J0841+1311

Radio map

I have now made a first processing of the data from the 10 January observation of J0841+1311. I find no emission associated with the X-ray source at all: with a 3 arcsec FWHM beam, the flux density limit is 100 microJy at 8460 MHz (3 sigma).

8460 MHz map
8460-MHz map of field of J0841+1311 (PostScript: 145 kB)

Contours are -5, -4, -3, -2, -1, 1, 2, 3, ... 10 time 50 microJy. The source seen in the field is the NVSS source at 08:41:26.84, +13:12:07.1, which is now seen to be an asymmetric double (or possibly a core-jet source). No emission is seen from the neighbourhood of J0841+1311 (08:41:27.880, +13:11:08.13) itself.

I can hope to do slightly better with this map --- the data show some level of striping from poor data, sources that I have not correctly identified, and so on, but I doubt if the results will change much.

We should now concentrate on interpreting this radio faintness and X-ray brightness of the feature that John Silverman identified, and I also think that we should put an ApJ Letter together immediately: with John as first author, of course.

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Revised 12-Jan-2003 by Mark Birkinshaw