Table 2. Open in new tab Observing log...

BHXB	Instrument	Date	On source	1σ WCS	Photometric	Limiting	Filter	Average
Swift J1539.2−6227	GROND	2017 Sep 15	372	130 ± 20	25.61 ± 0.06	<19.6	g′	2.2
			372	60 ± 20	26.34 ± 0.03	<20.1	r′	1.9
			372	50 ± 15	25.41 ± 0.06	<19.8	i′	1.8
			372	80 ± 15	25.18 ± 0.03	<18.9	z′	1.8
			480	125 ± 15	24.32 ± 0.05	<18.9	J	1.8
			480	340 ± 15	23.85 ± 0.07	<16.8	H	1.9
			480	50 ± 15	24.57 ± 0.05	<17.6	K_s	1.8
MAXI J1543−564	HAWK-I	2018 Apr 10	480	170 ± 15	27.56 ± 0.17	<23.2	H	0.5
			420	270 ± 15	27.31 ± 0.16	<23.2	K_s	0.5
XTE J1650−500	GROND	2017 Sep 14	372	100 ± 20	25.61 ± 0.06	<20.3	g′	2.0
			372	100 ± 20	26.34 ± 0.03	<20.5	r′	2.0
			372	60 ± 15	25.41 ± 0.06	<19.4	i′	1.9
			372	120 ± 15	25.18 ± 0.03	<18.5	z′	1.8
			480	50 ± 15	24.32 ± 0.05	<18.4	J	1.9
			480	60 ± 15	23.85 ± 0.07	<16.8	H	2.0
			480	40 ± 15	24.57 ± 0.05	<17.8	K_s	1.9
XTE J1726−476	PANIC	2006 Aug 3	900	100 ± 15	25.03 ± 0.24	< 20.7	J	0.7
			375	200 ± 15	25.38 ± 0.26	<17.9	K_s	0.6
IGR J17451−3022	LIRIS	2015 Apr 9*	360	110 ± 15	24.29 ± 0.09	<17.5	K_s	0.7
		2016 Mar 28	450	80 ± 15	24.41 ± 0.08	<17.7	K_s	0.8
Swift J174510.8−262411	LIRIS	2017 Apr 13	1600	100 ± 15	24.80 ± 0.05	<19.0	K_s	0.9
XTE J1752−223	LIRIS	2017 Apr 13	1600	40 ± 15	24.04 ± 0.07	<19.6	K_s	1.0
MAXI J1807+132	ACAM	2017 Jul 11	1800	120 ± 20	25.88 ± 0.05	<24.4	i′	1.3
XTE J1818−245	PANIC	2005 Sep 12*	450	80 ± 15	25.39 ± 0.01	<19.3	K_s	0.5
		2006 May 8	375	110 ± 15	25.62 ± 0.01	<17.6	K_s	0.6
MAXI J1828−249	MOSFIRE	2017 Jun 15	419	160 ± 15	27.41 ± 0.08	<21.9	K_s	1.1
MAXI J1836−194	MOSFIRE	2017 Jun 15	436	60 ± 15	27.51 ± 0.29	<22.2	K_s	1.1
XTE J1856+053	MOSFIRE	2017 Jun 15	436	50 ± 15	28.69 ± 0.25	<20.7	K_s	1.1
Swift J1910.2−0546	ACAM	2015 Jul 19	600	110 ± 15	26.25 ± 0.01	<22.4	i′	1.1
			600	150 ± 15	26.24 ± 0.01	<22.5	i′	1.2
			600	100 ± 15	26.39 ± 0.12	<23.6	r′	1.3
	LIRIS	2017 Apr 13	800	20 ± 15	24.68 ± 0.10	<22.1	K_s	0.8
MAXI J1957+032	MOSFIRE	2017 Jun 15	291	80 ± 15	27.63 ± 0.13	<23.3	K_s	0.9
XTE J2012+381	LIRIS	2017 Apr 13	2000	80 ± 15	24.67 ± 0.22	<21.5	K_s	0.8

BHXB

Instrument

Date

On source

1σ WCS

Photometric

Limiting

Filter

Average

candidate

observed

time

uncertainty^a

zero-point^b

magnitude^c

seeing

(s)

(mas)

(mag)

(arcsec)

Swift J1539.2−6227

GROND

2017 Sep 15

372

130 ± 20

25.61 ± 0.06

<19.6

g′

2.2

372

60 ± 20

26.34 ± 0.03

<20.1

r′

1.9

372

50 ± 15

25.41 ± 0.06

<19.8

i′

1.8

372

80 ± 15

25.18 ± 0.03

<18.9

z′

1.8

480

125 ± 15

24.32 ± 0.05

<18.9

1.8

480

340 ± 15

23.85 ± 0.07

<16.8

1.9

480

50 ± 15

24.57 ± 0.05

<17.6

K_s

1.8

MAXI J1543−564

HAWK-I

2018 Apr 10

480

170 ± 15

27.56 ± 0.17

<23.2

0.5

420

270 ± 15

27.31 ± 0.16

<23.2

K_s

0.5

XTE J1650−500

GROND

2017 Sep 14

372

100 ± 20

25.61 ± 0.06

<20.3

g′

2.0

372

100 ± 20

26.34 ± 0.03

<20.5

r′

2.0

372

60 ± 15

25.41 ± 0.06

<19.4

i′

1.9

372

120 ± 15

25.18 ± 0.03

<18.5

z′

1.8

480

50 ± 15

24.32 ± 0.05

<18.4

1.9

480

60 ± 15

23.85 ± 0.07

<16.8

2.0

480

40 ± 15

24.57 ± 0.05

<17.8

K_s

1.9

XTE J1726−476

PANIC

2006 Aug 3

900

100 ± 15

25.03 ± 0.24

< 20.7

0.7

375

200 ± 15

25.38 ± 0.26

<17.9

K_s

0.6

IGR J17451−3022

LIRIS

2015 Apr 9*

360

110 ± 15

24.29 ± 0.09

<17.5

K_s

0.7

2016 Mar 28

450

80 ± 15

24.41 ± 0.08

<17.7

K_s

0.8

Swift J174510.8−262411

LIRIS

2017 Apr 13

1600

100 ± 15

24.80 ± 0.05

<19.0

K_s

0.9

XTE J1752−223

LIRIS

2017 Apr 13

1600

40 ± 15

24.04 ± 0.07

<19.6

K_s

1.0

MAXI J1807+132

ACAM

2017 Jul 11

1800

120 ± 20

25.88 ± 0.05

<24.4

i′

1.3

XTE J1818−245

PANIC

2005 Sep 12*

450

80 ± 15

25.39 ± 0.01

<19.3

K_s

0.5

2006 May 8

375

110 ± 15

25.62 ± 0.01

<17.6

K_s

0.6

MAXI J1828−249

MOSFIRE

2017 Jun 15

419

160 ± 15

27.41 ± 0.08

<21.9

K_s

1.1

MAXI J1836−194

MOSFIRE

2017 Jun 15

436

60 ± 15

27.51 ± 0.29

<22.2

K_s

1.1

XTE J1856+053

MOSFIRE

2017 Jun 15

436

50 ± 15

28.69 ± 0.25

<20.7

K_s

1.1

Swift J1910.2−0546

ACAM

2015 Jul 19

600

110 ± 15

26.25 ± 0.01

<22.4

i′

1.1

600

150 ± 15

26.24 ± 0.01

<22.5

i′

1.2

600

100 ± 15

26.39 ± 0.12

<23.6

r′

1.3

LIRIS

2017 Apr 13

800

20 ± 15

24.68 ± 0.10

<22.1

K_s

0.8

MAXI J1957+032

MOSFIRE

2017 Jun 15

291

80 ± 15

27.63 ± 0.13

<23.3

K_s

0.9

XTE J2012+381

LIRIS

2017 Apr 13

2000

80 ± 15

24.67 ± 0.22

<21.5

K_s

0.8

BHXB	Instrument	Date	On source	1σ WCS	Photometric	Limiting	Filter	Average
Swift J1539.2−6227	GROND	2017 Sep 15	372	130 ± 20	25.61 ± 0.06	<19.6	g′	2.2
			372	60 ± 20	26.34 ± 0.03	<20.1	r′	1.9
			372	50 ± 15	25.41 ± 0.06	<19.8	i′	1.8
			372	80 ± 15	25.18 ± 0.03	<18.9	z′	1.8
			480	125 ± 15	24.32 ± 0.05	<18.9	J	1.8
			480	340 ± 15	23.85 ± 0.07	<16.8	H	1.9
			480	50 ± 15	24.57 ± 0.05	<17.6	K_s	1.8
MAXI J1543−564	HAWK-I	2018 Apr 10	480	170 ± 15	27.56 ± 0.17	<23.2	H	0.5
			420	270 ± 15	27.31 ± 0.16	<23.2	K_s	0.5
XTE J1650−500	GROND	2017 Sep 14	372	100 ± 20	25.61 ± 0.06	<20.3	g′	2.0
			372	100 ± 20	26.34 ± 0.03	<20.5	r′	2.0
			372	60 ± 15	25.41 ± 0.06	<19.4	i′	1.9
			372	120 ± 15	25.18 ± 0.03	<18.5	z′	1.8
			480	50 ± 15	24.32 ± 0.05	<18.4	J	1.9
			480	60 ± 15	23.85 ± 0.07	<16.8	H	2.0
			480	40 ± 15	24.57 ± 0.05	<17.8	K_s	1.9
XTE J1726−476	PANIC	2006 Aug 3	900	100 ± 15	25.03 ± 0.24	< 20.7	J	0.7
			375	200 ± 15	25.38 ± 0.26	<17.9	K_s	0.6
IGR J17451−3022	LIRIS	2015 Apr 9*	360	110 ± 15	24.29 ± 0.09	<17.5	K_s	0.7
		2016 Mar 28	450	80 ± 15	24.41 ± 0.08	<17.7	K_s	0.8
Swift J174510.8−262411	LIRIS	2017 Apr 13	1600	100 ± 15	24.80 ± 0.05	<19.0	K_s	0.9
XTE J1752−223	LIRIS	2017 Apr 13	1600	40 ± 15	24.04 ± 0.07	<19.6	K_s	1.0
MAXI J1807+132	ACAM	2017 Jul 11	1800	120 ± 20	25.88 ± 0.05	<24.4	i′	1.3
XTE J1818−245	PANIC	2005 Sep 12*	450	80 ± 15	25.39 ± 0.01	<19.3	K_s	0.5
		2006 May 8	375	110 ± 15	25.62 ± 0.01	<17.6	K_s	0.6
MAXI J1828−249	MOSFIRE	2017 Jun 15	419	160 ± 15	27.41 ± 0.08	<21.9	K_s	1.1
MAXI J1836−194	MOSFIRE	2017 Jun 15	436	60 ± 15	27.51 ± 0.29	<22.2	K_s	1.1
XTE J1856+053	MOSFIRE	2017 Jun 15	436	50 ± 15	28.69 ± 0.25	<20.7	K_s	1.1
Swift J1910.2−0546	ACAM	2015 Jul 19	600	110 ± 15	26.25 ± 0.01	<22.4	i′	1.1
			600	150 ± 15	26.24 ± 0.01	<22.5	i′	1.2
			600	100 ± 15	26.39 ± 0.12	<23.6	r′	1.3
	LIRIS	2017 Apr 13	800	20 ± 15	24.68 ± 0.10	<22.1	K_s	0.8
MAXI J1957+032	MOSFIRE	2017 Jun 15	291	80 ± 15	27.63 ± 0.13	<23.3	K_s	0.9
XTE J2012+381	LIRIS	2017 Apr 13	2000	80 ± 15	24.67 ± 0.22	<21.5	K_s	0.8

Table 2.

Open in new tab

Observing log of the BHXB candidates discussed in this paper. All of the sources are observed in quiescence. An (*) marks sources also observed in outburst.

BHXB	Instrument	Date	On source	1σ WCS	Photometric	Limiting	Filter	Average
candidate		observed	time	uncertainty^a	zero-point^b	magnitude^c		seeing
			(s)	(mas)	(mag)			(arcsec)
Swift J1539.2−6227	GROND	2017 Sep 15	372	130 ± 20	25.61 ± 0.06	<19.6	g′	2.2
			372	60 ± 20	26.34 ± 0.03	<20.1	r′	1.9
			372	50 ± 15	25.41 ± 0.06	<19.8	i′	1.8
			372	80 ± 15	25.18 ± 0.03	<18.9	z′	1.8
			480	125 ± 15	24.32 ± 0.05	<18.9	J	1.8
			480	340 ± 15	23.85 ± 0.07	<16.8	H	1.9
			480	50 ± 15	24.57 ± 0.05	<17.6	K_s	1.8
MAXI J1543−564	HAWK-I	2018 Apr 10	480	170 ± 15	27.56 ± 0.17	<23.2	H	0.5
			420	270 ± 15	27.31 ± 0.16	<23.2	K_s	0.5
XTE J1650−500	GROND	2017 Sep 14	372	100 ± 20	25.61 ± 0.06	<20.3	g′	2.0
			372	100 ± 20	26.34 ± 0.03	<20.5	r′	2.0
			372	60 ± 15	25.41 ± 0.06	<19.4	i′	1.9
			372	120 ± 15	25.18 ± 0.03	<18.5	z′	1.8
			480	50 ± 15	24.32 ± 0.05	<18.4	J	1.9
			480	60 ± 15	23.85 ± 0.07	<16.8	H	2.0
			480	40 ± 15	24.57 ± 0.05	<17.8	K_s	1.9
XTE J1726−476	PANIC	2006 Aug 3	900	100 ± 15	25.03 ± 0.24	< 20.7	J	0.7
			375	200 ± 15	25.38 ± 0.26	<17.9	K_s	0.6
IGR J17451−3022	LIRIS	2015 Apr 9*	360	110 ± 15	24.29 ± 0.09	<17.5	K_s	0.7
		2016 Mar 28	450	80 ± 15	24.41 ± 0.08	<17.7	K_s	0.8
Swift J174510.8−262411	LIRIS	2017 Apr 13	1600	100 ± 15	24.80 ± 0.05	<19.0	K_s	0.9
XTE J1752−223	LIRIS	2017 Apr 13	1600	40 ± 15	24.04 ± 0.07	<19.6	K_s	1.0
MAXI J1807+132	ACAM	2017 Jul 11	1800	120 ± 20	25.88 ± 0.05	<24.4	i′	1.3
XTE J1818−245	PANIC	2005 Sep 12*	450	80 ± 15	25.39 ± 0.01	<19.3	K_s	0.5
		2006 May 8	375	110 ± 15	25.62 ± 0.01	<17.6	K_s	0.6
MAXI J1828−249	MOSFIRE	2017 Jun 15	419	160 ± 15	27.41 ± 0.08	<21.9	K_s	1.1
MAXI J1836−194	MOSFIRE	2017 Jun 15	436	60 ± 15	27.51 ± 0.29	<22.2	K_s	1.1
XTE J1856+053	MOSFIRE	2017 Jun 15	436	50 ± 15	28.69 ± 0.25	<20.7	K_s	1.1
Swift J1910.2−0546	ACAM	2015 Jul 19	600	110 ± 15	26.25 ± 0.01	<22.4	i′	1.1
			600	150 ± 15	26.24 ± 0.01	<22.5	i′	1.2
			600	100 ± 15	26.39 ± 0.12	<23.6	r′	1.3
	LIRIS	2017 Apr 13	800	20 ± 15	24.68 ± 0.10	<22.1	K_s	0.8
MAXI J1957+032	MOSFIRE	2017 Jun 15	291	80 ± 15	27.63 ± 0.13	<23.3	K_s	0.9
XTE J2012+381	LIRIS	2017 Apr 13	2000	80 ± 15	24.67 ± 0.22	<21.5	K_s	0.8

BHXB	Instrument	Date	On source	1σ WCS	Photometric	Limiting	Filter	Average
candidate		observed	time	uncertainty^a	zero-point^b	magnitude^c		seeing
			(s)	(mas)	(mag)			(arcsec)
Swift J1539.2−6227	GROND	2017 Sep 15	372	130 ± 20	25.61 ± 0.06	<19.6	g′	2.2
			372	60 ± 20	26.34 ± 0.03	<20.1	r′	1.9
			372	50 ± 15	25.41 ± 0.06	<19.8	i′	1.8
			372	80 ± 15	25.18 ± 0.03	<18.9	z′	1.8
			480	125 ± 15	24.32 ± 0.05	<18.9	J	1.8
			480	340 ± 15	23.85 ± 0.07	<16.8	H	1.9
			480	50 ± 15	24.57 ± 0.05	<17.6	K_s	1.8
MAXI J1543−564	HAWK-I	2018 Apr 10	480	170 ± 15	27.56 ± 0.17	<23.2	H	0.5
			420	270 ± 15	27.31 ± 0.16	<23.2	K_s	0.5
XTE J1650−500	GROND	2017 Sep 14	372	100 ± 20	25.61 ± 0.06	<20.3	g′	2.0
			372	100 ± 20	26.34 ± 0.03	<20.5	r′	2.0
			372	60 ± 15	25.41 ± 0.06	<19.4	i′	1.9
			372	120 ± 15	25.18 ± 0.03	<18.5	z′	1.8
			480	50 ± 15	24.32 ± 0.05	<18.4	J	1.9
			480	60 ± 15	23.85 ± 0.07	<16.8	H	2.0
			480	40 ± 15	24.57 ± 0.05	<17.8	K_s	1.9
XTE J1726−476	PANIC	2006 Aug 3	900	100 ± 15	25.03 ± 0.24	< 20.7	J	0.7
			375	200 ± 15	25.38 ± 0.26	<17.9	K_s	0.6
IGR J17451−3022	LIRIS	2015 Apr 9*	360	110 ± 15	24.29 ± 0.09	<17.5	K_s	0.7
		2016 Mar 28	450	80 ± 15	24.41 ± 0.08	<17.7	K_s	0.8
Swift J174510.8−262411	LIRIS	2017 Apr 13	1600	100 ± 15	24.80 ± 0.05	<19.0	K_s	0.9
XTE J1752−223	LIRIS	2017 Apr 13	1600	40 ± 15	24.04 ± 0.07	<19.6	K_s	1.0
MAXI J1807+132	ACAM	2017 Jul 11	1800	120 ± 20	25.88 ± 0.05	<24.4	i′	1.3
XTE J1818−245	PANIC	2005 Sep 12*	450	80 ± 15	25.39 ± 0.01	<19.3	K_s	0.5
		2006 May 8	375	110 ± 15	25.62 ± 0.01	<17.6	K_s	0.6
MAXI J1828−249	MOSFIRE	2017 Jun 15	419	160 ± 15	27.41 ± 0.08	<21.9	K_s	1.1
MAXI J1836−194	MOSFIRE	2017 Jun 15	436	60 ± 15	27.51 ± 0.29	<22.2	K_s	1.1
XTE J1856+053	MOSFIRE	2017 Jun 15	436	50 ± 15	28.69 ± 0.25	<20.7	K_s	1.1
Swift J1910.2−0546	ACAM	2015 Jul 19	600	110 ± 15	26.25 ± 0.01	<22.4	i′	1.1
			600	150 ± 15	26.24 ± 0.01	<22.5	i′	1.2
			600	100 ± 15	26.39 ± 0.12	<23.6	r′	1.3
	LIRIS	2017 Apr 13	800	20 ± 15	24.68 ± 0.10	<22.1	K_s	0.8
MAXI J1957+032	MOSFIRE	2017 Jun 15	291	80 ± 15	27.63 ± 0.13	<23.3	K_s	0.9
XTE J2012+381	LIRIS	2017 Apr 13	2000	80 ± 15	24.67 ± 0.22	<21.5	K_s	0.8

Note. *Observation in outburst. ^aUncertainty with respect to the reference catalog. The first value is a statistical uncertainty, given by the starlink gaia tool, while the second value is a systematic uncertainty, and corresponds to the astrometric accuracy of the reference catalog (20 mas for UCAC4 and 15 mas for 2MASS). ^bPhotometric zero-point derived from the data with respect to the 2MASS catalogue, or VVV when possible, (for all the NIR sources), and the Pan-STARRS 1 catalogue (for the optical sources). ^cLimiting magnitude close to the position of the BHXB.

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