5. Timeline¶
Here we document the timeline of changes to SEDM.
Date (UT) |
IFU CCD |
RC CCD |
Description |
---|---|---|---|
2023/04/07 |
26265 |
04001312 |
IFU Pixis CCD camera replaced with Andor CCD and pylos replaced with linux computer |
2023/02/07 |
05313416 |
04001312 |
P60 weather station replaced and operating again |
2022/10/17 |
05313416 |
04001312 |
P60 weather station struck by lightning |
2022/07/01 |
05313416 |
04001312 |
pharos retired and all processing done on minar going forward |
2022/06/16 |
05313416 |
04001312 |
Primary mirror removed, resurfaced, and replaced |
2021/08/06 |
05313416 |
04001312 |
Adjusted P60 secondary defining points to alleviate vacuum system problem |
2021/08/03 |
05313416 |
04001312 |
Repaired Dry Air system online again |
2021/07/17 |
05313416 |
04001312 |
P60 secondary issues return |
2021/06/23 |
05313416 |
04001312 |
Dry Air system failure |
2020/10/29 |
05313416 |
04001312 |
Re-installed repaired Dry Air system and discovered there is no flow control |
2020/10/09 |
05313416 |
04001312 |
RC AtoD threshold adjusted so low-background values do not get set to zero |
2020/10/06 |
05313416 |
04001312 |
RC serial number fixed, now correct |
2020/10/05 |
05313416 |
04001312 |
Adjusted RC alignment and updated RC-IFU offset in pipeline (RC serial still wrong) |
2020/10/03 |
05313416 |
04001312 |
Returned to operations with original RC CCD in RC spot, however serial number still shows old IFU CCD number 2803120001 and AtoD threshold too high |
2020/10/01 |
05313416 |
2803120001 |
Telescope down for two nights to repair secondary vacuum system and replace RC camera |
2020/08/28 |
05313416 |
2803120001 |
Kept original IFU CCD in RC spot, after finding condensation on outside of RC window, disabled dry air system |
2020/07/15 |
05313416 |
2803120001 |
Instrument control computer mounted on telescope |
2020/07/10 |
05313416 |
2803120001 |
Put original IFU CCD in RC spot due to loose USB port, using spare fibre |
2019/09/18 |
05313416 |
04001312 |
P60 secondary axial supports adjusted even closer to retaining ring |
2019/09/16 |
05313416 |
04001312 |
P60 primary washed (+12% refl.), RA coupling replaced |
2019/09/13 |
05313416 |
04001312 |
P60 secondary axial supports moved to retaining ring to minimize vacuum involvement |
2019/09/06 |
05313416 |
04001312 |
P60 secondary re-installed after friction reduction on radial defining points |
2019/09/02 |
05313416 |
04001312 |
P60 secondary removed for vacuum system overhaul and testing |
2019/08/11 |
05313416 |
04001312 |
S/N measurement star observations taken (focus was good) |
2019/06/12 |
05313416 |
04001312 |
First evidence of P60 focus problems |
2019/05/20 |
05313416 |
04001312 |
Re-set IFU camera and CCD optics stage: achieved good focus @ 0.4 mm |
2019/05/15 |
05313416 |
04001312 |
Laser verification of optical alignment, re-centered IFU CCD |
2019/05/14 |
05313416 |
04001312 |
New PI CCD re-installed in IFU position |
2019/04/23 |
2803120001 |
04001312 |
Replaced fold mirror with Acton coated fold, moved expander lens, cleaned MLA, Original IFU CCD installed while New PI CCD sent in for board upgrade |
2019/04/18 |
05313416 |
04001312 |
Replaced pickoff mirror with Acton coated pickoff, trimmed RC standoffs |
2019/02/08 |
05313416 |
04001312 |
Installed instrument with upgraded enclosure, new pickoff/fold mirrors, original optics |
UPGRADE #2: Re-did interface plate, enclosure, cable management, new pickoff/fold mirrors, kept original optics. |
|||
2019/01/05 |
05313416 |
2803120001 |
Removed instrument for upgrade #2 |
2018/09/27 |
05313416 |
2803120001 |
Put original IFU CCD in RC spot |
2018/08/15 |
05313416 |
04001312 |
S/N measurement star observations taken |
2018/08/13 |
05313416 |
04001312 |
Last use of kpy pipeline |
2018/07/08 |
05313416 |
04001312 |
Start of pysedm pipeline |
2018/06/30 |
05313416 |
04001312 |
Last A/B exposures taken |
2018/06/19 |
05313416 |
04001312 |
Installed Jenoptik MLA PN: 107578 520 micron pitch |
2018/05/08 |
05313416 |
04001312 |
New PI CCD in IFU spot with corrected SER_NO |
2018/01/11 |
2803120001 |
04001312 |
Original RC CCD, New PI CCD sent for repair |
2017/09/09 |
2803120001 |
08646C7F- |
Installed instrument with upgraded enclosure, original optics |
UPGRADE #1: Kept mountings and interface plate, re-did enclosure to put electronics outside optics cavity, re-did RC mounting. |
|||
2017/02/28 |
2803120001 |
08646C7F- |
Removed instrument for upgrade #1 |
2016/07/07 |
2803120001 |
08646C7F- |
New PI CCD in RC spot with incorrect SER_NO (should be 05313416) |
2016/06/02 |
2803120001 |
04001312 |
Original RC CCD (now repaired) |
2016/04/25 |
2803120001 |
08098513 |
Original IFU CCD (now repaired) |
2016/03/26 |
none |
08098513 |
Moved loaner IFU CCD to RC |
2016/02/29 |
08098513 |
04001312 |
Loaner CCD from PI for IFU |
2015/11/15 |
2803120001 |
04001312 |
Earliest data set in /scr2/sedm/raw on pharos |
2014/01/31 |
2803120001 |
04001312 |
Earliest definitive appearance of ‘stripes’ in original IFU CCD data |
2013/03/12 |
2803120001 |
04001312 |
Earliest data set in /scr2/npk/raw on pharos |
Table 1 shows the dates when major changes to the instrument hardware were made. This table does not capture adjustments of optics or minor hardware changes. Column 1 is the date the change was made, column 2 is the IFU CCD serial number, column 3 is the RC CCD serial number, and column 4 describes the hardware change.
Last updated on 17 May 2023