The middle-aged pulsar PSR J1741–2054 and its bow-shock nebula in the far-ultraviolet

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Table 2.

BSN photometry.

Region	Filter	A_s	A_bdg	C_tot	C_bgd	C_s	ℬ_s	⟨f_ν⟩	⟨I_ν⟩
0pt2.5ex		arcsec²	arcsec²	cnts/ks	cnts/ks	cnts/ks	$\frac{cnt}{{ks arcsec}^{2}}$ $\frac{\mathrm{cnt}}{\mathrm{ks\, arcsec}^2}$	nJy	$\frac{nJy}{{arcsec}^{2}}$ $\frac{\mathrm{nJy}}{\mathrm{arcsec^2}}$
0pt2.2exApex	F125LP	1.28	10.1	392	155,14	237,18	185,14	207,16	162,12
	F140LP	1.28	10.1	264	85,18	179,25	140,20	298,42	233,33
	b_high	1.28	6.9	201 900	190 000,1200	11 900,1200	9300,900	400,40	310,30
0pt3exFront	F125LP	20.2	68.1	4719	2502,28	2217,44	110,2	1940,40	96,2
	F140LP	20.2	68.1	2823	1422,63	1401,80	69,4	2340,130	116,7
0pt3exBack	F125LP	59.8	195	9406	7708,34	1698,46	28.4,0.8	1490,40	25,1
	F140LP	59.8	195	5568	4467,59	1101,74	18.4,1.2	1840,120	31,2
0pt3exBlob	F125LP	7.9	195	1597	1028,27	569,32	72,4	500,30	63,4
	F140LP	7.9	195	1018	590,38	428,47	54,6	710,80	90,10
0pt3exHalf	F125LP	142.7	292	24 722	18 356,103	6366,119	44.6,0.8	5570,100	39,1
	F140LP	142.7	292	14 530	10 590,108	3940,137	27.6,1.0	6570,230	46,2
0pt3exInterior	F125LP	105.1	267	16 596	13 546,78	3050,90	29.0,0.9	2670,80	25,1
	F140LP	105.1	267	9340	7823,91	1517,105	14.4,1.0	2530,180	24,2

Notes. A_s and A_bgd are the source extraction area and the background area for the BSN regions. ℬ_s = C_s/A_s is the average surface brightness of the BSN in a given region. ⟨I_ν⟩=⟨f_ν⟩/A_s is the average specific intensity.

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