Narrative:

[We were] on the VALRE3 arrival for hpn. Around basye were given traffic at our 9 position; intruder aircraft was also give our position. We had him in sight; and he also called us in sight. We were both at 3000 feet. In addition to us; another aircraft was passing below and between us opposite direction at about 2000 feet. Hpn was to our right; intruder to our left; about 3 miles. Seemed to be paralleling our course and then started to close in....at 2 miles we got a TA; noted his position and then we got an RA to climb. We climbed immediately; intruder aircraft passed left to right below us; about 300 feet below us toward hpn. We notified new york approach of the RA; resumed 3000 feet; and were cleared for the visual approach for hpn once we had the shoreline and the field in sight. Landed hpn normally.we believe the intruder aircraft did not have us in sight even though he called us in sight. We had him in sight the entire time. Intruder aircraft was given no further instruction to turn or take any evasive action even though he was on a converging path with us.given the time of night; the proximity of other aircraft ...it was probably not best to rely on visual separation; especially since it was very possible that he called out the other aircraft that passed between us in sight and actually didn't see us. Fortunately we were in VMC and could see very well but something happened in the communication with the intruder aircraft and there was enough time to warn him about the converging path he was making with us at our altitude. We were on a published arrival. The TCAS system gave us enough warning but this was a situation of bad situational awareness.

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Original NASA ASRS Text

Title: CRJ-700 First Officer reported an NMAC on arrival into HPN airport.

Narrative: [We were] on the VALRE3 arrival for HPN. Around BASYE were given traffic at our 9 position; intruder aircraft was also give our position. We had him in sight; and he also called us in sight. We were both at 3000 feet. In addition to us; another aircraft was passing below and between us opposite direction at about 2000 feet. HPN was to our right; intruder to our left; about 3 miles. Seemed to be paralleling our course and then started to close in....at 2 miles we got a TA; noted his position and then we got an RA to climb. We climbed immediately; intruder aircraft passed left to right below us; about 300 feet below us toward HPN. We notified New York Approach of the RA; resumed 3000 feet; and were cleared for the visual approach for HPN once we had the shoreline and the field in sight. Landed HPN normally.We believe the intruder aircraft did not have us in sight even though he called us in sight. We had him in sight the entire time. Intruder aircraft was given no further instruction to turn or take any evasive action even though he was on a converging path with us.Given the time of night; the proximity of other aircraft ...it was probably not best to rely on visual separation; especially since it was very possible that he called out the other aircraft that passed between us in sight and actually didn't see us. Fortunately we were in VMC and could see very well but something happened in the communication with the intruder aircraft and there was enough time to warn him about the converging path he was making with us at our altitude. We were on a published arrival. The TCAS system gave us enough warning but this was a situation of bad situational awareness.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.