Äîêóìåíò âçÿò èç êýøà ïîèñêîâîé ìàøèíû. Àäðåñ îðèãèíàëüíîãî äîêóìåíòà : http://www.naic.edu/vscience/schedule/tpfiles/MomjiantagA2259tp.ps Äàòà èçìåíåíèÿ: Thu Aug 31 18:26:24 2006 Äàòà èíäåêñèðîâàíèÿ: Sat Dec 22 22:51:46 2007 Êîäèðîâêà: Ïîèñêîâûå ñëîâà: arp 220

Proposal Identification No.: A2259 Date Received: 2006­Aug­30 11:41:09
Technical Page
Proposal Type: Short
General Category: Astronomy
Sub­Category: Spectroscopy
Observation Category: Extragalactic
Total Time Requested: 3 Hours
Minimum Useful Time:
Proposal Title: HI and OH emission from ULIRG IRAS 23327+2913
ABSTRACT:
We request observing time to study the newly discovered, weak, OH megamaser and HI line emission from the
ULIRG IRAS 23327+2913. Contrary to advanced­merger ULIRGs such as Arp 220, IRAS 23327+2913 is a system
of two interacting galaxies separated by 0.2 arcmin. While its northern component is disturbed, the southern one
seems to be a normal, barred­spiral, galaxy. The proposed observations will be carried out simultaneously at the
red­shifted frequencies of the OH 18 cm mainline and the HI 21 cm transitions, to achieve a higher S/N ratio, and
better study the various HI and OH spectral features. By using a wider bandwidth, the observations will also allow
us to investigate the wide red­ and blue­shifted features of the OH megamaser emission, which were detected at
about 3 sigma. The Arecibo telescope, being the most sensitive in the world, is the only instrument that can enable
us to carry out follow­up observations on these weak HI and OH detections discovered by the 305­m telescope itself.
Name Institution E­mail Phone Student
Emmanuel Momjian NAIC­Arecibo Ob­
servatory
emomjian@naic.edu 787­878­2612 x
251
no
Remote Observing Request
X Observer will travel to AO
Remote Observing
In Absentia (instructions to oper­
ator)
Instrument Setup
L­wide
Atmospheric Observation Instruments:
Special Equipment or setup: none
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RFI Considerations
Frequency Ranges Planned
1275 ­ 1520
This proposal requires coordination with Punta Salinas radar within the band 1222­1381 MHz..
2