Table 1. Open in new tab Some...

Burst no.	MJD (TDB)	OBSID	Peak rate^a	Pre-burst rate^b	Rise time	Decay e-folding time
1	57936.584843	0050340108	1750 ± 60	226 ± 7	7.0	11.5
2	57937.615500	0050340109	2620 ± 80	272 ± 3	3.0	17.5
3	58441.896973	1050340117	3550 ± 90	845 ± 3	4.5	13.5
4	58442.801000	1050340118	3490 ± 90	571 ± 3	5.5	9.5
5	58442.932044	1050340118	3300 ± 90	581 ± 3	4.5	14.0
6	58444.845108	1050340120	2780 ± 80	396 ± 2	6.0	21.0
7	58444.978103	1050340120	2700 ± 80	386 ± 3	4.5	22.0
8	58446.319741	1050340122	3250 ± 80	356 ± 2	3.5	15.5
9	58447.182637	1050340123	3030 ± 80	283 ± 2	3.0	–^c
10	58447.686326	1050340123	2780 ± 90	233 ± 2	7.8	14.5
11	58447.949824	1050340123	2830 ± 90	231 ± 2	6.0	17.0
12	58448.526803	1050340124	2780 ± 90	216 ± 2	6.5	18.0
13	58930.162945	3050340101	2720 ± 80	325 ± 3	5.5	21.5
14	58930.735030	3050340101	2640 ± 80	349 ± 3	9.5	23.0
15	58934.487522	3050340105	2760 ± 80	367 ± 3	3.5	23.5
16	58934.493274	3050340105	1450 ± 60	369 ± 3	9.0	10.5
17	58934.807525	3050340105	2730 ± 80	387 ± 3	8.0	17.0
18	59085.311252	3050340111	8330 ± 130	385 ± 4	3.0	6.5
19	59091.838177	3050340117	2900 ± 80	443 ± 3	3.0	19.0
20	59127.285573	3050340142	5730 ± 130	2125 ± 60	2.0	9.0
21	59140.123223	3050340150	2110 ± 70	240 ± 2	3.5	10.0
22	59140.128449	3050340150	2820 ± 80	235 ± 2	5.0	9.0

Burst no.

MJD (TDB)

OBSID

Peak rate^a

Pre-burst rate^b

Rise time

Decay e-folding time

(counts s⁻¹)

(s)

57936.584843

0050340108

1750 ± 60

226 ± 7

7.0

11.5

57937.615500

0050340109

2620 ± 80

272 ± 3

3.0

17.5

58441.896973

1050340117

3550 ± 90

845 ± 3

4.5

13.5

58442.801000

1050340118

3490 ± 90

571 ± 3

5.5

9.5

58442.932044

1050340118

3300 ± 90

581 ± 3

4.5

14.0

58444.845108

1050340120

2780 ± 80

396 ± 2

6.0

21.0

58444.978103

1050340120

2700 ± 80

386 ± 3

4.5

22.0

58446.319741

1050340122

3250 ± 80

356 ± 2

3.5

15.5

58447.182637

1050340123

3030 ± 80

283 ± 2

3.0

–^c

58447.686326

1050340123

2780 ± 90

233 ± 2

7.8

14.5

58447.949824

1050340123

2830 ± 90

231 ± 2

6.0

17.0

58448.526803

1050340124

2780 ± 90

216 ± 2

6.5

18.0

58930.162945

3050340101

2720 ± 80

325 ± 3

5.5

21.5

58930.735030

3050340101

2640 ± 80

349 ± 3

9.5

23.0

58934.487522

3050340105

2760 ± 80

367 ± 3

3.5

23.5

58934.493274

3050340105

1450 ± 60

369 ± 3

9.0

10.5

58934.807525

3050340105

2730 ± 80

387 ± 3

8.0

17.0

59085.311252

3050340111

8330 ± 130

385 ± 4

3.0

6.5

59091.838177

3050340117

2900 ± 80

443 ± 3

3.0

19.0

59127.285573

3050340142

5730 ± 130

2125 ± 60

2.0

9.0

59140.123223

3050340150

2110 ± 70

240 ± 2

3.5

10.0

59140.128449

3050340150

2820 ± 80

235 ± 2

5.0

9.0

Burst no.	MJD (TDB)	OBSID	Peak rate^a	Pre-burst rate^b	Rise time	Decay e-folding time
1	57936.584843	0050340108	1750 ± 60	226 ± 7	7.0	11.5
2	57937.615500	0050340109	2620 ± 80	272 ± 3	3.0	17.5
3	58441.896973	1050340117	3550 ± 90	845 ± 3	4.5	13.5
4	58442.801000	1050340118	3490 ± 90	571 ± 3	5.5	9.5
5	58442.932044	1050340118	3300 ± 90	581 ± 3	4.5	14.0
6	58444.845108	1050340120	2780 ± 80	396 ± 2	6.0	21.0
7	58444.978103	1050340120	2700 ± 80	386 ± 3	4.5	22.0
8	58446.319741	1050340122	3250 ± 80	356 ± 2	3.5	15.5
9	58447.182637	1050340123	3030 ± 80	283 ± 2	3.0	–^c
10	58447.686326	1050340123	2780 ± 90	233 ± 2	7.8	14.5
11	58447.949824	1050340123	2830 ± 90	231 ± 2	6.0	17.0
12	58448.526803	1050340124	2780 ± 90	216 ± 2	6.5	18.0
13	58930.162945	3050340101	2720 ± 80	325 ± 3	5.5	21.5
14	58930.735030	3050340101	2640 ± 80	349 ± 3	9.5	23.0
15	58934.487522	3050340105	2760 ± 80	367 ± 3	3.5	23.5
16	58934.493274	3050340105	1450 ± 60	369 ± 3	9.0	10.5
17	58934.807525	3050340105	2730 ± 80	387 ± 3	8.0	17.0
18	59085.311252	3050340111	8330 ± 130	385 ± 4	3.0	6.5
19	59091.838177	3050340117	2900 ± 80	443 ± 3	3.0	19.0
20	59127.285573	3050340142	5730 ± 130	2125 ± 60	2.0	9.0
21	59140.123223	3050340150	2110 ± 70	240 ± 2	3.5	10.0
22	59140.128449	3050340150	2820 ± 80	235 ± 2	5.0	9.0

Table 1.

Open in new tab

Some characteristic properties of all the detected with NICER thermonuclear X-ray bursts from Aql X-1. Parameters are derived from 0.5 to 10.0 keV light curves with a time resolution of 0.5 s, therefore the uncertainties in the rise and decay times are 0.5 s.

Burst no.	MJD (TDB)	OBSID	Peak rate^a	Pre-burst rate^b	Rise time	Decay e-folding time
			(counts s⁻¹)	(counts s⁻¹)	(s)	(s)
1	57936.584843	0050340108	1750 ± 60	226 ± 7	7.0	11.5
2	57937.615500	0050340109	2620 ± 80	272 ± 3	3.0	17.5
3	58441.896973	1050340117	3550 ± 90	845 ± 3	4.5	13.5
4	58442.801000	1050340118	3490 ± 90	571 ± 3	5.5	9.5
5	58442.932044	1050340118	3300 ± 90	581 ± 3	4.5	14.0
6	58444.845108	1050340120	2780 ± 80	396 ± 2	6.0	21.0
7	58444.978103	1050340120	2700 ± 80	386 ± 3	4.5	22.0
8	58446.319741	1050340122	3250 ± 80	356 ± 2	3.5	15.5
9	58447.182637	1050340123	3030 ± 80	283 ± 2	3.0	–^c
10	58447.686326	1050340123	2780 ± 90	233 ± 2	7.8	14.5
11	58447.949824	1050340123	2830 ± 90	231 ± 2	6.0	17.0
12	58448.526803	1050340124	2780 ± 90	216 ± 2	6.5	18.0
13	58930.162945	3050340101	2720 ± 80	325 ± 3	5.5	21.5
14	58930.735030	3050340101	2640 ± 80	349 ± 3	9.5	23.0
15	58934.487522	3050340105	2760 ± 80	367 ± 3	3.5	23.5
16	58934.493274	3050340105	1450 ± 60	369 ± 3	9.0	10.5
17	58934.807525	3050340105	2730 ± 80	387 ± 3	8.0	17.0
18	59085.311252	3050340111	8330 ± 130	385 ± 4	3.0	6.5
19	59091.838177	3050340117	2900 ± 80	443 ± 3	3.0	19.0
20	59127.285573	3050340142	5730 ± 130	2125 ± 60	2.0	9.0
21	59140.123223	3050340150	2110 ± 70	240 ± 2	3.5	10.0
22	59140.128449	3050340150	2820 ± 80	235 ± 2	5.0	9.0

Burst no.	MJD (TDB)	OBSID	Peak rate^a	Pre-burst rate^b	Rise time	Decay e-folding time
			(counts s⁻¹)	(counts s⁻¹)	(s)	(s)
1	57936.584843	0050340108	1750 ± 60	226 ± 7	7.0	11.5
2	57937.615500	0050340109	2620 ± 80	272 ± 3	3.0	17.5
3	58441.896973	1050340117	3550 ± 90	845 ± 3	4.5	13.5
4	58442.801000	1050340118	3490 ± 90	571 ± 3	5.5	9.5
5	58442.932044	1050340118	3300 ± 90	581 ± 3	4.5	14.0
6	58444.845108	1050340120	2780 ± 80	396 ± 2	6.0	21.0
7	58444.978103	1050340120	2700 ± 80	386 ± 3	4.5	22.0
8	58446.319741	1050340122	3250 ± 80	356 ± 2	3.5	15.5
9	58447.182637	1050340123	3030 ± 80	283 ± 2	3.0	–^c
10	58447.686326	1050340123	2780 ± 90	233 ± 2	7.8	14.5
11	58447.949824	1050340123	2830 ± 90	231 ± 2	6.0	17.0
12	58448.526803	1050340124	2780 ± 90	216 ± 2	6.5	18.0
13	58930.162945	3050340101	2720 ± 80	325 ± 3	5.5	21.5
14	58930.735030	3050340101	2640 ± 80	349 ± 3	9.5	23.0
15	58934.487522	3050340105	2760 ± 80	367 ± 3	3.5	23.5
16	58934.493274	3050340105	1450 ± 60	369 ± 3	9.0	10.5
17	58934.807525	3050340105	2730 ± 80	387 ± 3	8.0	17.0
18	59085.311252	3050340111	8330 ± 130	385 ± 4	3.0	6.5
19	59091.838177	3050340117	2900 ± 80	443 ± 3	3.0	19.0
20	59127.285573	3050340142	5730 ± 130	2125 ± 60	2.0	9.0
21	59140.123223	3050340150	2110 ± 70	240 ± 2	3.5	10.0
22	59140.128449	3050340150	2820 ± 80	235 ± 2	5.0	9.0

Pre-burst count rates are subtracted.

Calculated as the average count rate 100 s prior to the burst start time. Uncertainties reflect the standard error of the average of all the count rates used.

Observation stops before the burst ends.

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