README web version of /home/usg/OPS/MTS/readme_xml/readme_79077800

Principal Investigator Email Address

• beuther@mpia.de

Estimated Total Execution Time (hours, including overheads)

• 20 hours 17 min 24 sec

General Description

• This project aims at observing massive accretion disks in the CO fundamental
   band at 4.6mum with AO. 4 sources have to be observed in two spectral setups to
   cover the whole fundamental band. To achieve the necessary S/N ratio several OBs
   have to be executed for most targets (SCI_IRAS18162-*, SCI_IRAS18151-* and SCI_G309.92-*),
   only one source has a single OB (SCI_AFGL4176). Each science OB has a corresponding
   calibration OB (CAL_*) as described in each OB. Since each science OB takes approximately
   1 hour, calibration would be done at similar intervals. This approach is necessary
   if the OB will be executed over many nights. However, if the science OBs will be
   executed many in a row within a single night, we prefer to do the calibration only
   every 2-3 hours and spent correspondingly more time on the targets. Depending on
   weather and seeing conditions, these descision can please be taken by the operator.
   The choice of the calibration stars and times were directed to achieve at least
   the same S/N ratio or better than the corresponding science targets to assure that
   the calibration does not decrease the science S/N ratio.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• We require this cirrus, a seeing of 1.0 and an airmass better than 1.5.

Time-Critical Aspects

• There are no time-critical aspects.

Special Execution Requirements

• To achieve the necessary S/N ratio several OBs have to be executed for
   most targets (SCI_IRAS18162-*, SCI_IRAS18151-* and SCI_G309.92-*), only one source
   has a single OB (SCI_AFGL4176). Each science OB has a corresponding calibration
   OB (CAL_*) as described in each OB. Since each science OB takes approximately 1
   hour, calibration would be done at similar intervals. This approach is necessary
   if the OB will be executed over many nights. However, if the science OBs will be
   executed many in a row within a single night, we prefer to do the calibration only
   every 2-3 hours and spent correspondingly more time on the targets. Depending on
   weather and seeing conditions, these descision can please be taken by the operator.
   The choice of the calibration stars and times were directed to achieve at least
   the same S/N ratio or better than the corresponding science targets to assure that
   the calibration does not decrease the science S/N ratio.
  
  For a better orientation of the calibrator HR4731, we added a 2nd finding chart
   with an AO coronographic image (obtained with the ESO 3.6m telescope + ADONIS, Tokovinin
   et al. 1999). Please observe the central brightest component.

Special Calibration Information

• To achieve the necessary S/N ratio several OBs have to be executed for
   most targets (SCI_IRAS18162-*, SCI_IRAS18151-* and SCI_G309.92-*), only one source
   has a single OB (SCI_AFGL4176). Each science OB has a corresponding calibration
   OB (CAL_*) as described in each OB. Since each science OB takes approximately 1
   hour, calibration would be done at similar intervals. This approach is necessary
   if the OB will be executed over many nights. However, if the science OBs will be
   executed many in a row within a single night, we prefer to do the calibration only
   every 2-3 hours and spent correspondingly more time on the targets. Depending on
   weather and seeing conditions, these descision can please be taken by the operator.
   The choice of the calibration stars and times were directed to achieve at least
   the same S/N ratio or better than the corresponding science targets to assure that
   the calibration does not decrease the science S/N ratio.

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

Do the README file and the instrument comments of the telluric stars
 OBs include the required S/N/pixel of the spectrum of the telluric star, its spectral
 type and allowed spectral range?

• YES

Do any OBs include wavelength or flatfield calibrations?

• N/A

If you are observing Moving Targets, have you attached suitable ephemeris
 files to your OBs?

• N/A

If the slit viewer guide star is different from the target, are the RA
 and DEC offsets accurate to within 0.05 arcsec and do they take into account the
 relative proper motion between the two objects?

• YES

If you have preferences which OBs should be executed first for objects
 at similar RA, did you make use of the User Priority field in the OBs?

• N/A