VEGAS Pulsar Project Meeting: 2015 March 16th 2:00 - 3:00pm ET

Room / Connection Details

• GB-137 / Soc 280
• 192.33.117.12##7144
• 434-817-6443

Housekeeping Details

• Main wiki page
• gbsapp Mailing List
• Location and regular date and time of meeting - agreed weekly on Mondays; GB-137 / Soc-280; 2-3pm ET
• ETK codes:
  • Electronics: 432510.GB3015
  • Software: 893252.GB3015
  • Science: 432540.GB3015

Resource Allocations

• Some of the electronics group intern Arindam Sengupta, to share tasks with Randy and Jason.

Present

• ??

Agenda

General Updates

• New BOF files
  • Status and summary page
    • Need to add "Priority" column
  • Status of Xilinx v4.16 testing?
  • Status of bug in fft block?
• Config tool: VEGAS pulsar specific keywords and dual GUPPI/VEGAS modes
  • Richard and Ryan still need to review and make sure no outstanding questions
• Manager
  • Ryan and Justin discussed and clarified some parameters
  • Justin estimates ~1--2 months to update Manager
• C-Band tests
  • Is timescale for Manager short enough to wait on this?

Discussion

• TOA periodicities in DIBAS BOF files
  • No sign of periodicities in Paul's test data from last year
  • No sign of periodicities in longer scans
  • Sam saw periodicities in coherent modes but at different frequencies
  • Ryan saw periodicities at same frequencies using a much different frequency for the AP
  • Jason believes the 10 MHz reference and 1 PPS are OK
  • Ryan, Sam, Jason, and Ray tested VEGAS hardware
    • Brief test showed periodicity at expected frequency
    • Seems to build up as more data added (expected) but possibly increases suddenly (see plots below)
  • Will try to test with GUPPI hardware

TOA periodicities from DIBAS BOF files

• Periodogram for first 51 scans

• Periodogram for all scans

• Power at 466 s period (average of 3 nearest bins)

Date / Time of Next Meeting

• ??