RA Range: 1.9h - 10.5h

Constraint set (Typical seeing, Transparency,Airmass, FLI, Moon distance): 1.2 2CLR 1.8 0.4 30

Pre-imaging run?	No!	Chilean run?	No!	Special calibrations?	No!
Time critical?	No!	ToO?	No!	Carry-over run?	No!

 

The program is performing a wide-field search for Herbig-Haro objects (shocks
in protostellar outflows) in the Orion A cloud. Herbig-Haro objects are
emission line objects, emitting strongly in Halpha and particularly in the
[SII] lines at 6716.4/6730.8 A. So, PI proposes take deep exposures through
narrow band filters centred on the Halpha line and on the [SII] lines, plus a
nearby, emission line free medium passband filter to discriminate emission
line objects from continuum objects.

  ! Critical Aspects:
There are a total of 14 survey fields. The data are useful only if for
a given field at least one narrow band image along with the continuum image
are taken.

PI suggests the follow this observing strategy:
- During the first session take continuum images of a number of survey fields
- During the subsequent sessions, take Halpha images of these
- Then, during the next sessions, take SII images of these
- Then go to new fields, and start with continuum images, and so on...
Following this strategy will reduce the time needed for spectrophotometric
standards and flatfields, as each standard/flatfield can be used to calibrate
several science frames.

Skyflats and domeflats have to be taken for the filters used during the
repsective nights. Corresponding calibration OBs have been submitted.


 

Run status page 68.C-0282A

README of this run:

68.C-0282A.README