Notes on 3C_257

ISAAC:
3C257             H   900s        (15x6x10)    2005-04-18  Seeing ~1"
3C257             Js  1200s       (10x4x30)    2005-04-18  Seeing ~1"

*** it's source A!!! ***

confused by descrepancy between free fluxes and four band fluxes?
I think they are finding different sources, see images.
Will consult as to which is the real source.
(assuming it's source A for now)

channel           1            2            3            4
aper corr         1.13000      1.16800      1.15500      1.31600
RA               170.7881     170.7881     170.7881     170.7881
dec                5.5044       5.5044       5.5044       5.5044
distance          3.47123      3.47123      3.47123      3.47123
free fluxes       30.8840      34.7210      194.693      323.023
2 sigma           2.97215      4.88985      23.1311      28.9244
1=upperlimit      0.00000      0.00000      0.00000      0.00000
4band fluxes      30.8840      31.7720      16.3780      28.9380
errors            3.42600      3.51400      2.17400      3.31900

4band fluxes of sources nearby:
A = bright source east of radio position
B = next brightest source south of radio position
C = v faint source south or radio position

source	ra		dec		1	2	3	4
A	170.78920	5.50522		85.0	111	194	322
					(8.7)	(11)	(19)	(33)
B	170.78813	5.50445		30.9	31.8	-23	28.9
					(3.4)	(3.5)		(14.5)
C	170.78874	5.50351		18.4	22.5	27.5	28.1
					(2.3)	(2.9)	(11.6)	(14.5)

IRS:

one source at position of source A