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Table 1

Details of RXTE observations of Her X-1 used for the pulse profile analysis.

Cycle Satellite Observed PP phase Calculated (O–C) (O–C) of Diff. btw. turn-on
no.1 turn-on +/– zero 2 +/– turn-on3 of turn-on PP phase zero and PP phase zero
(MJD) (days) (MJD) (days) (MJD) (days) (days) (sigma)
181 Ginga 47 642.20 0.20 47 642.13 0.11 47 637.87 4.33 4.26 0.31
252 RXTE 50 111.80 0.40 50 111.43 0.40 50 112.46  −0.66  −1.03 0.65
257 RXTE 50 285.90 0.20 50 285.46 0.20 50 286.73  −0.83  −1.27 1.56
259 RXTE 50 356.00 0.60 50 354.53 0.20 50 356.43  −0.43  −1.91 2.33
269 RXTE 50 704.90 0.20 50 704.27 0.20 50 704.97  −0.07  −0.70 2.24
271 RXTE 50 773.80 0.30 50 771.17 0.80 50 774.68  −0.88  −3.51 3.08
301 Beppo/SAX 51 826.40 0.50 51825.83 0.20 51820.28 6.12 5.55 1.06
303 RXTE 51 895.20 0.50 51 894.58 0.22 51 889.99 5.21 4.59 1.14
304 RXTE 51 929.10 0.50 51 929.43 0.50 51 924.84 4.26 4.59  −0.46
307 RXTE 52 032.00 0.50 52 031.37 0.21 52 029.40 2.60 1.97 1.16
308 RXTE 52 067.80 0.50 52 066.46 0.25 52 064.25 3.55 2.21 2.40
313 RXTE 52 243.05 0.50 52 243.04 0.06 52 238.52 4.53 4.52 0.02
319 RXTE 52 454.40 0.50 52 453.89 0.50 52 447.64 6.76 6.25 0.72
320 RXTE 52 489.20 0.50 52 488.73 0.50 52 482.49 6.71 6.23 0.67
323 RXTE 52 594.66 0.50 52 594.65 0.02 52 587.05 7.61 7.60 0.02
324 RXTE 52 630.50 0.50 52 629.48 0.50 52 621.91 8.59 7.57 1.44
340 RXTE 53 192.50 1.00 53 192.03 0.80 53 179.56 12.94 12.47 0.37
343 RXTE 53 296.80 0.50 53 297.17 0.80 53 284.12 12.68 13.04  −0.39
353 Suzaku 05 53 645.30 0.20 53 644.43 0.80 53 632.66 12.64 11.77 1.06
358 Suzaku 06 53 817.75 0.20 53 816.37 0.80 53 806.92 10.83 9.45 1.67
373 INTEGRAL 54 341.00 0.50 54 339.06 1.20 54 329.73 11.27 9.33 1.50

Notes. 

(1)

The numbering of 35 d cycles follows the convention introduced by Staubert et al. (1983): (O–C) = 0 for cycle no. 31 with turn-on near JD 2 442 410. See, however, Staubert et al. (2009) for the ambiguity of counting after the long anomalous low in 1999/2000 (AL3).

(2)

“PP phase zero” stands for: “pulse profile phase zero” (see text).

(3)

again: 20.5    ×    Porb is assumed as the period to calculate the expected turn-ons.

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