VRAD --> Velocity conversion in the cube?

[renovatio]

Dear all,

I have a cube which has ctype 3: VRAD. SO, when I create 1st moment or 0th moment, the result is not correct, because of the velocity taken as VRAD I think. ctype 3 should be in VELOCITY.

I think task 'regrid' handles this (it says so in the help file) but I could not figure it out which keyword actually does this. 

Any idea?

Thanks in advance!

best,

[Peter Teuben]

Maybe use puthd to change ctype3. Who created this cube?

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[melvyn wright]

Look at the image history to see where the VRAD comes from.
Where does the data come from ?

Melvyn

[renovatio]

Dear Melvyn and Peter,

First of all, many thanks for the quick reply.

These are not CARMA data, I have some additional data from PdBI. After creating the cleaned cube in GILDAS, I first convert them into fits file, then I convert them in Miriad format. I do all the analysis related to the moment maps etc in Miriad, which is faster, easier and powerful. I used PdBI data before for further analysis in Miriad and there was no such problem, but this time.

However, I converted the PdBI cube into Miriad cube again and now everything somehow seems ok. I really did not understand what happened and ctype 3 had the value of VRAD, but everything seems fine now and ctype 3 has 'velocity' as it should be. Moments maps therefore seem ok.

Many thanks again!



18 Mart 2013 Pazartesi 15:54:57 UTC tarihinde melvyn wright yazdı:

[Peter Teuben]

Perhaps GILDAS has changed, but since this is a path that may be taken by more,
I would think we (MIRIAD developers) should also recognize VRAD as an alias for VELOCITY