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- Log onto arthur (username pulsar or any pulsar group account)
- Type defobs to get to the observing directory
- For a description of how to operate the menu type help psracq
menu
- If observations are still running, stop them (either by asking the
controller or from MENU) and close the current data file (from MENU)
- Rename the old observing list, usually to something of the
format fffmmmyy.dat, where fff is the frequency, mmm is the mon and yy is
the year. For example rename psrlist_1 600nov99.dat
- start MENU (by typing MENU)
- Go to Set observing parameters
- There should be an existing parameter file available for most
frequencies. To see a list of previous parameter files, press the
Do key and type list. (Wildcards are accepted eg list
*400*)
Some examples are given in
Sections A.1, A.2 and A.3. Press the Do key and
type recall 600timing or the appropriate file for your
frequency.
- If any parameters need changing, do so, then store them to a parameter
file of the same or a different name by pressing the Do key
and typing save 600timing (or any appropriate name). Finally
(not obligatory but useful) send the current parameters to the timing
program by pressing the Do key and enter key.
- Return to the menu front page and select Default parameter file,
change it to the name of your selected parameter file
and save it by pressing the
enter key. For example 600timing
- Make a new observing list. Either
- run slice on an existing observing list for that frequency. (check
with the old pulsarlist for all the - signs that you've
just removed !)
or
- type sched, give ``1'' for the
answer to the first question, choose the appropriate frequency at the
second question and accept the default for the last question. A text
file PSRLIST_1.DAT is created from an observing database
PULSAR_DBS.DAT and can be modified with your choice of editor
eg EDIT, EMACS or VILE (a vi emulator). Stick to the format
rigorously, and don't use TABS!
The database used by sched currently (oct 1999) needs a lot of work to
update it for all the new new Parkes
pulsars and name changes caused by the change to
offline pulsar ephemeris files. I'd recommend using slice for the
moment.
- The new observing list should be checked before use by typing
TESTPSRLIST. This will check whether an ephemeris file or
Source file is available for all the pulsars on the observing list. We
are now (Summer 1999) moving away from the use of VAX Source files
though these will still be accepted.
- The ephemeris files are located in PSREPHDIR. If TESTPSRLIST
cannot find an ephemeris file, check in this directory. It may be that
the ephemeris is stored under an alternative name.
- If a new or updated ephemeris file is needed, this should be tranferred
from the offline computers as follows:-
- Log into an offline computer, and find or create a suitable
.eph file.
- Copy this file to
/psrdata/timing/arthur_eph/ renaming it under the
following rules. Prefix the filename with a B or J
to show whether it is a B or J named pulsar, and in positive DEC
pulsars, change the plus to an underline symbol and capitalise the
.eph eg J1913_1007.EPH
- On Arthur, change to the pulsar ephemeris directory (set def
PSREPHDIR), ftp to an Offline machine and
get the new file from /psrdata/timing/arthur_eph/
- Rerun TESTPSRLIST.
- On rare occasions it may be necessary to bring across to ARTHUR, all the
current Offline ephemeris files. A script cat2arthur has
been built to pick them out, copy them to
/psrdata/timing/arthur_eph/ and rename them. The script
will go through all the timing data selecting an ephemeris file
for each pulsar. If available it will pick a file called
arthur.eph (especially useful for the Crab pulsar). If not
available it will pick, first psrav.eph, failing this,
pulsarname.eph and finally it will atempt to create a file from
the catalogue. The file will be given the pulsarname used in
the catalogue. (Pulsars not found in the catalogue cannot be
assigned a B or J and the filename will need to
changed when this is known.
- Finally log onto ARTHUR and get the new files with ftp.(Wild cards
accepted).
- If you have not already done so, you should complete Sections 2 to 6.
- Repeat steps 6-10 for msp timing using menu3. Some examples are
given in Sections B.1, B.2 and B.3.
- Finally you should observe a bright millisecond pulsar and check that you
see pulses.
Jon Bell
Sun Aug 17 17:32:08 BST 1997
Mod: Chris Jordan
21st Oct 1999