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OT Known Bugs

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Known bugs (and workarounds, where possible) in the Observing Tool are described here. If you find a new problem, please submit the information via the Gemini HelpDesk and include any log messages. The most recent OT log file is called ot.0.0.log and is located in <home>/.ocs15/<version>/log (Windows, Linux) or <home>/Library/Logs/edu.gemini.ot (OSX).

Gemini DSS Images

  • WCS Shift
    There is a ~2.5' shift in the WCS of Gemini DSS images with 19:18:38 < RA < 19:36:21 and 40:08:22 < Dec < 41:17:28. This may make it appear that the catalog coordinates are incorrect, but it does not affect the selection of guide stars. One may select a different image source, e.g. "DSS ESO (II)" or any band of 2MASS to download an image with a correct WCS.

August 2017 (2017B.1.1.1)

  • Windows 10 font display
    You may encounter a display problem in Window 10 in which the fonts in adjacent table rows overlap. This is due to an issue with Windows/java font scaling but this does not affect functionality. A workaround is to change the scaling of text and apps to between 100% and 175%, depending on screen resolution.

December 2016 (2017A.1.1.2)

  • Denied permission to sync
    If you get an error about not having permission to sync, check that the key that you are using is appropriate for the program being edited and then sync again. Occasionally the error will appear even when the key is correct. Sync again to resolve. FIXED in OT 2017A.1.1.5.
  • Cannot select Science Database for key
    If you cannot select a Science Database in the Request a Key dialog, then click Cancel, open the Options tab in the Keychain Manager, and click Reset Keychain. All keys will then have to be re-requested.
  • Failure to download non-sidereal target information
    The JPL Horizons service changed from http to https on 2017-Mar-21. Version 2017A.1.1.2 of the OT uses http and is therefore incompatible. FIXED in OT 2017A.1.1.5.

June 2016 (2016B.1.1.2)
There are no known significant bugs in this release.

December 2015 (2016A.1.1.2)

  • IFU-2 ITC plot does not display X binning correctly
    The new two-slit GMOS IFU-2 ITC pixel-space plot does not display correctly if the binning in X is greater than 1. FIXED in 2016B.1.1.2.
  • Startup screen fails to appear
    There have been a few reports of the 2015B and 2016A OT failing to start properly. The symptom is that the OT hangs and the startup screen never appears. The only known solution is to delete the keychain file:
        Linux: ~/.gemini/bundle/edu.gemini.util.trpc/keychain.ser
        Mac: ~/Library/Application\ Support/Gemini/bundle/edu.gemini.util.trpc/keychain.ser
        Windows: \Users\USER\AppData\Roaming\Gemini\bundle\edu.gemini.util.trpc\keychain.ser
    and restart the OT. The startup screen should appear as normal, and you must then use the keychain manager to request new keys.
  • ITC GMOS IFU-2 pixel graph zoom bug
    The zoom in/out feature on the GMOS IFU-2 pixel-space graph is not working correctly. Zooming in by using the mouse to draw a box in the graph works fine, but after zooming back out the upper wavelength axes will have limits of 0-1.
  • F2 longslits drawn incorrectly in the TPE
    The FLAMINGOS-2 longslits are currently drawn incorrectly in the TPE. The slits are shown symmetrical about the base position but they actually extend further in the -q direction. They should appear as in the image below. FIXED in 2016B.1.1.2.
    F2 long slit display

July 2015 (2015B.1.1.1)
Proper motions set to zero by target lookup queries
In the 2015A OT the target lookup queries in the OT began using the Simbad server at ESO instead of the decommisioned server at CADC. The ESO server does not return proper motions and all proper motions will be set to zero by the coordinate query. Proper motions for fast-moving targets will need to be entered manually. FIXED in version 2016A.1.1.2.

Simbad Coordinates incorrect for Dec > 0 and RA < 00:40:00
There is currently a bug in the ESO Simbad server that the OT uses for target coordinate lookup. The returned coordinates are incorrect for Dec > 0 and RA < 00:40:00. For 0 < Dec < +10 no results are returned while for Dec > +10 the declinations get truncated, eg. +15:25:15 becomes +5:25:15. ESO has been informed of the problem. The only solution for now is to use other sources for coordinates (the CDS and Harvard Simbad sites return correct results) and to manually enter the coordinates in the OT. We are planning to have the OT use alternative Simbad mirrors in the future. FIXED in version 2016A.1.1.2.

January 2015
Target Name Resolvers:
The "SIMBAD@CADC" target name resolution service used to search by target name and return RA, Dec coordinates, is currently offline due to a hardware failure at CADC. Unfortunately the SIMBAD@ESO and NED searches are also not working at this time. FIXED in version 2015A.1.1.2.

December 2014

  • When attempting to access the ODB with an old version of the OT there should be an error message stating that the old version is incompatible. This is not happening. The 2014B OT allows you to click on the "Open" dialog, etc. and doesn’t complain that you need to update your OT. Instead it indicates that there is a network issue (red symbol in the upper right). FIXED in version 2015B.1.1.1.
  • Java version 1.7 has a known unresolved network issue on the Mac if a hostname does not include a domain name, resulting in slow start times for the application and network connection problems in general. See this page for a workaround. FIXED in version 2015B.1.1.1.

9 December 2013

  • The OT launches more slowly than the previous version and the time increases with the size of the local database. Therefore, we recommend that the local database be kept as small as possible.
  • There is a problem with editing the exposure time in the first step of a FLAMINGOS-2 Sequence Iterator. If the first digit of the exposure time is a 1 then the value will become 1.5 and it will be difficult to edit. In this case, place the cursor within the number, say next to the decimal point, and then type the desired time. Finally, delete the undesired digits. If the desired exposure time does not begin with a 1, then triple-click to highlight the entire number and then type the desired value. 
  • If you open the OT Browser and then click the Catalog button from the Position Editor, then the Catalog Navigator Window will still look like the OT Browser. The workaround is to restart the OT and then open the Catalog Navigator from the Position Editor first.

31 August 2012
When doing manual guide star searches some catalogs do not respect the inner radius or the magnitude limits. Some search radii are also listed in reverse (i.e. min > max).

4 December 2009
Known bugs in 2010A.1.1.2:

  • In the Windows version clicking on the Erase button in the Position Editor causes the OT to hang. Delete guide stars using the Target Component in the Program Editor
  • In Repeat and Observe components the repeat (X) entry box does not properly save number that are typed in the box. Use the up and down arrow buttons to change the number of repeats. Or, type a number in the box and then click the up arrow, then the down arrow.

24 September 2009
GMOS and Michelle component bugs in 2009B.1.1.3:

  • There is a bug related to the GMOS nod-and-shuffle tab that can prevent a program from being exported to XML. This is fixed in OT 2009B.2.1.1, unfortunately, this bug can appear during the update process. If it occurs there is a way to recover as long as you don't delete anything in the directory ~/.jsky/spdb. If you have a problem with a program then please submit a HelpDesk ticket and we will assist you.
  • In echelle and medN modes, an entered central wavelength in the Michelle static component will often revert to the default of 10.5 microns. One way to help insure that the correct wavelength is used, even if the value in the static component appears wrong, is to add a Michelle instrument iterator to the top of the sequence and add a line with the central wavelength. All observers should be place underneath this iterator. This problem is fixed in the 2009B.2.1.1 version of the OT.
  • The observing wavelength does not reset in multiple passes through a Michelle instrument iterator in which the filter is changing.The work-around is to add the Disperser (set to Mirror) to the Michelle iterator.

05 February 2007
Avispa 2.1 fetch attachment bug:
On Solaris and certain Linux flavors (e.g. Fedora) there is a problem with the feature to fetch attachments. The files will appear to download but the files will not appear in the selected directory.  The problem is related to operating system restrictions on renaming files across file systems (disk partitions).  The easiest work around is to save all attachments to the /tmp directory and then manually move them to the desired location.  The problem was fixed in the 2007B OT.

23 June 2006
Abeja 3.3 GNIRS and GMOS-S bugs:
In the GNIRS static component the number of coadds cannot be saved in the static component, the coadds must be set in a GNIRS sequence iterator. Also, changes to the PA in the static component cannot be saved. The PA can be changed by dragging the slit or IFU field in the Position Editor.  For GMOS-S, the visualization of the IFU nod& shuffle focal plain units in the Position Editor is incorrect and the planned time does not appropriately account for the binning. All of these problems are fixed in Abeja version 3.5 released 30 June 2005.

29 June 2005
Palote 3.1 not compatible with Fedora Core 4 Linux distribution:
We have discovered that the Sun JRE included with the Palote_3.1 Linux distribution is not compatible with the Fedora Core 4 Linux distribution. The symptom is that the fetch/store fails immediately with a stack trace starting as follows:

ERROR [SwingWorker] 2005-06-28 18:16:28,748:  edu.gemini.oodb.OodbClientBase - Connection Invalid argument or cannot assign requested  address

with several more lines. This is a known problem with the Fedora Core 4 people. The FC4 installation notes suggest that users upgrade their JRE to the latest 1.5_04 distribution from Sun at've tested this and confirmed that it fixes the fetch/store problem. After additional testing, we will make a special FC4 version available on the Gemini FTP site.

9 January 2005
RA values considered to have units of hr:
The units for RA are assumed to be hr (hours). Values greater than 24 are 'unwrapped' e.g. 243.7, intended to be in degrees, is interpreted as 10 revolutions plus 3.7hr and is converted to an 'RA' of 3h 42m.

10 Dec 2004 - fixed in public re-release
Sequence not copied when modified observation merged:
After fetching a program and modifying observation sequences, the changes are not correctly integrated when the program is stored to the Observing Database.This only affects Grillo-01.6, which was the initial public release available for about 12hr overnight on 9 December, and is fixed in subsequent releases.

4 Feb 2003 - fixed in river-10 internal release
Offset sequences not preserved when copies are made:
This occurs when an offset iterator is copied from one observation to another and then one of them is edited. The problem is that a new copy of the list is not being made; it is being shared between the copies. This bug also manifests as the apparent 'disappearance' of offset and nod-and-shuffle steps when exporting and re-importing saved (XML file) copies of the science program.

20 January 2003 - fixed in river-10 internal release
Image quality observing condition not loaded correctly:
From semester 2003A, the previous image quality observing conditions (20%, 50%,80% and "any") were changed to (20%, 70%, 85% and "any"). Some science program or Phase I proposal created with OT or PIT from 2002B or earlier and imported into later versions of OT are not correctly translated,e.g. 80% is interpreted as "any". The image quality observing conditions should be checked and changed manually.

11 July 2002 - fixed in OT river release of January 2003
Offset iterator steps are defined in wrong axis for rectangular grid:

  • In the telescope offset iterator, a rectangular grid of steps can be created using the grid pattern tab. The number of steps specified in the paxis (the upper button) incorrectly produces that number of steps in the qaxis (and vice versa). This can be seen by inspecting the iteration table or visually by viewing the offsets in the position editor. The initial offsetand spacing parameters are handled correctly.
  • The pop-up tip (when the cursor is held over the step boxes) incorrectly labels them as RA and dec. The relation between the [p,q] coordinate system and (RA, dec) depends on the defined position angle on the sky.

17 April 2002 - fixed in OT limberlost release of 10 July 2002
GMOS OIWFS does not correspond to current hardware configuration:
As it has an asymmetric configuration relative to the optical axis, the GMOS on-instrument wavefront sensor's patrol field will change when the instrument is mounted on the up-looking and any side-looking port. (The effective patrol fieldis flipped about the x-axis by reflection in the science fold mirror). Thus although the same guide star may in principle be used regardless of port, the instrument may need to be rotated to acquire that star and the OIWFS probe arm will vignette a different part of the field.

The current public OT release (OT2002A.11) assumes that GMOS is on the up-looking port; in fact the instrument is now mounted on a side-looking port.PIs should continue to define their programs using the public OT; their Gemini Contact Scientist will notify them of any problems.

5 February 2002 - fixed in OT river release of January 2003 (use the Position Editor...Catalog...Proxy Server menu)
Guide star catalogue or digital sky survey searches fail because user machine is behind proxy server:
If the user's computer connects to the outside world via an HTTP proxy server then PIT catalogue assistant searches, PIT proposal submission (UK, Canada and Australia)and OT guide star or image searches will fail, often with the error exception occurred while retrieving the Connection refused. This problem arises because PIT and OT currently do not support sites with an HTTP proxy(support is being added for the next public releases of PIT and OT).

There is a workaround for those using PIT and OT under Solaris or Linux operating systems. (If you are using Windows, please contact us as there may also be a solution). The Java Virtual Machine (JVM) on Solaris and Linux allows setting two system properties at runtime to indicate that HTTP access should go through an HTTP proxy server.

The two system properties are:

  • http.proxyHost -> The host name of the proxy machine
  • http.proxyPort -> The port used by the proxy host

By setting the site specific values for these two properties before starting PIT and OT, the access for posting the proposal and gathering WFS stars will go through the indicated proxy. You may find the name of  your proxy by looking in your web browser preferences.

A modified command for starting PIT would look like thefollowing (where the -D allows setting the system property on the command line):

exec java ${JFLAGS} -Dhttp.proxyHost="proxy host" -Dhttp.proxyPort="port"

23 October 2001 - only an issue for semester 2001B
Bugs in Phase I - to - Phase II skeleton conversion.In the translation of approved Phase I proposals to the XML skeletons for PhaseII several errors were introduced:

  • In some Science Programs no instrument component (NIRI or GMOS) was included in each observation, in others the instrument was included but with default parameters. In both cases the PIs should define the instrument configuration required for their observations.
  • The observing condition constraints often were incorrectly transcribed. The observing conditions included within the Phase I proposal summary element of the Phase II XML file are correct, but the conditions within each observation are wrong. PIs should check and, if necessary, correct the observation conditions. 

3 May 2001
In (first) public release OT1.0.0

  • Help-page tutorials are those from old OT
  • When WFS tags are deleted in the position editor they are correctly deleted from the (target component) target list but not from the offset iterator table

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