Proposal Identification No.: P2800 Date Received: 2012-Oct-08 11:39:54 Technical Page Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: We propose re-observing for an hour of lost time on pro ject P2676, observing pulsar B1937+21 with PUPPI at L-band. ... The first occurred during an in-person observing session when the entire system of PUPPI' s GPU nodes became non-responsive for a half hour during our scheduled time. ...

... 2.3 Data acquisition Spectra generated by the Multibeam correlator contain the usual structure seen in spectra from other H i instruments: a bandpass spectrum which is the sum of the sky , ground and receiver temperatures multiplied by the product of the filters in the receiver chain; superimposed on this is a noise ... Note also that sources extended much beyond ,40 arcmin can be imaged poorly in HIPASS images because of the bandpass sidelobe effect described in Section 3.3. ...