Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/~astro/sdss7/talks/HoPtalks/AO08.pdf Дата изменения: Tue Jul 16 19:39:38 2013 Дата индексирования: Sat Mar 1 04:52:02 2014 Кодировка: Поисковые слова: п п п п п п п п п п п п п п п п п п п

Investigating New Pulsars

Group A08:
Julia Deneva, Sarah Caudill, Steve Leiker, Natalia Lewandowska, Chris Thibodeau
Image Courtesy NASA


Analyzed Objects
Object Practice Pulsars J1713+0747 J2033+17 B1855+09 Arecibo (1993) Arecibo (1996) Arecibo (1986) Binary Binary Binary 15.99 25.08 13.3 4.57 5.95 5.362 Discovery Type DM Period (ms)

Newly Discovered Pulsars J1915+1149 J1802+03 J1933+17 PALFA Survey AO327 PALFA Survey TBD TBD TBD 699.504 77.27 156.6 TBD TBD TBD

Dispersion measure (DM) values were provided for the new pulsars. We attempted to identify each pulsar's period.


RFI Identification: J1915+1149
We used the PRESTO program rfifind to identify RFI.

Areas in red show masks where RFI is replaced with average values.


Blind Detection: J1802+03
We used the PRESTO program accelsearch to identify candidate periods.

We then ran prepfold for 100+ period candidates.

At DM=77.27, we identified a pulsar with P=664.29 ms


Difficult Detection: J1933+17
We could not identify this pulsar using a blind search for its period, or using its discovery period. The pulsar only emerged using a follow-up observation period. Discovery period: 0.02154061 ms Our period: 0.02150922 ms

в

. Binary!


Conclusions
Object J1915+1149 J1802+03 J1933+17 Discovery PALFA Survey AO327 PALFA Survey Type Isolated Isolated Binary DM 699.504 77.27 156.6 Discovery Period (ms) 100.04 664.2 21.54061 Analysis Period (ms) 100.04 664.29 21.50922

J1915+1149: Could not be detected. Needs further investigation. J1802+03: Easily detected with blind period search. J1933+17: Difficult to detect; found to be consistent with a binary system.


Big thanks to Julia Deneva, Fernando Camilo, Scott Ransom and Robert Minchin and all the Arecibo staff