ATNF VLBI Wiki

v255z

Description	Proper motion and Parallax of Methanol Masers: A search for infalling ga
Antennas	At-Hh-Ho-Mp-Cd-Wa
Start	274 20:00:00
Stop	275 22:00:00
PI	S.P. Ellingsen

Setup v255z.5cm-icrf: NIF=4

Station Modes	At Ho Mp Cd
Channel 1	`IFP#1-LO 6300 - 6316 MHz USB RCP`
Channel 2	`IFP#1-HI 6316 - 6332 MHz USB RCP`
Channel 3	`IFP#2-LO 6642 - 6658 MHz USB LCP`
Channel 4	`IFP#2-HI 6658 - 6674 MHz USB LCP`
DAS 1 Skyfreq	6316 & 6658 MHz
Bandwidth	16 MHz
DAS Mode	vsop.pro (telescope)

Station Modes	Hh Wa
Channel 1	`6300 - 6316 MHz USB RCP`
Channel 2	`6316 - 6332 MHz USB RCP`
Channel 3	`6642 - 6658 MHz USB LCP`
Channel 4	`6658 - 6674 MHz USB LCP`
Bandwidth	16 MHz
DAS Mode	Mark5

Setup v255z.5cm: NIF=2

Station Modes	At Ho Mp Cd
Channel 1	`IFP#1-LO 6642 - 6658 MHz USB RCP`
Channel 2	`IFP#1-HI 6658 - 6674 MHz USB RCP`
Channel 3	`IFP#2-LO 6642 - 6658 MHz USB LCP`
Channel 4	`IFP#2-HI 6658 - 6674 MHz USB LCP`
DAS 1 Skyfreq	6658 MHz
Bandwidth	16 MHz
DAS Mode	vsop.pro (telescope)

Station Modes	Hh Wa
Channel 1	`6642 - 6658 MHz USB RCP`
Channel 2	`6642 - 6658 MHz USB LCP`
Channel 3	`6658 - 6674 MHz USB RCP`
Channel 4	`6658 - 6674 MHz USB LCP`
Bandwidth	16 MHz
DAS Mode	Mark5

Mode changes:
274 20:00:00 v255z.5cm
274 22:05:00 v255z.5cm-icrf
274 23:00:30 v255z.5cm
275 03:00:30 v255z.5cm-icrf
275 03:45:30 v255z.5cm
275 08:30:30 v255z.5cm-icrf
275 09:15:30 v255z.5cm
275 13:20:00 v255z.5cm-icrf
275 15:45:00 v255z.5cm
275 19:08:00 v255z.5cm-icrf
275 19:52:00 v255z.5cm
275 21:53:00 v255z.5cm-icrf

Ftp: ftp://ftp.atnf.csiro.au/pub/people/vlbi/v255/v255z

Comments:

The purpose of these observations is to obtain an epoch of proper motion/parallax for G287.371, G291.274, G316.64, G316.84, G345.01, G345.00 and some observations of NGC6334F (which has shown an unusual flare).

The G287.371 observations should show a modest peak at a sky frequency of 6668.23 MHz. The G291.274 observations should show a modest peak at a sky frequency around 6669.82 MHz. The G316.64 and G316.84 observations should show a peak at a sky frequency of around 6668.54 and 6669.09 respectively, G345.01 and G345.00 should show peaks at sky frequencies of 6668.54 and 6668.57 MHz and NGC6334F should show a strong peak at 6668.32 MHz during these observations.

During the ICRF runs we have sometimes had to exclude certain antennas from observations of some sources in order to get a good spread of azimuths and elevations. Observing comments for each antenna:

Hobart, Ceduna :

The level into IF#1 will change significantly between the two setups. Set the level into the DAS so that it is within range for both setups. Setup the system temperature measurement so that it works for both IFs for the v255z.5cm setup. Please don't change the attenuation into the DAS when the setup changes as that may change the delay.