The Arecibo 430 MHz Intermediate Galactic Latitude Survey

This was a small pulsar survey conducted by the Caltech group from 1989 to 1991 using the 430-MHz line feed of the Arecibo 305-m telescope, in Puerto Rico, USA. It covered an area of 130 square degrees, and lead to the discovery of 9 pulsars, one of which (PSR J2016+1947) is in a binary system. The survey was eventually discontinued with the end of the Caltech pulsar group. Most of the results were eventually published as listed below.

IL beams shown as filled circles, known pulsars as hollow triangles and new pulsars as filled triangles. The total area covered is 130 square degrees.

News:

Nov. 2017: The timing solutions for J1756+1822, J2050+1259 plus the confirmation and timing of J2053+1718 have finally been published!
Note that the first two were first discovered by this survey in July 1990, 27 years ago, and confirmed in Jan. 2003.

Dec. 2011: Timing solution for PSR J2016+1947 (mistankenly printed as J2016+1948) is finally published and used to derive new limits on SEP violation.

Oct. 2004: Detection of unconfirmed 119-ms candidate from another similar survey (by Ray et al. 1996), PSR J2053+17, also ten years after first identification!

Early 2004: B1754+1820 and B2048+1250 have timing solutions: their new names are J1756+1822 and J2050+1259!

Jan. 2004: The only binary found in this survey, PSR J2016+1947, now has a timing solution! It meets all the criteria for SEP test. New SEP violation limits derived from this pulsar and PSR J0407+1607 are one order of magnitude more stringent than previous limits! (Talk by D. R. Lorimer and P. C. Freire presented at Aspen, Jan. 2004)

Sept. 2003: Survey paper published!

Jan. 2003: Detection of two previously unconfirmed candidates, ten years after their identification: B1754+1820 and B2048+1250!
Discovery of the periodic nulling of J1819+1305 (thank you, Desh!)

Sept. 2002: PSR J2016+1947 is one of the best known pulsars for testing the Strong Equivalence Principle (talk presented at the Fourth International Workshop on New Worlds in Astroparticle Physics, Faro, Portugal, Sept. 5-7 2002).

Sept. 2001: Edwards & Bailes independently re-discover one of the pulsars in this survey, PSR J1819+1305, and discover PSR J1837+1221, an unconfirmed ILS candidate.

September 7, 1991: Data taking for survey ends.

May 19, 1989: Data taking for survey starts.

The links below lead to pulse profiles for the newly discovered pulsars and for the calibrators observed. Each scan corresponds to a 67 second integration with the Arecibo telescope, at 430 MHz and with 8 MHz of bandwidth. The data was collected with the program XCORCHN using the 40 MHz correlator and analyzed with the Caltech pulsar package PSRPACK.

The data summary can be found here.

In 1998, the candidates were classified as confirmed or potential.
Known pulsars are classified as calibrators or rediscovered.
Click on any plot to see the full size version.
Comments and suggestions welcome.

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