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Flat/Arc Exposure Times

Recommended GCAL configurations and Exp. Times for GMOS calibrations:
Quartz Halogen flats and CuAr arcs

Last Revised May 2008

Note the following:

The choice of filter within GMOS is not considered except for IFU-2 configurations
The Readout is Slow and the Gain is Low and the three best amps were used for GCALflats
The GMOS-N and GMOS-S detector controllers only support integer exposure times
Only gratings R150, R400, and B600 are updated in the table
The B600 is not yet complete for 2.0 and 5.0 arcsec slits (use the values for R400 or consult your Gemini contact scientist)
For grating B1200 use 2x the Exp. Time for B600 listed for lambda=400-555nm
This table is still a work in progress, R600, R831 and B1200 will be added along with GMOS-S example spectra in the near future
We have started to quantify scattered light for the B600 grating. The other gratings (with the exception of the R150) also have significant scattered light. The B600 will be completed and examples for the other gratings will be added in a future version of the table.
The old calibration table is still available

GCALflats

All GCALflats are taken with

GCALlamp=Quartz-Halogen
GCALdiffuser=VISIBLE

Mirror (for mask imaging)
R150 Longslit / MOS and IFU
R400 Longslit / MOS and IFU
B600 Longslit / MOS and IFU
R600 Longslit / MOS and IFU
R831 Longslit / MOS and IFU
B1200 Longslit / MOS and IFU

**GCALflat configurations for Mirror (Mask Imaging)**
Slit / IFU	X,Y Binning	GCAL filter	Central Wavelength (nm)	Exp. Time (sec)	Peak Counts (GMOS-N)
Any	1x1	ND3.0	N/A	1

**GCALflat configurations for R150 Grating (Longslit or MOS)**
* Alternative Configuration (More counts Blueward of 650nm at significantly longer exposure times)
Slit Width	X,Y Binning	GCAL filter	Central Wavelength (nm)	Exp. Time (sec)	Peak Counts (GMOS-N)	Spectra (GMOS-N)
1.0arcsec	1x1	GMOS	700	3	35,000	700nm
	2x1,1x2	GMOS	700	1	23,000	700nm
	2x2,4x1,1x4	ND2.0	700	2	32,000	700nm
	2x4,4x2	ND2.0	700	1	32,000
	4x4	ND4.0	700	2	29,000	700nm
		ND4-5*	700	150	30,000	700nm
1.5arcsec	1x1	GMOS	700	2	34,000	700nm
	2x1,1x2	GMOS	700	1	34,000
	2x2,4x1,1x4	ND2.0	700	1	23,000	700nm
	2x4,4x2	ND3.0	700	1	38,000	700nm
		ND4-5*	700	200	29,000	700nm
	4x4	ND4.0	700	1	21,000	700nm
		ND4-5*	700	100	29,000	700nm
2.0arcsec	1x1	GMOS	700	1	23,000	700nm
	2x1,1x2	ND2.0	700	2	31,000	700nm
	2x2,4x1,1x4	ND2.0	700	1	32,000
	2x4,4x2	ND4.0	700	2	29,000	700nm
		ND4-5*	700	150	28,000	700nm
	4x4	ND4.0	700	1	29,000	700nm
		ND4-5*	700	75	28,000	700nm
5.0arcsec	1x1	ND2.0	700	2	39,000	700nm
	2x1,1x2	ND2.0	700	1	39,000	700nm
	2x2,4x1,1x4	ND4.0	700	2	36,000	700nm
		ND4-5*	700	150	34,000	700nm
	2x4,4x2	ND4.0	700	1	36,000	700nm
		ND4-5*	700	75	34,000	700nm
	4x4	ND4-5	700	38	35,000	700nm
0.75arcsec	1x1	GMOS	700	4	34,000	700nm
	2x1,1x2	GMOS	700	2	34,000	700nm
	2x2,1x4,4x1	GMOS	700	1	34,000
	2x4,4x2	ND2.0	700	1	23,000
	4x4	ND3.0	700	1	39,000	700nm
		ND4-5*	700	200	30,000	700nm
0.5arcsec	1x1	GMOS	700	6	34,000
	2x1,1x2	GMOS	700	3	35,000	700nm
	2x2,4x1,1x4	GMOS	700	1	22,000
	2x4,4x2	ND2.0	700	2	32,000
	4x4	ND2.0	700	1	32,000
0.25arcsec	1x1	GMOS	700	12	34,000
	2x1,1x2	GMOS	700	6	34,000
	2x2,4x1,1x4	GMOS	700	3	34,000
	2x4,4x2	GMOS	700	1	22,000
	4x4	ND2.0	700	2	32,000

**GCALflat configurations for R150 Grating (IFU)**
Note: It is not recommended to bin IFU spectra in the spatial direction
IFU	GMOS Filter	X,Y Binning	GCAL filter	Central Wavelength (nm)	Exp. Time (sec)	Peak Counts (GMOS-N)	Spectra (GMOS-N)
IFU-R	none	1x1	GMOS	700	44	38,000	not available
	none	2x1	GMOS	700	22	38,000
	none	4x1	GMOS	700	11	38,000
IFU-2	GG455	1x1	GMOS	725	48	38,000	not available
	GG455	2x1	GMOS	725	24	38,000
	GG455	4x1	GMOS	725	12	38,000

**GCALflat configurations for R400 Grating (Longslit or MOS)**
Slit Width	X,Y Binning	GCAL filter	Central Wavelength (nm)	Exp. Time (sec)	Peak Counts (GMOS-N)	Spectra (GMOS-N)
1.0arcsec	1x1	GMOS	500	10	45,000 (7800 cts @ 500 nm)	500nm
		GMOS	800	6	30,000	800nm
	2x1,1x2	GMOS	500	5	45,000 (7800 cts @ 500 nm)
		GMOS	800	3	30,000
	2x2,4x1,1x4	GMOS	500	2	36,000 (6300 cts @ 500 nm)	500nm
		GMOS	800	2	39,000	800nm
	2x4,4x2	GMOS	500	1	36,000 (6300 cts @ 500 nm)
		GMOS	800	1	39,000
	4x4	ND2.0	500	2	45,000 (3200 cts @ 500 nm)	500nm
		ND2.0	800	1	27,000	800nm
1.5arcsec	1x1	GMOS	500	6	40,000 (7000 cts @ 500nm)	500nm
		GMOS	800	4	30,000
	2x1,1x2	GMOS	500	3	40,000 (7000 cts @ 500nm)
		GMOS	800	2	30,000
	2x2,4x1,1x4	GMOS	500	1	27,000 (4200 cts @ 500nm)	500nm
		GMOS	800	1	30,000
	2x4,4x2	ND2.0	500	2	35,000 (2400 cts @ 500 nm)	500nm
		ND2.0	800	2	40,000	800nm
	4x4	ND2.0	500	1	35,000 (2400 cts @ 500 nm)	500nm
		ND2.0	800	1	40,000
2.0arcsec	1x1	GMOS	500	5	45,000 (7800 cts @ 500 nm)
		GMOS	800	3	30,000
	2x1,1x2	GMOS	500	2	36,000 (6300 cts @ 500 nm)
		GMOS	800	2	39,000	800nm
	2x2,4x1,1x4	GMOS	500	1	36,000 (6300 cts @ 500 nm)
		GMOS	800	1	39,000
	2x4,4x2	ND2.0	500	2	45,000 (3200 cts @ 500 nm)
		ND2.0	800	1	27,000
	4x4	ND2.0	500	1	47,000 (3300 cts @ 500 nm)	500nm
		ND4.0	800	2	27,000	800nm
5.0arcsec	1x1	GMOS	500	2	44,000 (7700 cts @ 500 nm)	500nm
		GMOS	800	1	22,000	800nm
	2x1,1x2	GMOS	500	1	44,000 (7700 cts @ 500 nm)
		ND2.0	800	2	32,000
	2x2,4x1,1x4	ND2.0	500	1	29,000 (2000 cts @ 500 nm)	500nm
		ND2.0	800	1	32,000	800nm
	2x4,4x2	ND3.0	500	2	55,000 (5200 cts @ 500 nm)
		ND4.0	800	2	34,000	800nm
	4x4	ND3.0	500	1	55,000 (5200 cts @ 500 nm)	500nm
		ND4.0	800	1	34,000
0.75arcsec	1x1	GMOS	500	13	44,000 (7600 cts @ 500 nm)
		GMOS	800	8	30,000
	2x1,1x2	GMOS	500	6	41,000 (7000 cts @ 500 nm)
		GMOS	800	4	30,000
	2x2,1x4,4x1	GMOS	500	3	41,000 (7000 cts @ 500 nm)
		GMOS	800	2	30,000
	2x4,4x2	GMOS	500	1	27,000 (4200 cts @ 500nm)
		GMOS	800	1	30,000
	4x4	ND2.0	500	2	35,000 (2400 cts @ 500 nm)
		ND2.0	800	2	40,000
0.5arcsec	1x1	GMOS	500	20	45,000 (7800 cts @ 500 nm)
		GMOS	800	12	30,000
	2x1,1x2	GMOS	500	10	45,000 (7800 cts @ 500 nm)
		GMOS	800	6	30,000
	2x2,4x1,1x4	GMOS	500	5	45,000 (7800 cts @ 500 nm)
		GMOS	800	3	30,000
	2x4,4x2	GMOS	500	2	36,000 (6300 cts @ 500 nm)
		GMOS	800	2	39,000
	4x4	GMOS	500	1	36,000 (6300 cts @ 500 nm)
		GMOS	800	1	39,000
0.25arcsec	1x1	GMOS	500	40	45,000 (7800 cts @ 500 nm)
		GMOS	800	24	30,000
	2x1,1x2	GMOS	500	20	45,000 (7800 cts @ 500 nm)
		GMOS	800	12	30,000
	2x2,4x1,1x4	GMOS	500	10	45,000 (7800 cts @ 500 nm)
		GMOS	800	6	30,000
	2x4,4x2	GMOS	500	5	45,000 (7800 cts @ 500 nm)
		GMOS	800	3	30,000
	4x4	GMOS	500	2	36,000 (6300 cts @ 500 nm)
		GMOS	800	2	39,000

**GCALflat configurations for R400 Grating (IFU)**
Note: It is not recommended to bin IFU spectra in the spatial direction
IFU	GMOS Filter	X,Y Binning	GCAL filter	Central Wavelength (nm)	Exp. Time (sec)	Peak Counts (GMOS-N)	Spectra (GMOS-N)
IFU-R	none	1x1	GMOS	500	120	39,000 (4700 cts @ 500 nm)	500nm
	none		GMOS	800	90	35,000	800nm
	none	2x1	GMOS	500	60	39,000 (4700 cts @ 500 nm)
	none		GMOS	800	45	35,000
	none	4x1	GMOS	500	30	39,000 (4700 cts @ 500 nm)
	none		GMOS	800	23	35,000
IFU-2	g	1x1	GMOS	475	240	15,000 (3000 cts @ 475 nm)	475nm
	g	2x1	GMOS	475	120	15,000 (3000 cts @ 475 nm)
	g	4x1	GMOS	475	60	15,000 (3000 cts @ 475 nm)
	r	1x1	GMOS	630	140	44,000	630nm
	r	2x1	GMOS	630	70	44,000
	r	4x1	GMOS	630	35	44,000
	i	1x1	GMOS	780	120	35,000	780nm
	i	2x1	GMOS	780	60	35,000
	i	4x1	GMOS	780	30	35,000
	z	1x1	GMOS	935	120	32,000	935nm
	z	2x1	GMOS	935	60	32,000
	z	4x1	GMOS	935	30	32,000

**GCALflat configurations for B600 Grating (Longslit or MOS)**
GCALflat spectrum dominated by scattered light blueward of 400nm (shown in red)
GCAL ND filters give more scattered light than GMOS balance filter
Slit Width	X,Y Binning	GCAL filter	Central Wavelength (nm)	Exp. Time (sec)	Peak Counts (GMOS-N)	Spectra (GMOS-N)
1.0arcsec	1x1	GMOS	400	16	36,000 (9000 cts @ 400 nm)	400nm (scattered light in r+i+z filters)
		GMOS	500	12	34,000	500nm (scattered light in i+z filters)
		GMOS	600	12	33,000	600nm
		GMOS	700	12	31,000	700nm
		ND2.0	800	48	37,000	800nm
		GMOS	900	20	34,000	900nm (second order / scattered light in g+r filters)
	2x1,1x2	GMOS	400	8	36,000 (9000 cts @ 400 nm)
		GMOS	500	6	34,000
		GMOS	600	6	33,000
		GMOS	700	6	31,000
		ND2.0	800	24	37,000
		GMOS	900	10	34,000
	2x2,4x1,1x4	GMOS	400	4	36,000 (9000 cts @ 400 nm)
		GMOS	500	3	34,000
		GMOS	600	3	33,000
		GMOS	700	3	31,000
		ND2.0	800	12	37,000
		GMOS	900	5	34,000
	2x4,4x2	GMOS	400	2	36,000 (9000 cts @ 400 nm)
		GMOS	500	1	22,000	500nm (scattered light in i+z filters)
		GMOS	600	1	22,000	600nm
		GMOS	700	1	20,000	700nm
		ND2.0	800	6	37,000
		GMOS	900	3	40,000	900nm (second order / scattered light in g+r filters)
	4x4	GMOS	400	1	36,000 (9000 cts @ 400 nm)
		ND2.0	500	3	29,000 (7300 cts @ 500 nm)	500nm (scattered light in i+z filters)
		ND2.0	600	3	40,000	600nm (scattered light in z filter)
		ND2.0	700	3	40,000	700nm
		ND2.0	800	3	37,000
		GMOS	900	1	27,000	900nm (second order / scattered light in g+r filters)
1.5arcsec	1x1	GMOS	400	12	40,000 (10,000 cts @ 400 nm)	400nm (scattered light in i+z filters)
		GMOS	500	8	34,000	500nm
		GMOS	600	8	33,000	600nm
		GMOS	700	8	30,000	700nm
		ND2.0	800	32	36,000	800nm
		GMOS	900	16	40,000	900nm
	2x1,1x2	GMOS	400	6	40,000 (10,000 cts @ 400 nm)
		GMOS	500	4	34,000
		GMOS	600	4	33,000
		GMOS	700	4	30,000
		ND2.0	800	16	36,000
		GMOS	900	8	40,000
	2x2,4x1,1x4	GMOS	400	3	40,000 (10,000 cts @ 400 nm)
		GMOS	500	2	34,000
		GMOS	600	2	33,000
		GMOS	700	2	30,000
		ND2.0	800	8	36,000
		GMOS	900	4	40,000
	2x4,4x2	GMOS	400	1	26,000 (6600 cts @ 400 nm)	400nm (scattered light in i+z filters)
		GMOS	500	1	34,000
		GMOS	600	1	33,000
		GMOS	700	1	30,000
		ND2.0	800	4	36,000
		GMOS	900	2	40,000
	4x4	ND2.0	400	7	40,000 (24,000 cts @ 400 nm)	400nm (scattered light in r+i+z filters)
		ND2.0	500	3	42,000 (11,00 cts @ 500 nm)	500nm (scattered light in i+z filters)
		ND2.0	600	2	39,000	600nm (scattered light in z filter)
		ND2.0	700	2	38,000	700nm
		ND2.0	800	2	36,000
		GMOS	900	1	40,000
2.0arcsec	1x1	GMOS	400	8	36,000 (9000 cts @ 400 nm)	not available
		GMOS	500	6	34,000	not available
		GMOS	600	6	33,000	not available
		GMOS	700	6	31,000	not available
		ND2.0	800	24	37,000	not available
		GMOS	900	10	34,000	not available
	2x1,1x2	GMOS	400	4	36,000 (9000 cts @ 400 nm)
		GMOS	500	3	34,000
		GMOS	600	3	33,000
		GMOS	700	3	31,000
		ND2.0	800	12	37,000
		GMOS	900	5	34,000
	2x2,4x1,1x4	GMOS	400	2	36,000 (9000 cts @ 400 nm)
		GMOS	500	1	22,000	not available
		GMOS	600	1	22,000	not available
		GMOS	700	1	20,000	not available
		ND2.0	800	6	37,000
		GMOS	900	3	40,000	not available
	2x4,4x2	GMOS	400	1	36,000 (9000 cts @ 400 nm)
		ND2.0	500	3	29,000 (7300 cts @ 500 nm)	not available
		ND2.0	600	3	40,000	not available
		ND2.0	700	3	40,000	not available
		ND2.0	800	3	37,000
		GMOS	900	1	27,000
	4x4	ND2.0	400	4		not available
		ND2.0	500	1		not available
		ND2.0	600	1		not available
		ND2.0	700	1		not available
		ND2.0	800	1	24,000	800nm
		ND2.0	900	2		not available
5.0arcsec	1x1	GMOS	400	3		not available
		GMOS	500	3	42,000	500nm scattered light in i+z filters
		GMOS	600	3		not available
		GMOS	700	3		not available
		ND2.0	800	10		not available
		GMOS	900	5		not available
	2x1,1x2	GMOS	400	1		not available
		GMOS	500	1		not available
		GMOS	600	1		not available
		GMOS	700	1		not available
		ND2.0	800	5
		GMOS	900	2		not available
	2x2,4x1,1x4	ND2.0	400	4		not available
		ND2.0	500	3		not available
		ND2.0	600	2		not available
		ND2.0	700	2		not available
		ND2.0	800	2		not available
		GMOS	900	1
	2x4,4x2	ND2.0	400	2
		ND2.0	500	1		not available
		ND2.0	600	1
		ND2.0	700	1
		ND2.0	800	1
		ND2.0	900	2		not available
	4x4	ND2.0	400	1
		ND3.0	500	1		not available
		ND3.0	600	1		not available
		ND4.0	700	3		not available
		ND4.0	800	3	38,000	800nm
		ND2.0	900	1
0.75arcsec	1x1	GMOS	400	24	41,000 (11,000 cts @ 400 nm)	400nm (scattered light in i+z filters)
		GMOS	500	16	34,000	500nm
		GMOS	600	16	33,000	600nm
		GMOS	700	16	31,000	700nm
		ND2.0	800	64	37,000	800nm
		GMOS	900	32	40,000	900nm
	2x1,1x2	GMOS	400	12	41,000 (11,000 cts @ 400 nm)
		GMOS	500	8	34,000
		GMOS	600	8	33,000
		GMOS	700	8	31,000
		ND2.0	800	32	37,000
		GMOS	900	16	40,000
	2x2,1x4,4x1	GMOS	400	6	41,000 (11,00 cts @ 400 nm)
		GMOS	500	4	34,000
		GMOS	600	4	33,000
		GMOS	700	4	31,000
		ND2.0	800	16	37,000
		GMOS	900	8	40,000
	2x4,4x2	GMOS	400	3	41,000 (11,000 cts @ 400 nm)
		GMOS	500	2	34,000
		GMOS	600	2	33,000
		GMOS	700	2	31,000
		ND2.0	800	8	37,000
		GMOS	900	4	40,000
	4x4	GMOS	400	1	27,000 (6800 cts @ 400 nm)	400nm (scattered light in i+z filters)
		GMOS	500	1	34,000
		GMOS	600	1	33,000
		GMOS	700	1	31,000
		ND2.0	800	4	37,000
		GMOS	900	2	40,000
0.5arcsec	1x1	GMOS	400	32	37,000 (9400 cts @ 400 nm)	400nm (scattered light in r+i+z filters)
		GMOS	500	24	35,000	500nm (scattered light in i+z filters)
		GMOS	600	24	33,000	600nm (scattered light in z filter)
		GMOS	700	24	31,000	not available
		none	800	1	32,000	800nm
		GMOS	900	40	34,000	not available
	2x1,1x2	GMOS	400	16	37,000 (9400 cts @ 400 nm)
		GMOS	500	12	35,000
		GMOS	600	12	33,000
		GMOS	700	12	31,000
		ND2.0	800	48	37,000	not available
		GMOS	900	20	34,000
	2x2,4x1,1x4	GMOS	400	8	37,000 (9400 cts @ 400 nm)
		GMOS	500	6	35,000
		GMOS	600	6	33,000
		GMOS	700	6	31,000
		ND2.0	800	24	37,000
		GMOS	900	10	34,000
	2x4,4x2	GMOS	400	4	37,000 (9400 cts @ 400 nm)
		GMOS	500	3	35,000
		GMOS	600	3	33,000
		GMOS	700	3	31,000
		ND2.0	800	12	37,000
		GMOS	900	5	34,000
	4x4	GMOS	400	2	37,000 (9400 cts @ 400 nm)
		GMOS	500	1	24,000 (2800 cts @ 400 nm)	not available
		GMOS	600	1	23,000	not available
		GMOS	700	1	21,000	not avilable
		ND2.0	800	6	37,000
		GMOS	900	2		not available
0.25arcsec	1x1	GMOS	400	64	37,000 (9400 cts @ 400 nm)
		GMOS	500	48	35,000
		GMOS	600	48	33,000
		GMOS	700	48	31,000
		none	800	2	32,000
		GMOS	900	80	34,000
	2x1,1x2	GMOS	400	32	37,000 (9400 cts @ 400 nm)
		GMOS	500	24	35,000
		GMOS	600	24	33,000
		GMOS	700	24	31,000
		none	800	1	32,000
		GMOS	900	40	34,000
	2x2,4x1,1x4	GMOS	400	16	37,000 (9400 cts @ 400 nm)
		GMOS	500	12	35,000
		GMOS	600	12	33,000
		GMOS	700	12	31,000
		ND2.0	800	48	39,000
		GMOS	900	20	34,000
	2x4,4x2	GMOS	400	8	37,000 (9400 cts @ 400 nm)
		GMOS	500	6	35,000
		GMOS	600	6	33,000
		GMOS	700	6	31,000
		ND2.0	800	24	39,000
		GMOS	900	10	34,000
	4x4	GMOS	400	4	37,000 (9400 cts @ 400 nm)
		GMOS	500	3	35,000
		GMOS	600	3	33,000
		GMOS	700	3	31,000
		ND2.0	800	12	39,000
		GMOS	900	5	34,000

**GCALflat configurations for B600 Grating (IFU)**
Note: It is not recommended to bin IFU spectra in the spatial direction
# GCALflat spectrum contaminated by scattered light blueward of 400nm
IFU	GMOS Filter	X,Y Binning	GCAL filter	Central Wavelength (nm)	Exp. Time (sec)	Peak Counts (GMOS-N)	Spectra (GMOS-N)
IFU-R	none	1x1	GMOS	400	220	34,000 (6300 cts @ 400 nm)	400nm (scattered light in r+i+z filters)
	none		GMOS	500	160	35,000	500nm
	none		GMOS	600	180	34,000	600nm
	none		GMOS	700	180	34,000	700nm
	none		none	800	8	36,000	800nm
	none		none	900	8	34,000	900nm
	none	2x1	GMOS	400	100	34,000 (6300 cts @ 400 nm)
	none		GMOS	500	80	35,000
	none		GMOS	600	90	34,000
	none		GMOS	700	90	34,000
	none		none	800	4	36,000
	none		GMOS	900	150	37,000	900nm
	none	4x1	GMOS	400	50	34,000 (6300 cts @ 400 nm)
	none		GMOS	500	40	35,000
	none		GMOS	600	45	34,000
	none		GMOS	700	45	34,000
	none		none	800	2	36,000
	none		GMOS	900	75	37,000
IFU-2	g	1x1	GMOS	475	300		not available
	g	2x1	GMOS	475	150
	g	4x1	GMOS	475	75
	r	1x1	GMOS	630	180		not available
	r	2x1	GMOS	630	90
	r	4x1	GMOS	630	45
	i	1x1	none	780	8		not available
	i	2x1	none	780	4
	i	4x1	none	780	2
	z	1x1	none	935	12		not available
	z	2x1	none	935	6
	z	4x1	none	935	3

Characterization of the R600 grating is not complete. Please use the configurations and exposure times given for the B600 grating.

Characterization of the R831 grating is not complete. Please use the configurations and exposure times given in the old calibration table.

 (The Old Table)
-----------------------------------------------------------------------------------
Grating    lambda_min   lambda_max    binX    binY    FPU    GCALFilter   Exptime
-----------------------------------------------------------------------------------
R831         400          950          1       1      1.0        GMOS       12         
R831         400          950          2       1      1.0        GMOS        6         
R831         400          950          1       2      1.0        GMOS        6         
R831         400          950          2       2      1.0        GMOS        4         
R831         400          950          4       1      1.0        GMOS        4         
R831         400          950          1       4      1.0        GMOS        4         
R831         400          950          4       2      1.0        GMOS        2         
R831         400          950          2       4      1.0        GMOS        2         
R831         400          950          4       4      1.0        GMOS        1 

R831         400          950          1       1      IFU        GMOS      180  
R831         400          950          2       1      IFU        GMOS       90  
R831         400          950          4       1      IFU        GMOS       45  
-----------------------------------------------------------------------------------

Characterization of the B1200 grating is not complete. Please use configurations and twice the exposures times for B600 listed for lambda=400-555nm

CuAr Arcs: R150 R400 B600 R600 R831 B1200

All CuAr Arcs are taken with

GCALlamp=CuAr
GCALdiffuser=VISIBLE


===============================> CuAr arcs <=======================================
-----------------------------------------------------------------------------------
Grating    lambda_min   lambda_max    binX    binY    FPU    GCALFilter   Exptime
-----------------------------------------------------------------------------------
R150         400          950          1       1      1.0        None        1*
R150         400          950          2       1      1.0        GMOS       15
R150         400          950          1       2      1.0        GMOS       15
R150         400          950          2       2      1.0        GMOS        8       
R150         400          950          4       1      1.0        GMOS        8       
R150         400          950          1       4      1.0        GMOS        8        
R150         400          950          4       2      1.0        GMOS        4
R150         400          950          2       4      1.0        GMOS        4
R150         400          950          4       4      1.0        GMOS        2       

R150         400          950          1       1      IFU        None       10
R150         400          950          2       1      IFU        None        5
R150         400          950          4       1      IFU        None        3


===============================> CuAr arcs <=======================================
-----------------------------------------------------------------------------------
Grating    lambda_min   lambda_max    binX    binY    FPU    GCALFilter   Exptime
-----------------------------------------------------------------------------------
R400         400          950          1       1      1.0        None        2
R400         400          950          2       1      1.0        None        1
R400         400          950          1       2      1.0        None        1
R400         400          950          2       2      1.0        GMOS       15
R400         400          950          4       1      1.0        GMOS       15
R400         400          950          1       4      1.0        GMOS       15
R400         400          950          4       2      1.0        GMOS        8
R400         400          950          2       4      1.0        GMOS        8
R400         400          950          4       4      1.0        GMOS        4

R400         400          950          1       1      IFU        None       20
R400         400          950          2       1      IFU        None       10
R400         400          950          4       1      IFU        None        5


===============================> CuAr arcs <=======================================
-----------------------------------------------------------------------------------
Grating    lambda_min   lambda_max    binX    binY    FPU    GCALFilter   Exptime
-----------------------------------------------------------------------------------
B600	     400          555  	       1       1      1.0        None       45
B600         400          555          2       1      1.0        None       30
B600         400          555          1       2      1.0        None       30
B600         400          555          2       2      1.0        None       20       
B600         400          555          4       1      1.0        None       20       
B600         400          555          1       4      1.0        None       20       
B600         400          555          4       2      1.0        None       10
B600         400          555          2       4      1.0        None       10
B600         400          555          4       4      1.0        None        5       

B600	     400          555  	       1       1      IFU        None      180
B600	     400          555  	       2       1      IFU        None      180
B600	     400          555  	       4       1      IFU        None      120

B600	     556          610  	       1       1      1.0        None       15 
B600         556          610          2       1      1.0        None        8 
B600         556          610          1       2      1.0        None        8 
B600         556          610          2       2      1.0        None        4       
B600         556          610          4       1      1.0        None        4       
B600         556          610          1       4      1.0        None        4       
B600         556          610          4       2      1.0        None        2       
B600         556          610          2       4      1.0        None        2       
B600         556          610          4       4      1.0        None        1       

B600	     556          610  	       1       1      IFU        None       90
B600	     556          610  	       2       1      IFU        None       60
B600	     556          610  	       4       1      IFU        None       30

B600	     611          950  	       1       1      1.0        None        3 
B600         611          950          2       1      1.0        GMOS       40 
B600         611          950          1       2      1.0        GMOS       40 
B600         611          950          2       2      1.0        GMOS       20        
B600         611          950          4       1      1.0        GMOS       20        
B600         611          950          1       4      1.0        GMOS       20       
B600         611          950          4       2      1.0        GMOS       10 
B600         611          950          2       4      1.0        GMOS       10 
B600         611          950          4       4      1.0        GMOS        5       

B600	     611          950  	       1       1      IFU        None       30       
B600	     611          950  	       2       1      IFU        None       15       
B600	     611          950  	       4       1      IFU        None        8

For the R600 grating please use the configurations and exposure times given for the B600 grating.

===============================> CuAr arcs <=======================================
-----------------------------------------------------------------------------------
Grating    lambda_min   lambda_max    binX    binY    FPU    GCALFilter   Exptime
-----------------------------------------------------------------------------------
R831         400          590          1       1      1.0        None      180
R831         400          590          2       1      1.0        None      120
R831         400          590          1       2      1.0        None      120
R831         400          590          2       2      1.0        None       60
R831         400          590          4       1      1.0        None       60
R831         400          590          1       4      1.0        None       60
R831         400          590          4       2      1.0        None       30
R831         400          590          2       4      1.0        None       30
R831         400          590          4       4      1.0        None       15

R831         400          590          1       1      IFU        None      300
R831         400          590          2       1      IFU        None      180
R831         400          590          4       1      IFU        None      120

R831         591          650          1       1      1.0        None       30
R831         591          650          2       1      1.0        None       15
R831         591          650          1       2      1.0        None       15
R831         591          650          2       2      1.0        None        8
R831         591          650          4       1      1.0        None        8
R831         591          650          1       4      1.0        None        8
R831         591          650          4       2      1.0        None        4 
R831         591          650          2       4      1.0        None        4 
R831         591          650          4       4      1.0        None        2 

R831         591          650          1       1      IFU        None       90 
R831         591          650          2       1      IFU        None       45 
R831         591          650          4       1      IFU        None       20 

R831         651          950          1       1      1.0        None        2 
R831         651          950          2       1      1.0        None        1 
R831         651          950          1       2      1.0        None        1 
R831         651          950          2       2      1.0        None        1 
R831         651          950          4       1      1.0        None        1 
R831         651          950          1       4      1.0        None        1 
R831         651          950          4       2      1.0        GMOS       10
R831         651          950          2       4      1.0        GMOS       10
R831         651          950          4       4      1.0        GMOS        5

R831         651          950          1       1      IFU        None       30
R831         651          950          2       1      IFU        None       15
R831         651          950          4       1      IFU        None        8
-----------------------------------------------------------------------------------

For the B1200 grating please use the configurations and twice the exposure times listed for the B600 grating.

Gemini Observatory: Exploring The Universe From Both Hemispheres

Navigation

Flat/Arc Exposure Times

Recommended GCAL configurations and Exp. Times for GMOS calibrations:
Quartz Halogen flats and CuAr arcs

GCALflats

Mirror (for mask imaging)
R150 Longslit / MOS and IFU
R400 Longslit / MOS and IFU
B600 Longslit / MOS and IFU
R600 Longslit / MOS and IFU
R831 Longslit / MOS and IFU
B1200 Longslit / MOS and IFU

CuAr Arcs: R150 R400 B600 R600 R831 B1200

Gemini Observatory: Exploring The Universe From Both Hemispheres

Navigation

Flat/Arc Exposure Times

Recommended GCAL configurations and Exp. Times for GMOS calibrations: Quartz Halogen flats and CuAr arcs

GCALflats

Mirror (for mask imaging) R150 Longslit / MOS and IFU R400 Longslit / MOS and IFU B600 Longslit / MOS and IFU R600 Longslit / MOS and IFU R831 Longslit / MOS and IFU B1200 Longslit / MOS and IFU

CuAr Arcs: R150 R400 B600 R600 R831 B1200

Recommended GCAL configurations and Exp. Times for GMOS calibrations:
Quartz Halogen flats and CuAr arcs

Mirror (for mask imaging)
R150 Longslit / MOS and IFU
R400 Longslit / MOS and IFU
B600 Longslit / MOS and IFU
R600 Longslit / MOS and IFU
R831 Longslit / MOS and IFU
B1200 Longslit / MOS and IFU