Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/~palfa/observing.notes/obslog.20050407.txt Дата изменения: Thu Apr 7 20:59:35 2005 Дата индексирования: Sun Apr 10 23:50:45 2016 Кодировка: Поисковые слова: http www.badastronomy.com phpbb index.php

Dear PALFA consortium members,

Today's observing session was remarkably low on both RFI and pulsar
candidates. We do not even have a re-detection to report, although the
test pulsar was detected normally in all beams.

Meanwhile, I've gone ahead and revised the PALFA web pages: log files
and documents are now somewhat more organized. Please take a look:
http://www.naic.edu/~palfa/
As of now, the SVN/ and MySQL/ directories and their contents are
redundant, with replicas in doc/. If the owners (Jason, David) agree,
those directories should be removed. I sheepishly confess that I
didn't use subversion to check in the files, but maybe all the web
pages should be checked in?

Observing logs (including this one) are now online as well.
Cheers,
Shami

----------- obslog.07apr05.txt ---------
P2030 Observing Notes, 7 Apr 2005, Ramesh Bhat and Shami Chatterjee

Observe B1933+16 (test) in each beam: okay.
Start catalog observing: 5:55 AST
Power levels start to dip on Galactic plane:
adjust power levels. This should be standard procedure?
Restart loop at 6:05 AST.

Processing:
Make a new mask based on stats from MJD 53445--53466, 2.5%
On aspmaster: cd realtime; ./makemask 53445 53466 2.5
= flags as RFI if more than 95 hits in processed beams
= 79 bins
Saved old mask as mask.quick.save-20050407

Non-detections:
G54.42+02.68.N_53467_0035; B1920+20 (3.5 arcmin away) is not seen.
P=1.172 sec, DM=203, s400=3.8, s600=1.4 => s1400~0.2 mJy?
Possibly sitting right in the null between beams?

G54.99+02.15.N_53467_0041; B1922+20 (8.6 arcmin away)
P=237.8 ms, DM=213, s400=4.0 => s1400~0.5 mJy?

Quicklook:
* The last two beams seem to hang unprocessed on realtime, with a
"copying to Node N" message stuck there. This happened on both
April 6 and 7.

Observing efficiency:
We've been getting to survey observations a bit earlier each day, but
can't do much better than today's 5:55 AST start time if we continue to
use B1933+16 as a test pulsar - that's unambiguously strong, but comes
up typically 8 minutes into the run. So 25 minutes to set up, slew, wait
for B1933, test in each beam, slew back, and begin surveying.

5:55->8:30 = 9300 secs, with 6885 secs of data = 74% efficiency.
Or 63% including setup and testing.

(End)