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|
 |
| |
| QC
PLOTS |
| |
CURRENT |
HISTORY |
| QTH10
flat lamp |
 |
 |
| QC1
database (advanced users): browse
| plot |
| QTH50
flat lamp |
|
|
| QC1
database (advanced users): browse
| plot |
| He
arc lamp |
|
|
| Ne
arc lamp |
|
|
| Ar
arc lamp |
|
|
| QC1
database (advanced users): browse
| plot
|
Click on CURRENT
to see the current trending (Health Check).
Click on HISTORY
to see the historical evolution of the trending. |
VIMOS has the following types of calibration
lamps:
- QTH10 halogen lamp: used for MOS spectroscopic
flats with LR and MR grisms and for IMG screen flats with VRIz filters
- QTH50 halogen lamp: used for all IFU
spectroscopic flats, for MOS spectroscopic flats with HR grisms, and
for IMG screen flats with U and B filters
- Helium arc lamp
- Neon arc lamp
- Argon arc lamp.
QC1 parameters
| parameter |
QC1 database: table, name
|
procedure |
| IMG lamp performance (QTH10/QTH50) |
vimos_scrflat, efficiency |
median level of 1600x1800 central pixels from screen
flats, divided by exposure time |
| IFU FF lamps (QTH50 performance) |
vimos_ifu_flat, flux |
measured from IFU flats; mean integrated signal per
fibre per second |
| He, Ne, Ar arc lamp performace |
vimos_ifu_lamps, He_flux
vimos_ifu_lamps, Ne_flux
vimos_ifu_lamps, Ar_flux |
measured from IFU arc lamp; integrated flux of a
single emission line (per fibre) |
Trending
For performance trending of the flat field lamps used
for IMG mode, screenflats with UBVRI filters are used. For IFU flat trending,
daytime Health Check measurements with HR_orange are used. Arc lamp performance
is also trended with daytime HR_orange IFU calibrations.
History
| date |
event |
| 2007-10 |
exchange of He lamps; new flux level
is a bit lower |
| 2008-03 |
adapted extraction algorithm for IFU
flats with pipeline version V2.1.9; extracted flux decreased (IFU
FF lamps plot) |
| 2009-12 |
pipeline V2.2.6 makes use of individual exposure times for the arc lamps (which are not available before 2009-11); therefore, pipeline-calculated flux changed |
| 2010-10 |
lamp flux problems for He and Ne, see PPRS-037215 |
| 2014-09 |
HC plot IFUQTH10 removed from navigation bars because the IFU LR_red flats that are used here are actually taken with the QTH50 lamp since 2009-11-25 |
|
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