On this page, we list the main changes that affected MUSE and this web site.

News about Science Data Product Forum

We would like to draw your attention about the existence of the Science Data Products internet forum which can be found at:


21 March 2017 First commissioning of GALACSI started.    
6 March 2017 GALACSI has been installed in the Nasmyth B focus. MUSE is expected to re-start science operations (except time critical observations) around 21 April 2017.
GALACSI in the optical path has reduced the size of the SGS patrol field.
9 October 2016 - 10 November 2016 MUSE out due to installation of adaptive secondary mirror. The system has been recommissioned on 27 November 2016, and its functioning has been shown to be at the nominal performance. An internal report has been generated as document ESO-203117.
No changes observed. The barred galaxy HRG 00231 was observed on 27 November as part of the commissioning activities and the data was made public.
21 June 2016 Realignment of channels 01, 06, 09, 12, 13, and 19
All calibrations affected except bias and darks.  
19 July 2015 The detector voltage configuration files for Channels 1 and 9 were changed. The first file with the new voltages is MUSE.2015-07-19T19:09:04.193.fits. This change affects BIAS, DARKS, FLATS, ARCS, and GEOMETRIES. Science taken after 2015-07-19 must be reduced with the calibration data taken after this date.
12 June 2015
The mean resolution of CHAN01 of MUSE degraded on 7 May 2015 from 3000 to 2550. We are currently investigating the origin of this change in resolution and hope to fix it as soon as possible. Notice that this channel had a particularly high resolution before March 31st which decreased after the exchange of detectors (see news from 31 Mar below) to a value similar to those of the other channels.
7 May 2015 The detector control system has been upgraded. There have been also a changes of cables and pre-amplifiers. This has reduced and stabilized the bias structure, and RON. Science data taken after this date should be reduced with calibrating data taken also after this date.    
31 Mar 2015 The detector vessel of channel 1 has been exchanged. The old detector showed amplifier glow that we expect to eliminate with the new detector.  Science data taken after this date should be reduced with calibrating data taken also after this date.    
17 Mar 2015 A  forum has been created to channel and share questions and answers about the use of MUSE, from proposal preparation to data reduction and analysis. If you have any questions please post it at the MUSE Forum.
4 Mar 2015 MUSE User Manual v1.3.1 for P96 Phase I released    
6 Feb 2015

MUSE will not be available for operations due to the following technical activities:

  • March 29 to April  4: installation of the 1st unit of the 4LGSF and Change of Period activities
  • April 29th to May 8th: commissioning of the 1st unit of the 4LGSF;
  • September 21 to September 30th: UT4 maintenance
28 Jan 2015 MUSE pipeline version 1.0.1 released, details.    
5 Dec 2014 MUSE pipeline version 1.0. released,  details.    
4 July 2014

Version 0.18.2 of the MUSE pipeline and data reduction cookbook have been released, they can be found here. This version is necessary to reduce data taken when temperatures are below approximately 7°C: the recipe muse_flat has problem tracing some of the slices in channel 6. This is a known problem that we are currently working on and likely it will be fixed in the near future, however for the time being to overcome this problem we urge you to follow the recovery procedure described in section 8.2 of the latest Cookbook manual (version 0.18.2).

30 June 2014 Science verification observations were conducted between June 20 and June 29. Details and completion rate of the different proposals can be found here.    
26 May 2014: MUSE User Manual for Science Verification and Period P4 (v1.1) released.    
28 Feb 2014: Final version of MUSE User Manual for Phase I, P94 has been released.
22 Feb 2014: The first commissioning run of MUSE has been succesfully completed.    
31 Jan 2014: MUSE sees First Light  
9 Jan 2014: Succesfull landing of MUSE on the UT4 Nasmyth B platform. For the whole story you can visit the MUSE blog maintained by Roland Bacon.