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Time Critical |
Last update of this page: Thu Jan 29 15:41:33 2009
Run State: COMPLETED
USD review status:
O.K.!
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Special Remarks:
The imaging of the comet should be simultaneous with the SPITZER observations 15 MAY 2007 and 16 MAY 2007. Please see below and readme file for additional information
Abstract for MTS:
FORS2 R band imaging of the ROSETTA target comet 67P/Churyumov-Gerasimenko in parallel with Spitzer. So the execution is time critical!
The FORS2 imaging of the comet should be performed as much as possible simultaneously with the Spitzer observations and that the VLT OBs (duration 0.25h/OB) are spread as much as possible equally over the Spitzer observing windows.
The Spitzer windows are scheduled for
15 May 2007 2:30-11:10 UT
16 May 2007 2:20-11:10UT.
A minimum requirement are 3 OBs per night: one at the beginning, one in the middle and one at the end of the nightly Spitzer window. The OBs that cannot be performed in parallel to Spitzer, should be executed within 3 days from the Spitzer ones.
(1) If possible, please perform all OBs within Spitzer observing windows ,i.e.:
5 on May 15
(OBS name:
- MOV_67P_Spitzer_15May_A
- MOV_67P_Spitzer_15May_B
- MOV_67P_Spitzer_15May_C
- MOV_67P_Spitzer_15May_D
- MOV_67P_Spitzer_15May_E)
5 on May 16
(OBs name:
- MOV_67P_Spitzer_16May_A
- MOV_67P_Spitzer_16May_B
- MOV_67P_Spitzer_16May_C
- MOV_67P_Spitzer_16May_D
- MOV_67P_Spitzer_16May_E)
at roughly equal time steps (typically every 1.8h).
(2) If (1) is not possible, try to execute one OB at the beginning, one in the middle and one at the end of the Spitzer window as close in time to the Spitzer observing epoch as possible.
(3) If (2) is not possible, try to execute the OBs within 3 days from Spitzer covering the maximum possible time interval,i.e. at least spread over the nightly visibility window. In that case avoid execution of more than 2 OBs in sequence.
- Blind acquisition, i.e. object identification is not necessary, though easily possible (by blinking). Please check telescope pointing through DSS image!
- Ephemeris provides in 10min time steps for the daily visiblity window of the comet at Paranal
* RADEC positions (hh mm ss.ss, sdd mm ss.s)
* RADEC velocities (arcsec/s)
* Airmass
* Vis. Brightness (mag)
* distance comet-moon TOM (deg)
* moon phase (%)
No finding charts are attached to OBs.
README of this run:
Web version of approved README readme_79068700.html