On this page, we list the main changes that affected MUSE and this web site.
|31 May 2019||Intra-dome light contamination due to an imporperly configured monitoring camera has been found to affect data taken betwee 2 February and 18 April 2019. Affected wavelength range is 800 nm - 900 nm. Contamination depends mainly on telescope azimuth, being worse near 0/360 (South). Peak contamination typically varies between 0.3 counts/min to 15 counts/min. All channels are affected in a similar way.
|25 October 2018||Between 17 - 25 October planned interventions for maintenance of the deformable secondary mirror (DSM), and replacement of motor segments of the Nasmyth B adapter/rotator were succesfully carried out. GALACSI and the Calibration Unit of MUSE had to be dismounted. The instrument has been succesfully put back in operations.
|18 September 2018||The Science Verification observing run has been succesfully carried out between 5 - 18 September. Run completion information and data can be found at this link.
|7 August 2018||Due to the failure of laser 4 the NFM Science Verification observation run planned for 7 - 11 August has been postponed.
|4 August 2018||Laser number 4 has a problem which prevented us from carring out the Science Verification observations in NFM. We have also stopped observing MUSE WFM-AO. We expect to recover the laser by September 5th.
|7 May 2018||The first commissioning run of the narrow field mode of MUSE has been succesfully completed the night of 23 May 2018. A Science Verification Call for Proposals has been issued.|
|6 Jan 2018||The outbursting comet C/2015 ER61 was observed on Apr. 08 2017 with MUSE. The MUSE observations, in WFM-NOAO-N mode, were made in the morning twilight. This dataset is available in the ESO Science Archive Facility.|
|12 December 2017
||Data of the galaxy HRG00213 taken during technical time has been made publicly available. To obtaine it please go to the ESO archive.|
| 1 September 2017
||MUSE WFM-AO mode has been officially offered for P101. For details see the Call for Proposals page. Because not all the WFM-AO commissioning runs have been completed yet we offer the Science Verification version of the manual for Phase I P101.|
|17 August 2017||Science verification observations of the WFM-AO mode were succesfully carried out. Nevertheless, due to poor weather these will be completed during a two night run scheduled during September.|
|24 July 2017||
Some, not all, recent observations with the instrumenst at UT4 have exhibited ellipticity. While the cause of this occasional elongation is under investigation the following rules will be applied for MUSE OB classification:
If elongation is defined as: 100*(1 – B/A) %, where
A = FWHM along major axis of stellar object
B = FWHM along minor axis of stellar object
|We remind users of MUSE data that the SGS and Auto Guider information is saved in separate extensions of the MUSE raw science frames.
|13 - 17 July 2017||MUSE+GALACSI commsisioning 2 has been succesfully completed.||Some details of the results will be published for the Call for Proposals fro P101.
|14 - 18 June 2017||MUSE+GALACSI commissioning 1 has been succesfully completed.||First commissioning run of MUSE WFM fed with GLAO corrected images from GALACSI.|
|02 May 2017||Several changes to the instrument have occurred between 21 March and May 2nd. Please check Logbook of changes for details.|
|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.|
|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:
|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. The data 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.|