night-report-page---20130305

Observers: Nic Walton, Nadia Blagorodnova, Matthew Nicholl

Sunset: UT 23:19 / Twilight 00:32 - 09:16 / Sunrise 10:29 LST 6-16hrs

Classification Followup Stds: Tech probs

All times in this report approximate UT (Chilean time currently UT - 3hrs)

EFOSC: All OBs in the 188.D-3003(Q)/VM/EFOSC2 directory on the observers OB Execution machine (wg5dhs)

On wg5dhs - OBs held in /home/visitor/p2pp-impex/nblago

Phot std finders at http://www.eso.org/sci/observing/tools/standards/Landolt.html

Afternoon Calibrations

UT: - Bias runs - PESSTO_bias (11 bias frames - execution time 6 mins)

UT: - Spec flats and arcs -

Twilight Calibrations

UT: 2325 - Sky flats UBVRi

UT: 2330 - sky conditions good, no clouds, no wind, seeing ~0.7 arcsec

UT: 2355 - GD71 - Spec flux std - g11/13/16 with 1 slit (15m OB)

UT: 0010 - telescope image analysis

SCIENCE OBSERVATIONS (EFOSC2)

UT: 0030 - Classification SSS130304:055628-172343 - Gm13 (15m OB)

SNID: classifies as SN IIn (13 days pre max - z~0) - very blue spectrum.

UT: 0045 - seeing deteriorated to 1.9 arcsec - but we stayed with the 1 arcsec slit for the above obs.

UT: 0055 - seeing improving 1.5 arcsec

UT: 0100 - Classification OGLE2013-SN-017 - Gm13 (20m OB)

SNID: classifies as SN IIn (at +14 days) (also could be a 91T at -9 days - but the SN is in a spiral galaxy).

UT: 0120 - Classification MASTER OT J081031.62 111450.2 (20m OB)

This was a lot fainter than listed in the Marshal - clearly not a bright 14 mag object.

SNID: spectrum not good enough to classify.

UT: 0130 - seeing now at 0.8 arcsec

UT: 0210 : FollowUp OGLE2013-SN-016 (gr11, gr16) (2h15m)

No guide star found in advance of moving to field - thus needed a different strategy.

First - go to object via the EFOSC_img_acq_PresetNoGuide template. Then once at the object change the OB to use EFOSC_img_acq_RotateToSlit. (if you use this from the start the tel won't move as it wants to find a guide star - when there isn;t one!).

computed parallactic angle for object (was 89 deg for this time) (http://www.eso.org/sci/observing/tools/calendar/ParAng.html)

Then added 180deg so that the EFOSC guide field would be on the 'other side' and subtracted 90 to get a rotator angle of 179 - which we set in the OB.

This all worked - we found ONE! guide star - and BOB didn't crash (which it had done with the normal img_acq_MoveToSlit

Even with this need to search around for a suitable guide star.

UT: 0420 - seeing ~1 arcsec

UT: 0430 - LTT 3864 - Spec flux std - g11/13/16 with 1 arcsec slit (15m OB)

UT: 0450 - Classification SSS130304:114144-171349 (Gr13) (17m OB)

SNID: classifies as SN Ia at -5 days to peak, z~0.04 - good spectrum

UT: 0510 - Classification SSS130304:114445-203141 (Gr13) (12m OB)

SNID: classifies as SN Ia at -10 days before peak, z ~0.04 - good spectrum

UT: 0525 - classification CSS130214:131241-043429 (Gr13) (20m exposure)

SNID: too faint to get a classification

UT: 0553 - SWITCH TO SOFI (30m)

SCIENCE OBSERVATIONS (SOFI)

UT: 0610 SN2013K JHK (obs block 1h5m)

UT: 0710 PSNJ15213475-0722183 JHK (obs block 1h25m)

UT: 0715 EFOSC2 arcs

(obtained in parallel with the SOFI science data)

UT: 0730 - cloud moving in from the south - now impacting the observations.

UT: 0800 - cloud cleared

UT: 0825 SN2012ca JHK (obs block 1h30m)

UT: 0945 - at end of night - observing conditions good.

End of first March sub run.