BB325BX / GCN 583861


GCN Report - Duration 300 s. Got IR detections.

Best XRT position:

RA (J2000): 12h 34m 5.22s Dec (J2000): +27d 57' 02.9"

With an uncertainty of 1.9 arcsec (radius, 90% confidence).

The results of the batgrbproduct analysis are available at

The results of the XRT-team automatic analysis are available at

NOT got an optical position: RA: 12:34:05.1 Dec: +27:57:02.6

with an uncertainty of 0.5''

Emailed analysis to set the NOT position as the phase center on 16 Jan 2014.


Requested not delete VFASTR 16 Jan 2014. Awaiting correlation.


V-FASTR data corrupted. The data contained lots of dropped packets which was raising lots of spurious candidates. From Adam Deller:
Someone thought this machine was just a file server and moved it away from the fast correlator switch to a different switch.  Hence, crap network performance and many dropped V-FASTR packets, I suspect.

I will email the analysts and ask if they can recorrelate BB325BX.  Hope the disk packs are still around.

Bad news - the packs were released on Friday.  So this dataset is a bust, sorry Keith.  Bad timing. 

So the V-FASTR data for this run is useless. The correlated data should be OK though.


According to the observing log, our obs started ~22 minutes after the BAT trigger. According to the XRT light curve, most of the action was missed by then.

Observers Log

Project:        BB325BX
Observer:       Bannister, K.
Project type:   VLBA
Obs filename:   bb325bxcrd.*
Date/Day:       2014JAN14/014
Ants Scheduled: SC HN NL FD LA PT KP OV BR MK

           Operator is Paul Padilla                                             
           UT1-UTC: -0.11, VClock: -0.033, GPS delta: 2.6                       
     1219  Begin                                                                
     1257  End.                                                                 

Downtime Summary:
   Total downtime : 0 min
   Percentage downtime of observing: 0.0%
   Average downtime per hour : 0.0 min

    Total scheduled observing time (# Antennas): 380 min (10)

    * = Entries where data was affected.
    % = Entries where data may have been affected.
    & = Entries where the site tech was called out.
  WEA = Weather entries.
  MF# = Maintenance form or major downtime category associated with a problem.
  %AD = The percentage of an antenna affected by a problem.
  AMD = Total antenna-minutes downtime for a problem.
 Tsys = System Temperature (TP/SP x Tcal/2)
  ACU = Antenna Control Unit
  FRM = Focus/Rotation Mount
  RFI = Radio Frequency Interference
  VME = Site control computer
   CB = Circuit Breaker
 vclock = Program that compares site clock time to a standard.

-- KeithBannister - 2014-01-15
Topic revision: r2 - 2014-02-03, KeithBannister
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