Basic information
-----------------

  Proposal ID = 60.A-9284(G)
  Instrument = HAWK-I
  Priority class = N/A
  Approved execution time = ??
  Type = Science Verification
  P.I. = Soeren S. Larsen

  
General Description
-------------------

This is a programme to image globular clusters in the merger remnant
NGC 1316. We have previously obtained VIMOS pre-imaging and spectra
of clusters in this galaxy and in this programme we carry out deep 
imaging in the Ks band of one of the VIMOS quadrants with HAWK-I to 
further constrain ages, metallicities and spatial distributions of 
different star cluster populations.

Observations should be carried out as sequences of B-T-T-B-T-T-B ..
where 'B' are Background fields and 'T' are target fields. The 'B'
and 'T' observations should have identical exposure times of
NDIT=10 and DIT=10 s. A random offset between -15..+15 arcsec
should be applied to the pointing before every exposure.

We aim for a total of 3 hours of integration time on-target (i.e.
108 observations of 10x10 s) and 1.5 hours on sky (i.e. 54
observations of 10x10 s) in a seeing of 0.80" or better.
These can be grouped together in OBs of 16 target and 8 background
exposures, each lasting one hour. If OBs are executed 
non-consecutively, it would be good to have one 'B' exposure
both at the beginning and at the end. This would add a total of 15
min to the execution time in the worst case (7 OBs executed
non-consecutively) - if this is unacceptable to the SV team, 
an alternative would be to simply replace the last 'T' exposure
in each OB with a 'B' exposure. 

Our target field is centred at (RA, Dec)_2000 = (03:22:59, -37:10:00).
Note: This is *not* centered on the galaxy nucleus, but keeping the
nucleus near one corner of the HAWK-I FOV.  A good location for the 
background field would be about 20 arcmin North of the target field, 
i.e. roughly centred at (RA, Dec)_2000 = (03:23:00, -36:50)

Waiver requests
---------------
N/A

Critical Observing Condition Constraints
----------------------------------------
See under "Special Calibration Information" below

Time-Critical Aspects
---------------------
N/A

Special Execution Requirements
------------------------------
See under "Special Calibration Information" below

Special Calibration Information
-------------------------------
We request that at least one OB (can be less than one hour long,
e.g. 47 min; see below) is executed under photometric conditions, 
immediately pre/superceded by standard star observations at 
similar airmass.

ToO information
---------------
N/A

P.I. email
----------
larsen@astro.uu.nl

Estimated execution time
------------------------

Per OB:
  Telescope preset                   =  6   min
  Target acq.                        =  3   min
  Integration = 10 x 10s x 24        = 40   min
  Read-out    = 10 x 24 x 0.03 min   =  7.2 min
  Offset      = 24 x 0.15 min        =  3.6 min
  ---------------------------------------------
  Total                              = 59.8 min

  6 OBs like this amount to 160 min of science time + 80 min of sky.
  The remaining 20 + 10 min require an OB of 47 min
  
  Thus, the estimated total is 6 hrs 46 min