[daip] Regarding some help in AIPS tasks {External}

[egreisen]

On 2022-02-06 01:04, Soumen Bera via Daip wrote:
> Dear Sir,
> 
> My name is Soumen Bera, a student of Jadavpur University, Kolkata,
> India. Sir, I have the following queries.
> (i) I would like to know if the LoTSS DR1 image can be overlaid on the
> PanSTARRS-1 Image through the task 'kntr' in AIPS. I have already done
> the overlay of radio image on optical image e.g., VLA FIRST or NVSS or
> TGSS or LoTSS DR1 (radio image taken from their respective radio
> cutout site) on SDSS or DSS (image is taken from 'skyview' site) using
> the tasks 'hgeom' and 'kntr'. But for PanSTARRS-1 the 'hgeom' and
> 'kntr', is not happening.
> 
> (ii) Is it possible to change the background image colour (optical
> image), such a way the background optical sources will be visible? We
> have tried 'ofmfile 'rainbow'' task, but as it turns the whole plot
> into a colour plot and the contour line in black, it's not easy to
> trace the contour lines.
> 
> (iii) Is it possible to draw the contour lines in different colours
> other than black?
> 
>  Kindly help in this regard.
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To take your questions in reverse oder:

(iii) The adverb RGBLEVS may be used to color the contours in any way
       you like.  See HELP RGBLEVS for info about some ways to set
       the values.

(ii)  The adverb DODARK controls the switch between black and white
       contour lines.  That may help.  Note in LWPLA the pen width
       adverb LPEN which can be used to make the lines thicker and
       hence more visible.

(i)   Given that you have succeeded with many images, I wonder what
       can be wrong with PanSTARRS images.  I would need to see the
       IMHEADER for such an image after it is read into AIPS.  The
       phrase "is not happening" does not tell me much.

Eric Greisen