Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/~palfa/observing.notes/obslog.20060207.txt Дата изменения: Tue Feb 7 17:50:47 2006 Дата индексирования: Sun Apr 10 23:51:57 2016 Кодировка:

Hi All,

Below is a play by play summary of the observing run this past
week. My student Peter O'Malley and I were here on site for the whole
run, with Paulo helping out from time to time and Jason making all the
schedules. The schedule Jason made filled in the gaps between the
sparsely sampled pointings already done at low latitudes, so we should
have seen some good pulsar candidates. We found NO NEW PULSARS in the
quicklook processing. Only one CLASS1 candidate was found (and was not
confirmed) and we redetected 5 known pulsars. We did find a couple of
single pulse candidates, though (see below).

Froney



THU FEB 2, 2006 (MJD 53768):

Used stable version of CIMA for this run. Startup went smoothly, went
through all seven beams on bright pulsar to test system at start. Feed
rotations and offsets working fine. After 30 min of startup and
calibration, began observing. Observing went smoothly. RFI situation
was good, not too many birdies. Ended on time after 2.5 hours of
survey schedule time.

FRI FEB 3, 2006 (MJD 53769):

Smooth startup, tested on J1906. Began schedule observing after 15
min. Attempted a confirm of CLASS 1 candidate from yesterday. Pulsar
NOT confirmed. Schedule observed for rest of time, no problems.

SAT FEB 4, 2006 (MJD 53770):

Polarization A in Beam 0 is dead. Staff is aware of the
problem. Observing delayed 30 mins at start to take cover off ALFA
receiver and a re-do of the startup/calibration since amps weren't
on. Smooth sailing after that. Some RFI present in quicklook
candidates.

SUN FEB 5, 2006 (MJD 53771):

Delayed at start 30 mins to remove ALFA cover. Similar RFI as before,
but not too bad. Smooth observing until the end. Two good single pulse
candidates found: Candidate A is at same DM as J1901+0413 (which is
offset from this beam by 5.5 arcmin), but the pulsar did not show up
in prepfold. The other candidate (Candidate B) is in a different
pointing and is unknown. Will attempt confirmation tomorrow.

MON FEB 6, 2006 (MJD 53772)

Smooth start, no delay. Added two repeat pointings from yesterday to
confirm two single pulse candidates. Problems with ALFA rotator
part-way through -- it hung up during observing (usually it takes a
minute to think, but this was several minutes). After stopping obs,
resetting attenuators, and restarting obs, it was OK. Quicklook
processing also got hung up at the start. After killing and restarting
it all, it was OK. RFI is somewhat worse today (it swamped the
Candidate B confirmation observation). Ended observations
smoothly. Single pulse Candidate A seen again (the one near
J1901+0413), but again no periodicity found (for J1901+0413 or other
periods). Found a third single pulse candidate (Candidate C), but no
time for confirmation of this one during this session.

TUE FEB 7, 2006 (MJD 53773)

Dunc took over the session for some timing observations, so no survey
today. At the start we (Paulo and I and my student) did another
confirmation obs of single pulse Candidate B (the one that was swamped
yesterday).



Summary of single pulse candidates: The jury is still out on B and C,
but A seems to have been confirmed. If it is coming from J1901+0413,
it must be very strong since it is so far out of the beam. J1901+0413
also has a strong B field (1.9e13). I have placed the single pulse
plots in the candidates dir: http://www2.naic.edu/~palfa/candidates/
in case you want to see them. They are the ones dated 07-Feb-2006.