WINERED specification and its sensitivity

Specification

WINERED
Parameters for telescopes
WINERED with Magellan
WINERED with NTT
WINERED with Araki

Plots

J-band limiting magnitudes for S/N=100
J-band limiting magnitudes for S/N=30
J-band limiting magnitudes with Magellan (FWHM=0.6sec)
J-band limiting magnitudes with Magellan (FWHM=1.0sec)
Effect of PSF FWHM on the Magellan limits
Reach within the Milky Way
Reach within the Local Group
Limits for quasars in Peth et al. (2011)

Required observation time

With Magellan (WIDE mode, 100um slit)
With Magellan (WIDE mode, 200um slit)
With NTT (WIDE mode, 100um slit)
With NTT (WIDE mode, 200um slit)
With Araki (WIDE mode, 100um slit)
With Araki (WIDE mode, 200um slit)

Links

Specification

WINERED

Mode	WIDE			HIRES-J
Resolution	28000	24000	18000	68000	58000	44000
Slit width [um]	100	140	200	100	140	200
Slit width [pixel]	2.0	2.8	4.0	2.0	2.8	4.0

Parameters for telescopes

Telescope	Magellan	NTT	Araki
Diameter [m]	6.5	3.58	1.3
Efficiency of telescope mirrors	0.73	0.73	0.73
Efficiency F ratio adjuster(s)	0.97	1	0.97
Occultation by the secondary (1=no occultation)	0.926	0.895	0.9
Pixel scale [arcsec]	0.15	0.27	0.8
Default seeing (or PSF FWHM) [arcsec]	1	1.4	3
Thermal background (Summer) [e-/pix/sec]	0.12	0.1	0.15
Thermal background (Winter) [e-/pix/sec]	0.08	0.1	0.07

WINERED with Magellan

Mode	WIDE			HIRES-J
Resolution	28000	24000	18000	68000	58000	44000
Slit width [um]	100	140	200	100	140	200
Slit width [pixel]	2.0	2.8	4.0	2.0	2.8	4.0
Slit width [arcsec]	0.30	0.42	0.60	0.30	0.42	0.60
Pixel scale [arcsec/pixel]	0.15
Slit length [arcsec]	9.00
Limit J mag (S/N=300)	12.76	13.24	13.81	11.52	11.99	12.56
Limit J mag (S/N=100)	14.47	14.91	15.43	13.20	13.64	14.16
Limit J mag (S/N=30)	15.97	16.40	16.90	14.69	15.11	15.61
Limit J mag (S/N=10)	17.22	17.66	18.15	15.93	16.37	16.85

WINERED with NTT

Mode	WIDE			HIRES-J
Resolution	28000	24000	18000	68000	58000	44000
Slit width [um]	100	140	200	100	140	200
Slit width [pixel]	2.0	2.8	4.0	2.0	2.8	4.0
Slit width [arcsec]	0.54	0.76	1.08	0.54	0.76	1.08
Pixel scale [arcsec/pixel]	0.27
Slit length [arcsec]	16.20
Limit J mag (S/N=300)	11.73	12.20	12.76	10.50	10.96	11.51
Limit J mag (S/N=100)	13.46	13.89	14.39	12.19	12.62	13.12
Limit J mag (S/N=30)	14.98	15.39	15.87	13.69	14.10	14.58
Limit J mag (S/N=10)	16.22	16.63	17.11	14.93	15.34	15.81

WINERED with Araki

Mode	WIDE			HIRES-J
Resolution	28000	24000	18000	68000	58000	44000
Slit width [um]	100	140	200	100	140	200
Slit width [pixel]	2.0	2.8	4.0	2.0	2.8	4.0
Slit width [arcsec]	1.60	2.24	3.20	1.60	2.24	3.20
Pixel scale [arcsec/pixel]	0.8
Slit length [arcsec]	48.00
Limit J mag (S/N=300)	9.91	10.36	10.89	8.68	9.13	9.64
Limit J mag (S/N=100)	11.75	12.17	12.63	10.49	10.90	11.36
Limit J mag (S/N=30)	13.33	13.73	14.16	12.05	12.44	12.87
Limit J mag (S/N=10)	14.61	14.99	15.43	13.32	13.70	14.13

The above limiting magnitudes (Vega mag) were calculated for integrations of 900 sec × 12 frames (3.0hr plus overheads). The ABBA nodding mode and the background for the Winter is assumed. Find parameters assumed for each telescope in the table below.

Plots

J-band limiting magnitudes for S/N=100

J-band limiting magnitudes for S/N=30

J-band limiting magnitudes with Magellan (FWHM=0.6sec)

J-band limiting magnitudes with Magellan (FWHM=1.0sec)

Effect of PSF FWHM on the Magellan limits

Reach within the Milky Way

Reach within the Local Group

Limits for quasars in Peth et al. (2011)

Required observation time

The following table indicates the required observation times for different magnitudes.

With Magellan (WIDE mode, 100um slit, seeing=1arcsec)

Jmag	S/N=300	S/N=100	S/N=30	S/N=10
J=5.0	6min (4s×2 → S/N=329)	5min (2s×2 → S/N=231)	5min (2s×2 → S/N=231)	5min (2s×2 → S/N=231)
J=5.5	6min (6s×2 → S/N=320)	5min (2s×2 → S/N=182)	5min (2s×2 → S/N=182)	5min (2s×2 → S/N=182)
J=6.0	6min (8s×2 → S/N=293)	5min (2s×2 → S/N=142)	5min (2s×2 → S/N=142)	5min (2s×2 → S/N=142)
J=6.5	6min (13s×2 → S/N=297)	5min (2s×2 → S/N=110)	5min (2s×2 → S/N=110)	5min (2s×2 → S/N=110)
J=7.0	6min (22s×2 → S/N=307)	5min (3s×2 → S/N=107)	5min (2s×2 → S/N=84)	5min (2s×2 → S/N=84)
J=7.5	6min (34s×2 → S/N=303)	6min (4s×2 → S/N=97)	5min (2s×2 → S/N=64)	5min (2s×2 → S/N=64)
J=8.0	7min (53s×2 → S/N=300)	6min (6s×2 → S/N=94)	5min (2s×2 → S/N=47)	5min (2s×2 → S/N=47)
J=8.5	8min (84s×2 → S/N=300)	6min (11s×2 → S/N=102)	5min (2s×2 → S/N=34)	5min (2s×2 → S/N=34)
J=9.0	10min (134s×2 → S/N=301)	6min (17s×2 → S/N=100)	5min (3s×2 → S/N=33)	5min (2s×2 → S/N=24)
J=9.5	12min (213s×2 → S/N=301)	6min (27s×2 → S/N=100)	6min (4s×2 → S/N=29)	5min (2s×2 → S/N=16)
J=10.0	17min (338s×2 → S/N=300)	7min (43s×2 → S/N=100)	6min (6s×2 → S/N=27)	5min (2s×2 → S/N=11)
J=10.5	23min (541s×2 → S/N=300)	8min (69s×2 → S/N=100)	6min (11s×2 → S/N=30)	5min (3s×2 → S/N=10)
J=11.0	34min (868s×2 → S/N=300)	9min (109s×2 → S/N=100)	6min (18s×2 → S/N=31)	6min (4s×2 → S/N=9)
J=11.5	53min (715s×4 → S/N=300)	11min (176s×2 → S/N=100)	6min (27s×2 → S/N=30)	6min (8s×2 → S/N=11)
J=12.0	1.4hr (792s×6 → S/N=300)	15min (287s×2 → S/N=100)	7min (43s×2 → S/N=30)	6min (11s×2 → S/N=10)
J=12.5	2.4hr (811s×10 → S/N=300)	21min (474s×2 → S/N=100)	8min (71s×2 → S/N=30)	6min (18s×2 → S/N=10)
J=13.0	4.1hr (887s×16 → S/N=300)	32min (797s×2 → S/N=100)	9min (116s×2 → S/N=30)	6min (29s×2 → S/N=10)
J=13.5	7.4hr (871s×30 → S/N=300)	55min (742s×4 → S/N=100)	12min (192s×2 → S/N=30)	7min (48s×2 → S/N=10)
J=14.0	10.2hr (900s×40 → S/N=254)	1.7hr (725s×8 → S/N=100)	16min (325s×2 → S/N=30)	8min (77s×2 → S/N=10)
J=14.5	10.2hr (900s×40 → S/N=178)	3.3hr (824s×14 → S/N=100)	24min (570s×2 → S/N=30)	10min (127s×2 → S/N=10)
J=15.0	10.2hr (900s×40 → S/N=122)	7.0hr (872s×28 → S/N=100)	46min (608s×4 → S/N=30)	12min (214s×2 → S/N=10)
J=15.5	10.2hr (900s×40 → S/N=82)	10.2hr (900s×40 → S/N=82)	1.5hr (831s×6 → S/N=30)	18min (373s×2 → S/N=10)
J=16.0	10.2hr (900s×40 → S/N=54)	10.2hr (900s×40 → S/N=54)	3.3hr (827s×14 → S/N=30)	28min (685s×2 → S/N=10)
J=16.5	10.2hr (900s×40 → S/N=35)	10.2hr (900s×40 → S/N=35)	7.6hr (896s×30 → S/N=30)	58min (780s×4 → S/N=10)
J=17.0	10.2hr (900s×40 → S/N=22)	10.2hr (900s×40 → S/N=22)	10.2hr (900s×40 → S/N=22)	2.2hr (764s×10 → S/N=10)
J=17.5	10.2hr (900s×40 → S/N=14)	10.2hr (900s×40 → S/N=14)	10.2hr (900s×40 → S/N=14)	5.1hr (888s×20 → S/N=10)
J=18.0	10.2hr (900s×40 → S/N=9)	10.2hr (900s×40 → S/N=9)	10.2hr (900s×40 → S/N=9)	10.2hr (900s×40 → S/N=9)
J=18.5	10.2hr (900s×40 → S/N=6)	10.2hr (900s×40 → S/N=6)	10.2hr (900s×40 → S/N=6)	10.2hr (900s×40 → S/N=6)
J=19.0	10.2hr (900s×40 → S/N=4)	10.2hr (900s×40 → S/N=4)	10.2hr (900s×40 → S/N=4)	10.2hr (900s×40 → S/N=4)

With Magellan (WIDE mode, 200um slit, seeing=1arcsec)

Jmag	S/N=300	S/N=100	S/N=30	S/N=10
J=5.0	5min (2s×2 → S/N=396)	5min (2s×2 → S/N=396)	5min (2s×2 → S/N=396)	5min (2s×2 → S/N=396)
J=5.5	5min (2s×2 → S/N=312)	5min (2s×2 → S/N=312)	5min (2s×2 → S/N=312)	5min (2s×2 → S/N=312)
J=6.0	5min (3s×2 → S/N=304)	5min (2s×2 → S/N=246)	5min (2s×2 → S/N=246)	5min (2s×2 → S/N=246)
J=6.5	6min (4s×2 → S/N=278)	5min (2s×2 → S/N=193)	5min (2s×2 → S/N=193)	5min (2s×2 → S/N=193)
J=7.0	6min (8s×2 → S/N=313)	5min (2s×2 → S/N=150)	5min (2s×2 → S/N=150)	5min (2s×2 → S/N=150)
J=7.5	6min (11s×2 → S/N=291)	5min (2s×2 → S/N=116)	5min (2s×2 → S/N=116)	5min (2s×2 → S/N=116)
J=8.0	6min (18s×2 → S/N=296)	5min (3s×2 → S/N=112)	5min (2s×2 → S/N=88)	5min (2s×2 → S/N=88)
J=8.5	6min (29s×2 → S/N=298)	6min (4s×2 → S/N=101)	5min (2s×2 → S/N=65)	5min (2s×2 → S/N=65)
J=9.0	7min (46s×2 → S/N=298)	6min (6s×2 → S/N=98)	5min (2s×2 → S/N=48)	5min (2s×2 → S/N=48)
J=9.5	8min (74s×2 → S/N=300)	6min (10s×2 → S/N=101)	5min (2s×2 → S/N=34)	5min (2s×2 → S/N=34)
J=10.0	9min (118s×2 → S/N=301)	6min (15s×2 → S/N=97)	5min (3s×2 → S/N=32)	5min (2s×2 → S/N=23)
J=10.5	12min (187s×2 → S/N=300)	6min (25s×2 → S/N=100)	6min (4s×2 → S/N=28)	5min (2s×2 → S/N=16)
J=11.0	15min (298s×2 → S/N=300)	7min (39s×2 → S/N=99)	6min (6s×2 → S/N=27)	5min (2s×2 → S/N=10)
J=11.5	21min (478s×2 → S/N=300)	8min (64s×2 → S/N=100)	6min (11s×2 → S/N=30)	6min (4s×2 → S/N=13)
J=12.0	31min (772s×2 → S/N=300)	9min (102s×2 → S/N=100)	6min (18s×2 → S/N=31)	6min (4s×2 → S/N=8)
J=12.5	49min (645s×4 → S/N=300)	11min (165s×2 → S/N=100)	6min (27s×2 → S/N=29)	6min (8s×2 → S/N=10)
J=13.0	1.3hr (725s×6 → S/N=300)	14min (270s×2 → S/N=100)	7min (45s×2 → S/N=30)	6min (13s×2 → S/N=11)
J=13.5	2.2hr (758s×10 → S/N=300)	20min (449s×2 → S/N=100)	8min (73s×2 → S/N=30)	6min (20s×2 → S/N=10)
J=14.0	3.9hr (849s×16 → S/N=300)	31min (765s×2 → S/N=100)	9min (118s×2 → S/N=30)	6min (32s×2 → S/N=10)
J=14.5	7.3hr (859s×30 → S/N=300)	55min (735s×4 → S/N=100)	12min (197s×2 → S/N=30)	7min (50s×2 → S/N=10)
J=15.0	10.2hr (900s×40 → S/N=252)	1.8hr (739s×8 → S/N=100)	17min (337s×2 → S/N=30)	8min (82s×2 → S/N=10)
J=15.5	10.2hr (900s×40 → S/N=174)	3.5hr (861s×14 → S/N=100)	25min (598s×2 → S/N=30)	10min (136s×2 → S/N=10)
J=16.0	10.2hr (900s×40 → S/N=117)	7.5hr (880s×30 → S/N=100)	49min (650s×4 → S/N=30)	13min (230s×2 → S/N=10)
J=16.5	10.2hr (900s×40 → S/N=77)	10.2hr (900s×40 → S/N=77)	1.7hr (723s×8 → S/N=30)	19min (405s×2 → S/N=10)
J=17.0	10.2hr (900s×40 → S/N=50)	10.2hr (900s×40 → S/N=50)	3.8hr (821s×16 → S/N=30)	30min (752s×2 → S/N=10)
J=17.5	10.2hr (900s×40 → S/N=32)	10.2hr (900s×40 → S/N=32)	8.8hr (865s×36 → S/N=30)	1.1hr (864s×4 → S/N=10)
J=18.0	10.2hr (900s×40 → S/N=21)	10.2hr (900s×40 → S/N=21)	10.2hr (900s×40 → S/N=21)	2.5hr (850s×10 → S/N=10)
J=18.5	10.2hr (900s×40 → S/N=13)	10.2hr (900s×40 → S/N=13)	10.2hr (900s×40 → S/N=13)	6.0hr (869s×24 → S/N=10)
J=19.0	10.2hr (900s×40 → S/N=8)	10.2hr (900s×40 → S/N=8)	10.2hr (900s×40 → S/N=8)	10.2hr (900s×40 → S/N=8)

With NTT (WIDE mode, 100um slit, seeing=1.4arcsec)

Jmag	S/N=300	S/N=100	S/N=30	S/N=10
J=5.0	6min (8s×2 → S/N=287)	5min (2s×2 → S/N=140)	5min (2s×2 → S/N=140)	5min (2s×2 → S/N=140)
J=5.5	6min (13s×2 → S/N=291)	5min (2s×2 → S/N=109)	5min (2s×2 → S/N=109)	5min (2s×2 → S/N=109)
J=6.0	6min (22s×2 → S/N=301)	5min (3s×2 → S/N=106)	5min (2s×2 → S/N=84)	5min (2s×2 → S/N=84)
J=6.5	6min (34s×2 → S/N=297)	6min (4s×2 → S/N=96)	5min (2s×2 → S/N=64)	5min (2s×2 → S/N=64)
J=7.0	7min (55s×2 → S/N=300)	6min (6s×2 → S/N=93)	5min (2s×2 → S/N=48)	5min (2s×2 → S/N=48)
J=7.5	8min (88s×2 → S/N=301)	6min (11s×2 → S/N=101)	5min (2s×2 → S/N=35)	5min (2s×2 → S/N=35)
J=8.0	10min (139s×2 → S/N=300)	6min (18s×2 → S/N=103)	5min (3s×2 → S/N=33)	5min (2s×2 → S/N=25)
J=8.5	13min (221s×2 → S/N=300)	6min (27s×2 → S/N=99)	6min (4s×2 → S/N=30)	5min (2s×2 → S/N=17)
J=9.0	17min (351s×2 → S/N=300)	7min (43s×2 → S/N=99)	6min (6s×2 → S/N=28)	5min (2s×2 → S/N=12)
J=9.5	24min (562s×2 → S/N=300)	8min (69s×2 → S/N=100)	6min (11s×2 → S/N=31)	5min (3s×2 → S/N=11)
J=10.0	36min (459s×4 → S/N=300)	9min (111s×2 → S/N=100)	6min (17s×2 → S/N=31)	6min (4s×2 → S/N=10)
J=10.5	55min (742s×4 → S/N=300)	11min (179s×2 → S/N=100)	6min (27s×2 → S/N=30)	6min (6s×2 → S/N=9)
J=11.0	1.5hr (819s×6 → S/N=300)	15min (293s×2 → S/N=100)	7min (43s×2 → S/N=30)	6min (11s×2 → S/N=10)
J=11.5	2.4hr (836s×10 → S/N=300)	21min (483s×2 → S/N=100)	8min (69s×2 → S/N=30)	6min (18s×2 → S/N=10)
J=12.0	4.2hr (817s×18 → S/N=300)	33min (817s×2 → S/N=100)	9min (112s×2 → S/N=30)	6min (27s×2 → S/N=10)
J=12.5	7.6hr (889s×30 → S/N=300)	56min (755s×4 → S/N=100)	12min (186s×2 → S/N=30)	7min (45s×2 → S/N=10)
J=13.0	10.2hr (900s×40 → S/N=252)	1.7hr (732s×8 → S/N=100)	16min (319s×2 → S/N=30)	8min (73s×2 → S/N=10)
J=13.5	10.2hr (900s×40 → S/N=177)	3.4hr (831s×14 → S/N=100)	24min (567s×2 → S/N=30)	9min (120s×2 → S/N=10)
J=14.0	10.2hr (900s×40 → S/N=122)	7.0hr (875s×28 → S/N=100)	46min (603s×4 → S/N=30)	12min (205s×2 → S/N=10)
J=14.5	10.2hr (900s×40 → S/N=82)	10.2hr (900s×40 → S/N=82)	1.5hr (829s×6 → S/N=30)	17min (362s×2 → S/N=10)
J=15.0	10.2hr (900s×40 → S/N=54)	10.2hr (900s×40 → S/N=54)	3.3hr (822s×14 → S/N=30)	28min (676s×2 → S/N=10)
J=15.5	10.2hr (900s×40 → S/N=35)	10.2hr (900s×40 → S/N=35)	7.6hr (891s×30 → S/N=30)	57min (773s×4 → S/N=10)
J=16.0	10.2hr (900s×40 → S/N=22)	10.2hr (900s×40 → S/N=22)	10.2hr (900s×40 → S/N=22)	2.1hr (896s×8 → S/N=10)
J=16.5	10.2hr (900s×40 → S/N=14)	10.2hr (900s×40 → S/N=14)	10.2hr (900s×40 → S/N=14)	5.0hr (883s×20 → S/N=10)
J=17.0	10.2hr (900s×40 → S/N=9)	10.2hr (900s×40 → S/N=9)	10.2hr (900s×40 → S/N=9)	10.2hr (900s×40 → S/N=9)
J=17.5	10.2hr (900s×40 → S/N=6)	10.2hr (900s×40 → S/N=6)	10.2hr (900s×40 → S/N=6)	10.2hr (900s×40 → S/N=6)
J=18.0	10.2hr (900s×40 → S/N=4)	10.2hr (900s×40 → S/N=4)	10.2hr (900s×40 → S/N=4)	10.2hr (900s×40 → S/N=4)
J=18.5	10.2hr (900s×40 → S/N=2)	10.2hr (900s×40 → S/N=2)	10.2hr (900s×40 → S/N=2)	10.2hr (900s×40 → S/N=2)
J=19.0	10.2hr (900s×40 → S/N=2)	10.2hr (900s×40 → S/N=2)	10.2hr (900s×40 → S/N=2)	10.2hr (900s×40 → S/N=2)

With NTT (WIDE mode, 200um slit, seeing=1.4arcsec)

Jmag	S/N=300	S/N=100	S/N=30	S/N=10
J=5.0	6min (4s×2 → S/N=340)	5min (2s×2 → S/N=238)	5min (2s×2 → S/N=238)	5min (2s×2 → S/N=238)
J=5.5	6min (4s×2 → S/N=268)	5min (2s×2 → S/N=187)	5min (2s×2 → S/N=187)	5min (2s×2 → S/N=187)
J=6.0	6min (8s×2 → S/N=302)	5min (2s×2 → S/N=146)	5min (2s×2 → S/N=146)	5min (2s×2 → S/N=146)
J=6.5	6min (13s×2 → S/N=306)	5min (2s×2 → S/N=113)	5min (2s×2 → S/N=113)	5min (2s×2 → S/N=113)
J=7.0	6min (20s×2 → S/N=301)	5min (3s×2 → S/N=109)	5min (2s×2 → S/N=86)	5min (2s×2 → S/N=86)
J=7.5	6min (32s×2 → S/N=303)	6min (4s×2 → S/N=99)	5min (2s×2 → S/N=65)	5min (2s×2 → S/N=65)
J=8.0	7min (50s×2 → S/N=300)	6min (6s×2 → S/N=96)	5min (2s×2 → S/N=47)	5min (2s×2 → S/N=47)
J=8.5	8min (80s×2 → S/N=301)	6min (11s×2 → S/N=104)	5min (2s×2 → S/N=34)	5min (2s×2 → S/N=34)
J=9.0	10min (126s×2 → S/N=300)	6min (17s×2 → S/N=102)	5min (3s×2 → S/N=32)	5min (2s×2 → S/N=24)
J=9.5	12min (200s×2 → S/N=300)	6min (26s×2 → S/N=100)	6min (4s×2 → S/N=28)	5min (2s×2 → S/N=16)
J=10.0	16min (321s×2 → S/N=300)	7min (41s×2 → S/N=99)	6min (6s×2 → S/N=27)	5min (2s×2 → S/N=11)
J=10.5	22min (514s×2 → S/N=300)	8min (67s×2 → S/N=101)	6min (11s×2 → S/N=30)	5min (3s×2 → S/N=10)
J=11.0	33min (830s×2 → S/N=300)	9min (106s×2 → S/N=100)	6min (18s×2 → S/N=31)	6min (4s×2 → S/N=9)
J=11.5	52min (691s×4 → S/N=300)	11min (172s×2 → S/N=100)	6min (27s×2 → S/N=30)	6min (8s×2 → S/N=11)
J=12.0	1.4hr (775s×6 → S/N=300)	15min (284s×2 → S/N=100)	7min (45s×2 → S/N=30)	6min (11s×2 → S/N=9)
J=12.5	2.4hr (808s×10 → S/N=300)	21min (474s×2 → S/N=100)	8min (72s×2 → S/N=30)	6min (18s×2 → S/N=10)
J=13.0	4.2hr (812s×18 → S/N=300)	32min (812s×2 → S/N=100)	9min (118s×2 → S/N=30)	6min (31s×2 → S/N=10)
J=13.5	7.8hr (859s×32 → S/N=300)	57min (775s×4 → S/N=100)	12min (199s×2 → S/N=30)	7min (49s×2 → S/N=10)
J=14.0	10.2hr (900s×40 → S/N=244)	1.8hr (775s×8 → S/N=100)	17min (344s×2 → S/N=30)	8min (81s×2 → S/N=10)
J=14.5	10.2hr (900s×40 → S/N=168)	3.7hr (810s×16 → S/N=100)	26min (621s×2 → S/N=30)	10min (134s×2 → S/N=10)
J=15.0	10.2hr (900s×40 → S/N=114)	8.0hr (877s×32 → S/N=100)	51min (674s×4 → S/N=30)	13min (230s×2 → S/N=10)
J=15.5	10.2hr (900s×40 → S/N=75)	10.2hr (900s×40 → S/N=75)	1.8hr (751s×8 → S/N=30)	19min (411s×2 → S/N=10)
J=16.0	10.2hr (900s×40 → S/N=49)	10.2hr (900s×40 → S/N=49)	3.9hr (856s×16 → S/N=30)	31min (780s×2 → S/N=10)
J=16.5	10.2hr (900s×40 → S/N=32)	10.2hr (900s×40 → S/N=32)	9.3hr (865s×38 → S/N=30)	1.2hr (661s×6 → S/N=10)
J=17.0	10.2hr (900s×40 → S/N=20)	10.2hr (900s×40 → S/N=20)	10.2hr (900s×40 → S/N=20)	2.6hr (885s×10 → S/N=10)
J=17.5	10.2hr (900s×40 → S/N=13)	10.2hr (900s×40 → S/N=13)	10.2hr (900s×40 → S/N=13)	6.3hr (850s×26 → S/N=10)
J=18.0	10.2hr (900s×40 → S/N=8)	10.2hr (900s×40 → S/N=8)	10.2hr (900s×40 → S/N=8)	10.2hr (900s×40 → S/N=8)
J=18.5	10.2hr (900s×40 → S/N=5)	10.2hr (900s×40 → S/N=5)	10.2hr (900s×40 → S/N=5)	10.2hr (900s×40 → S/N=5)
J=19.0	10.2hr (900s×40 → S/N=3)	10.2hr (900s×40 → S/N=3)	10.2hr (900s×40 → S/N=3)	10.2hr (900s×40 → S/N=3)

With Araki (WIDE mode, 100um slit, seeing=3arcsec)

Jmag	S/N=300	S/N=100	S/N=30	S/N=10
J=5.0	7min (50s×2 → S/N=298)	6min (6s×2 → S/N=99)	5min (2s×2 → S/N=52)	5min (2s×2 → S/N=52)
J=5.5	8min (81s×2 → S/N=301)	6min (10s×2 → S/N=102)	5min (2s×2 → S/N=39)	5min (2s×2 → S/N=39)
J=6.0	10min (127s×2 → S/N=299)	6min (15s×2 → S/N=98)	5min (3s×2 → S/N=38)	5min (2s×2 → S/N=28)
J=6.5	12min (202s×2 → S/N=300)	6min (25s×2 → S/N=101)	6min (4s×2 → S/N=33)	5min (2s×2 → S/N=20)
J=7.0	16min (321s×2 → S/N=300)	7min (39s×2 → S/N=100)	6min (6s×2 → S/N=32)	5min (2s×2 → S/N=14)
J=7.5	22min (513s×2 → S/N=300)	7min (62s×2 → S/N=100)	6min (8s×2 → S/N=28)	5min (3s×2 → S/N=13)
J=8.0	33min (817s×2 → S/N=300)	9min (99s×2 → S/N=100)	6min (13s×2 → S/N=29)	6min (4s×2 → S/N=11)
J=8.5	50min (662s×4 → S/N=300)	11min (158s×2 → S/N=100)	6min (22s×2 → S/N=30)	6min (6s×2 → S/N=11)
J=9.0	1.3hr (718s×6 → S/N=300)	14min (253s×2 → S/N=100)	6min (34s×2 → S/N=29)	6min (8s×2 → S/N=9)
J=9.5	2.1hr (882s×8 → S/N=300)	19min (410s×2 → S/N=100)	7min (56s×2 → S/N=30)	6min (13s×2 → S/N=10)
J=10.0	3.4hr (851s×14 → S/N=300)	28min (672s×2 → S/N=100)	8min (90s×2 → S/N=30)	6min (22s×2 → S/N=10)
J=10.5	5.9hr (859s×24 → S/N=300)	45min (595s×4 → S/N=100)	10min (147s×2 → S/N=30)	7min (36s×2 → S/N=10)
J=11.0	10.2hr (900s×40 → S/N=296)	1.3hr (705s×6 → S/N=100)	13min (243s×2 → S/N=30)	7min (57s×2 → S/N=10)
J=11.5	10.2hr (900s×40 → S/N=216)	2.3hr (787s×10 → S/N=100)	19min (412s×2 → S/N=30)	8min (92s×2 → S/N=10)
J=12.0	10.2hr (900s×40 → S/N=154)	4.4hr (855s×18 → S/N=100)	29min (720s×2 → S/N=30)	10min (151s×2 → S/N=10)
J=12.5	10.2hr (900s×40 → S/N=106)	9.1hr (886s×36 → S/N=100)	56min (749s×4 → S/N=30)	14min (256s×2 → S/N=10)
J=13.0	10.2hr (900s×40 → S/N=72)	10.2hr (900s×40 → S/N=72)	1.9hr (807s×8 → S/N=30)	20min (445s×2 → S/N=10)
J=13.5	10.2hr (900s×40 → S/N=48)	10.2hr (900s×40 → S/N=48)	4.1hr (892s×16 → S/N=30)	33min (815s×2 → S/N=10)
J=14.0	10.2hr (900s×40 → S/N=31)	10.2hr (900s×40 → S/N=31)	9.5hr (885s×38 → S/N=30)	1.2hr (683s×6 → S/N=10)
J=14.5	10.2hr (900s×40 → S/N=20)	10.2hr (900s×40 → S/N=20)	10.2hr (900s×40 → S/N=20)	2.6hr (894s×10 → S/N=10)
J=15.0	10.2hr (900s×40 → S/N=13)	10.2hr (900s×40 → S/N=13)	10.2hr (900s×40 → S/N=13)	6.3hr (853s×26 → S/N=10)
J=15.5	10.2hr (900s×40 → S/N=8)	10.2hr (900s×40 → S/N=8)	10.2hr (900s×40 → S/N=8)	10.2hr (900s×40 → S/N=8)
J=16.0	10.2hr (900s×40 → S/N=5)	10.2hr (900s×40 → S/N=5)	10.2hr (900s×40 → S/N=5)	10.2hr (900s×40 → S/N=5)
J=16.5	10.2hr (900s×40 → S/N=3)	10.2hr (900s×40 → S/N=3)	10.2hr (900s×40 → S/N=3)	10.2hr (900s×40 → S/N=3)
J=17.0	10.2hr (900s×40 → S/N=2)	10.2hr (900s×40 → S/N=2)	10.2hr (900s×40 → S/N=2)	10.2hr (900s×40 → S/N=2)
J=17.5	10.2hr (900s×40 → S/N=1)	10.2hr (900s×40 → S/N=1)	10.2hr (900s×40 → S/N=1)	10.2hr (900s×40 → S/N=1)
J=18.0	10.2hr (900s×40 → S/N=1)	10.2hr (900s×40 → S/N=1)	10.2hr (900s×40 → S/N=1)	10.2hr (900s×40 → S/N=1)
J=18.5	10.2hr (900s×40 → S/N=0)	10.2hr (900s×40 → S/N=0)	10.2hr (900s×40 → S/N=0)	10.2hr (900s×40 → S/N=0)
J=19.0	10.2hr (900s×40 → S/N=0)	10.2hr (900s×40 → S/N=0)	10.2hr (900s×40 → S/N=0)	10.2hr (900s×40 → S/N=0)

With Araki (WIDE mode, 200um slit, seeing=3arcsec)

Jmag	S/N=300	S/N=100	S/N=30	S/N=10
J=5.0	6min (20s×2 → S/N=304)	5min (3s×2 → S/N=112)	5min (2s×2 → S/N=89)	5min (2s×2 → S/N=89)
J=5.5	6min (31s×2 → S/N=300)	6min (4s×2 → S/N=102)	5min (2s×2 → S/N=68)	5min (2s×2 → S/N=68)
J=6.0	7min (50s×2 → S/N=303)	6min (6s×2 → S/N=99)	5min (2s×2 → S/N=51)	5min (2s×2 → S/N=51)
J=6.5	8min (78s×2 → S/N=300)	6min (10s×2 → S/N=101)	5min (2s×2 → S/N=37)	5min (2s×2 → S/N=37)
J=7.0	9min (123s×2 → S/N=299)	6min (15s×2 → S/N=98)	5min (3s×2 → S/N=35)	5min (2s×2 → S/N=26)
J=7.5	12min (197s×2 → S/N=301)	6min (25s×2 → S/N=101)	6min (4s×2 → S/N=31)	5min (2s×2 → S/N=18)
J=8.0	16min (312s×2 → S/N=300)	7min (39s×2 → S/N=100)	6min (6s×2 → S/N=30)	5min (2s×2 → S/N=12)
J=8.5	22min (498s×2 → S/N=300)	7min (62s×2 → S/N=100)	6min (10s×2 → S/N=31)	5min (3s×2 → S/N=12)
J=9.0	32min (797s×2 → S/N=300)	9min (99s×2 → S/N=100)	6min (15s×2 → S/N=30)	6min (4s×2 → S/N=10)
J=9.5	49min (651s×4 → S/N=300)	11min (160s×2 → S/N=100)	6min (25s×2 → S/N=31)	6min (6s×2 → S/N=10)
J=10.0	1.3hr (715s×6 → S/N=300)	14min (258s×2 → S/N=100)	7min (39s×2 → S/N=30)	6min (11s×2 → S/N=11)
J=10.5	2.1hr (891s×8 → S/N=300)	19min (421s×2 → S/N=100)	7min (62s×2 → S/N=30)	6min (17s×2 → S/N=10)
J=11.0	3.5hr (879s×14 → S/N=300)	29min (698s×2 → S/N=100)	9min (101s×2 → S/N=30)	6min (25s×2 → S/N=10)
J=11.5	6.3hr (849s×26 → S/N=300)	48min (637s×4 → S/N=100)	11min (165s×2 → S/N=30)	7min (41s×2 → S/N=10)
J=12.0	10.2hr (900s×40 → S/N=281)	1.4hr (777s×6 → S/N=100)	15min (276s×2 → S/N=30)	8min (67s×2 → S/N=10)
J=12.5	10.2hr (900s×40 → S/N=201)	2.6hr (895s×10 → S/N=100)	21min (474s×2 → S/N=30)	9min (109s×2 → S/N=10)
J=13.0	10.2hr (900s×40 → S/N=139)	5.4hr (854s×22 → S/N=100)	34min (847s×2 → S/N=30)	11min (180s×2 → S/N=10)
J=13.5	10.2hr (900s×40 → S/N=94)	10.2hr (900s×40 → S/N=94)	1.2hr (663s×6 → S/N=30)	16min (307s×2 → S/N=10)
J=14.0	10.2hr (900s×40 → S/N=63)	10.2hr (900s×40 → S/N=63)	2.4hr (840s×10 → S/N=30)	24min (547s×2 → S/N=10)
J=14.5	10.2hr (900s×40 → S/N=41)	10.2hr (900s×40 → S/N=41)	5.5hr (881s×22 → S/N=30)	47min (615s×4 → S/N=10)
J=15.0	10.2hr (900s×40 → S/N=26)	10.2hr (900s×40 → S/N=26)	10.2hr (900s×40 → S/N=26)	1.5hr (864s×6 → S/N=10)
J=15.5	10.2hr (900s×40 → S/N=17)	10.2hr (900s×40 → S/N=17)	10.2hr (900s×40 → S/N=17)	3.6hr (892s×14 → S/N=10)
J=16.0	10.2hr (900s×40 → S/N=11)	10.2hr (900s×40 → S/N=11)	10.2hr (900s×40 → S/N=11)	8.8hr (864s×36 → S/N=10)
J=16.5	10.2hr (900s×40 → S/N=7)	10.2hr (900s×40 → S/N=7)	10.2hr (900s×40 → S/N=7)	10.2hr (900s×40 → S/N=7)
J=17.0	10.2hr (900s×40 → S/N=4)	10.2hr (900s×40 → S/N=4)	10.2hr (900s×40 → S/N=4)	10.2hr (900s×40 → S/N=4)
J=17.5	10.2hr (900s×40 → S/N=3)	10.2hr (900s×40 → S/N=3)	10.2hr (900s×40 → S/N=3)	10.2hr (900s×40 → S/N=3)
J=18.0	10.2hr (900s×40 → S/N=2)	10.2hr (900s×40 → S/N=2)	10.2hr (900s×40 → S/N=2)	10.2hr (900s×40 → S/N=2)
J=18.5	10.2hr (900s×40 → S/N=1)	10.2hr (900s×40 → S/N=1)	10.2hr (900s×40 → S/N=1)	10.2hr (900s×40 → S/N=1)
J=19.0	10.2hr (900s×40 → S/N=1)	10.2hr (900s×40 → S/N=1)	10.2hr (900s×40 → S/N=1)	10.2hr (900s×40 → S/N=1)

compiled on 2018-08-15 11:01 (JST)

The calc_obstime version=20180815 was used for the values below.