).
>
> The integration times for 3 out of the last 5 gain templates have 
> those exact time sequences.  The exceptions are on the 3rd of August 
> as Ewout reported and the one for 1st July where the times look good, 
> just much longer (1-60 seconds).
>
> Cheers,
>
>
> -=John
>
>
> On Mon, 8 Aug 2011, Steffen Mieske wrote:
>
>> Hi John,
>>
>> Andrea implemented the default lamp keyword, as I had written to you. 
>> We can discuss again the issue of the individual lamp keywords with 
>> Andrea, at the time we agreed that this was low priority during OCAM3 
>> since it is not lacking information as such. The permanent inclusion 
>> of this keywords with values either T/F is something I can also ask 
>> Paranal Software to implement after OCAM3, so no need for Andrea to 
>> do this now.
>>
>> The gain template issue is reaaaally strange, I will include it again 
>> in tomorrow's calibration.
>>
>> I first thought that the lamp switches off because there is some 
>> integration with EXPTIME=0 sec, some bias inbetween. But this should 
>> not the case according to the below content of the gain template that 
>> is used for the daily calibrations. Can you confirm that those are 
>> the integration times that you see in the normal case (the data from 
>> August 3 are not here anymore, so I cannot check)?
>>
>>
>> # calib template OMEGACAM_img_cal_gain
>> TPL.ID                   "OMEGACAM_img_cal_gain";
>> TPL.NAME                 "Use Dome FF to check gain";
>> TPL.MODE                 "FLAT";
>> DET1.WIN1.UIT1           "0.2 4.3 4.0 0.3 0.7 3.5 2.7 0.1 1.4 2.1 2.1 
>> 1.4 0.1 2.7 3.5 0.7 0.3 4.0 4.3 0.2";
>> SEQ.NEXPO                "20";
>> INS.FILT.NAME            "z_SDSS";
>> INS.LAMP.SET             "Default";
>>
>> Cheers,
>> Steffen
>>
>>
>>
>>
>>
>>
>> On 08/08/11 15:14, John P. McFarland wrote:
>>> Hi Ewout,
>>>
>>> I have asked Steffen to discuss with Andrea the logic of how the 
>>> lamp keywords are included.  If the logic is affecting the ingest we 
>>> need to either adapt or adjust the logic.
>>>
>>> Andrea and Steffen, have you come to any resolution concerning the 
>>> lamp keywords?  It seems to me that removal of the keywords is a 
>>> poor way to indicate the lamp is off.  I assume that is what the 
>>> state keyword (e.g., INS.LAMP1.ST) is meant to indicate.  Please 
>>> tell us of your ideas regarding this.  Thanks!
>>>
>>> Cheers,
>>>
>>>
>>> -=John
>>>
>>>
>>> On Mon, 8 Aug 2011, Ewout M. Helmich wrote:
>>>
>>>> Hi Bernard,
>>>>
>>>> It looks like all the gain templates for OCAM3 taken up to this point
>>>> are wrong. After about 10 minutes, in the middle of the gain template,
>>>> the lamp appears to shut down. Lamp header items then disappear, which
>>>> resulted in errors during ingest here (note to Danny).
>>>>
>>>> Also, the first gain template taken during OCAM3 has strange exposure
>>>> times (see below). The exposure times for the 2nd and 3rd template 
>>>> are ok.
>>>>
>>>> Ewout
>>>>
>>>> ---------------------------------------------------------------------
>>>>
>>>> # Filename, template.start, template.type, EXPTIME
>>>>
>>>> OMEGACAM.2011-08-03T13:22:00.734.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN -0.704
>>>> OMEGACAM.2011-08-03T13:30:39.989.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN -0.604
>>>> OMEGACAM.2011-08-03T13:19:06.032.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN -0.504
>>>> OMEGACAM.2011-08-03T13:27:45.437.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN -0.104
>>>> OMEGACAM.2011-08-03T13:24:54.515.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 0.596
>>>> OMEGACAM.2011-08-03T13:25:37.206.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 0.904
>>>> OMEGACAM.2011-08-03T13:16:51.761.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 1.004
>>>> OMEGACAM.2011-08-03T13:28:30.448.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 1.104
>>>> OMEGACAM.2011-08-03T13:23:28.225.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 1.296
>>>> OMEGACAM.2011-08-03T13:19:50.152.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 1.504
>>>> OMEGACAM.2011-08-03T13:26:17.436.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 1.896
>>>> OMEGACAM.2011-08-03T13:22:41.584.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 2.204
>>>> OMEGACAM.2011-08-03T13:20:30.803.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 2.696
>>>> OMEGACAM.2011-08-03T13:24:11.945.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 2.904
>>>> OMEGACAM.2011-08-03T13:29:11.268.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 3.196
>>>> OMEGACAM.2011-08-03T13:17:32.721.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 3.496
>>>> OMEGACAM.2011-08-03T13:21:14.223.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 3.504
>>>> OMEGACAM.2011-08-03T13:27:01.517.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 4.304
>>>> OMEGACAM.2011-08-03T13:18:20.842.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 4.804
>>>> OMEGACAM.2011-08-03T13:29:55.428.fits 2011-08-03 13:12:39
>>>> FLAT,DOME,DETGAIN 5.104
>>>>
>>>>
>>>> awe> q = (RawFitsData.template.start ==
>>>> dateutil.parser.parse('2011-08-05 15:17:32'))
>>>> awe> for f in q.order_by('DATE_OBS'): print f.filename,
>>>> len(RawDomeFlatFrame.raw_fits_data == f)
>>>> ...
>>>> OMEGACAM.2011-08-05T15:19:26.683.fits 32
>>>> OMEGACAM.2011-08-05T15:20:10.644.fits 32
>>>> OMEGACAM.2011-08-05T15:20:55.594.fits 32
>>>> OMEGACAM.2011-08-05T15:21:41.954.fits 32
>>>> OMEGACAM.2011-08-05T15:22:41.965.fits 32
>>>> OMEGACAM.2011-08-05T15:23:23.495.fits 32
>>>> OMEGACAM.2011-08-05T15:24:07.366.fits 32
>>>> OMEGACAM.2011-08-05T15:24:50.316.fits 32
>>>> OMEGACAM.2011-08-05T15:25:34.247.fits 32
>>>> OMEGACAM.2011-08-05T15:26:15.407.fits 32
>>>> OMEGACAM.2011-08-05T15:27:00.868.fits 32
>>>> OMEGACAM.2011-08-05T15:27:42.958.fits 32
>>>> OMEGACAM.2011-08-05T15:28:26.899.fits 32
>>>> OMEGACAM.2011-08-05T15:29:10.329.fits 32
>>>> OMEGACAM.2011-08-05T15:29:52.919.fits 0
>>>> OMEGACAM.2011-08-05T15:30:40.200.fits 0
>>>> OMEGACAM.2011-08-05T15:31:23.560.fits 0
>>>> OMEGACAM.2011-08-05T15:32:03.781.fits 0
>>>> OMEGACAM.2011-08-05T15:32:47.751.fits 0
>>>> OMEGACAM.2011-08-05T15:33:34.692.fits 0
>>>>
>>>> awe> q = (RawFitsData.template.start ==
>>>> dateutil.parser.parse('2011-08-05 13:38:18'))
>>>> awe> len(q)
>>>> 20
>>>> awe> for f in q.order_by('DATE_OBS'): print f.filename,
>>>> len(RawDomeFlatFrame.raw_fits_data == f)
>>>> ...
>>>> OMEGACAM.2011-08-05T13:40:12.904.fits 32
>>>> OMEGACAM.2011-08-05T13:40:56.774.fits 32
>>>> OMEGACAM.2011-08-05T13:41:41.684.fits 32
>>>> OMEGACAM.2011-08-05T13:42:25.385.fits 32
>>>> OMEGACAM.2011-08-05T13:43:05.425.fits 32
>>>> OMEGACAM.2011-08-05T13:43:45.766.fits 32
>>>> OMEGACAM.2011-08-05T13:44:28.766.fits 32
>>>> OMEGACAM.2011-08-05T13:45:11.576.fits 32
>>>> OMEGACAM.2011-08-05T13:45:51.587.fits 32
>>>> OMEGACAM.2011-08-05T13:46:36.537.fits 32
>>>> OMEGACAM.2011-08-05T13:47:18.658.fits 32
>>>> OMEGACAM.2011-08-05T13:48:03.278.fits 32
>>>> OMEGACAM.2011-08-05T13:48:44.649.fits 32
>>>> OMEGACAM.2011-08-05T13:49:24.999.fits 32
>>>> OMEGACAM.2011-08-05T13:50:10.539.fits 0
>>>> OMEGACAM.2011-08-05T13:50:56.480.fits 0
>>>> OMEGACAM.2011-08-05T13:51:41.590.fits 0
>>>> OMEGACAM.2011-08-05T13:52:25.761.fits 0
>>>> OMEGACAM.2011-08-05T13:53:12.371.fits 0
>>>> OMEGACAM.2011-08-05T13:53:59.232.fits 0
>>>>
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>>>>
>>>>
>>
>>
>> -- 
>> Dr. Steffen Mieske
>> European Southern Observatory
>> Alonso de Cordova 3107
>> Vitacura, Santiago
>> CHILE
>> Tel.: +56 2 463 3118
>> Fax: +56 2 463 3001
>>
>>

-- 
Dr. Steffen Mieske
European Southern Observatory
Alonso de Cordova 3107
Vitacura, Santiago
CHILE
Tel.: +56 2 463 3118
Fax: +56 2 463 3001