--------------------------------------
DETAILS OF EACH TARGET OBSERVATION:
--------------------------------------
* NoAO targets, 8"x8" FoV, 0.250 arcsec scale, J-band:
Target_ID(IAU) J(target) Diameter(target)
----------------------------------------------------
J033225.21-275335.0 19.56 mag 2.40"
J033252.87-275114.7 19.69 mag 1.78"
J033210.91-274343.1 19.62 mag 3.02"
J033248.48-275416.0 19.60 mag 2.36"
J033255.88-275328.0 20.70 mag 2.08"
* AO-NGS targets, 3"x3" FoV, 0.1 arcsec scale, J-band:
Target_ID(IAU) J_target(mag) Diameter(target) J (NGS) R(NGS) separation_NGS
Comments
---------------------------------------------------------------------------------------------
J033212.81-274201.6 20.10 2.44" 14.19 mag 15.4 mag 19.06"
Too red NGS. NGS=Punctual source.
**Note** The magnitudes and colors are given in the Vega system. None of the NGs
and targets is brighter than 6th magnitude in the J band.
-----------------------------------------
OBSERVING BLOCKS NAMES FOR EACH TARGET:
-----------------------------------------
Target_ID(IAU) OB_Names
----------------------------------------------------------------
J033225.21-275335.0 sciJ033225.21-275335.0-J-0.250-1/2/3
J033252.87-275114.7 sciJ033252.87-275114.7-J-0.250-1/2/3
J033210.91-274343.1 sciJ033210.91-274343.1-J-0.250-1/2/3
J033248.48-275416.0 sciJ033248.48-275416.0-J-0.250-1/2/3
J033255.88-275328.0 sciJ033255.88-275328.0-J-0.250-1/2/3
J033212.81-274201.6 sciJ033212.81-274201.6-J-0.250-1/2/3/4/5
----------------------
ACQUISITION DETAILS:
----------------------
Five of the six galaxies we are interested in are acquired using SINFONI_ifs_acq_noAO
with blind offsets, in the 0.25 arcsec plate scale (8"x8"). The exposure times used
for the reference stars guarantee a S/N enough to detect the star without taking
a sky exposure from apart. These exposures times also ensure that the saturation
limit or the remanence effects limit are not reached.
The other galaxy (J033212.81-274201.6) is acquired in the 0.1 arcsec plate scale
(3"x3") in AO-NGS mode, using SINFONI_ifs_acq_NGS. Particular details concerning
it are the following:
* The target is too faint to be detected using a "reasonable" exposure time, so
it will not be seen in the acquisition images. Please, skip the interactive centering
step within the SINFONI acquisition procedure of the OBs corresponding to this galaxy.
* The NGS is very red, which makes the Strehl determination uncertain. Color and
magnitude of the NGS are given in the Vega system. The NGS is not brighter than
2 mag in R, nor fainter than R~ 17 mag.
* The telescope guide star coordinates have been provided, as for any NGS fainter
than 11 mags is mandatory that the guide star coordinates are given by the users
(SINFONI User Manual, section 12.1.1).
None of the reference/guide/NGS stars used in the OBs is brighter than 6th magnitude
in the J band.
-----------------------
OBSERVING STRATEGIES:
-----------------------
All the galaxies have radii less than 1.5" (i.e., they can be framed into a 3"x3"
box). We are going to use the 0.25 arcsec scale plate in five galaxies in noAO mode,
which provides a FoV of 8"x8". So each one of these five galaxies can be framed
into one quadrant of the SINFONI FoV. The sky can be obtained from the "object"
data themselves when possible, just placing the galaxy in different quadrants of
the SINFONI FoV in A and B exposures. The FoV is never rotated, as we do not prefer
a finer sampling in any direction, and it facilitated the centering of the galaxy
in the quadrants and the choice of the offsets.
For the galaxy which is going to be observed in AO-NGS mode, it will be used the
0.1 arcsec plate scale, providing a 3"x3" FoV (so the galaxy is entirely imaged).
The sky is taken apart from the galaxy position.
None of the targets is brighter than 6th magnitude in J.
The following observing strategies have been followed, depending on the target conditions:
- For galaxies J033255.88-275328.0, J033248.48-275416.0, J033210.91-274343.1, J033225.21-275335.0,
and J033252.87-275114.7:
"Sky" exposures taken with the Fixed_SkyOffset template contain the target in different
positions to the "Object" ones, in order to double the exposure time of the galaxy.
The galaxy is framed into one different quadrant of the 8"x8" SINFONI FoV in "A"
and "B" exposures. The quadrants have been selected in the following way: the galaxy
quadrant in the exposure "A" must sample sky in the next "B" exposure. The same
must happen with the galaxy quadrant in the "B" exposure with respect to the previous
"A" exposure (of course, quadrants with the galaxy must be different in both exposures).
Performing A-B, we will obtain a data cube with twice the information of the galaxy,
one in positive and the other in negative, but both sky-corrected. We can re-arrange
the information to obtain a unique sky-corrected datacube of the galaxy, with twice
the exposure time. We have preferred this template to the GenericOffset template
because the implementation of parameters were easier in this one for our cases,
and we tested that both templates took the same execution time approximately. Warnings
obtained in this OB when verifying it are due to this fact:
1) "warning: the sky offset field appears to be too close to the target" (Yes, in
fact, it contains the target in other position).
2) "warning: the jitter box appears to be very small" (if it is incremented, there
is the possibility that galaxy datacubes overlap, making impossible the sky-subtraction
as previously commented. We think that a jittering of 2 pixels in each direction
is enough to remove bad pixels and to prevent overlapping).
- For galaxy J033212.81-274201.6:
This galaxy will be observed in NGS-AO, with 0.1" of plate scale. Sky exposures
taken with the Fixed_SkyOffset template do not contain the target. The previously
commented strategy could not be implemented in this galaxy, because the field around
it was very crowded.
-----------------
EXPOSURE TIMES:
-----------------
Final exposures times "on source" (using our observational technique with the target
in all the exposures) are 2h for galaxies: J033255.88-275328.0, J033248.48-275416.0,
J033210.91-274343.1, J033225.21-275335.0, and J033252.87-275114.7 (because the "sky"
exposures also contain the target). The exposure time "on source" for galaxy J033212.81-274201.6
is somewhat shorter: 1h47.5mins.
The execution time of each OB is shorter than 1h05min. The total execution time
of our OBs (19h47m26.000s) fits into our allocated time of 19.8h (19h48min).
DIT for science exposures is always equal to 150s, due to the typical temporal variation
scale of the sky emission in the J-band. Exposures with DIT=150 s for the target
and for the sky exposures do not reach neither the saturation limit, nor the remanence
effects limit (10K e-/pixel).
-----------------
FINDING CHARTS:
-----------------
For all the galaxies, we provide two finding charts per OB (they are identical for
OBs associated to the same galaxy):
- A wide field finding chart with a FoV of 1'x1', named as _wide.jpg.
- A narrow field finding chart with a FoV of 8"x8", named as _narrow.jpg.
For certain galaxies, the reference star from which to offset falls beyond the 1'x1'
field centered on the target, so we have included some extra finding charts with
a wider FoV (1.5'x1.5'), in order to mark this reference star. The galaxies that
contain this 1.5'x1.5' field are: J033252.87-275114.7, J033210.91-274343.1, J033248.48-275416.0,
and J033255.88-275328.0. This finding charts are named as _extrawide.jpg.
*** IMPORTANT: The brightest object in each finding charts is also marked. Their
magnitudes in the J-band (Vega) ARE SHOWN EXPLICITLY IN THE FINDING CHART. ***