Currently, three instruments, TRISPEC, HOWPol and High-speed Camera and Spectrograph, are properly used for observation with KANATA telescope and one instrument, a simultaneous Opt-NIR instrument (HONIR), is being developed at HASC.

TRISPEC (Simultaneous Optical and NIR Imager, Spectrograph, and Polarimeter)

TRISPEC has been developed by members in Z-lab, Nagoya University. It has one optical channel (OPT) and two near-infrared channels (IR1, IR2) and we can obtain three channel images simultaneously. TRIPSEC is a versatile instrument and has observational modes of imaging, spectroscopy, imaging polarimetry, spectropolarimetry. Because of troubles of readout system and wheel stacking, the operation of TRISPEC is pending since 2011 June.

Performance in imaging mode

	OPT	IR1	IR2
Detector	CCD(512x512)	InSb(256x256)	InSb(256x256)
Field of View (Imaging pol)	7.0'x7.0' x 1 (7.0'x1.7' x 2)	7.0'x7.0' x 1 (7.0'x1.7' x 2)	7.0'x7.0' x 1 (7.0'x1.7' x 2)
Pixel Scale	0.82"/pixel	1.65"/pixel	1.65"/pixel
Filters	B, V, R, I	J, H	Ks, K, H_2
Limiting mag(*1) (Imaging pol)(*2)	18.5 (14.8)	16.8 (13.2)	15.1 (11.4)

(*1)10-min exposure, 10-sigma, (*2)10-min exposure, delta_P = 0.5%

Performance in spectroscopy mode

	OPT	IR1	IR2
Wavelength	0.45-0.90 micron	0.90-1.85 micron	1.85-2.50 micron
Slit size (Specpol)	3.3"x7.0' x 1 (3.3"x1.7' x 2)	3.3"x7.0' x 1 (3.3"x1.7' x 2)	3.3"x7.0' x 1 (3.3"x1.7' x 2)
Resolution(*3)	138	142	360
Limiting mag(*4) (Specpol)(*5)	16.7 (12.8)	15.5 (12.0)	13.3 (9.7)

(*3)Resolution = lambda / d_lambda, (*4)60-min exposure, 10-sigma, (*5)60-min exposure, delta_P = 0.5%

This CCD camera has been developed by members of Kyoto University and Hamamatsu Photonics K. K, which is attached to the low-resolution spectrograph developed by memvers of Kyoto University and Hiroshima University. The CCD camera has a function of high-speed readout and produces 35.8 FITS images per second at the highest rate. The CCD chip is E2V 512x512 back-illuminated type.

Basic Specifications

Pixel format	512 x 512
Pixel size	16 micron x 16 micron
Focul reducer	1:0.57 (0.26"/pixel)
Field of view	~2.3' x 2.3'
Cooling	50 deg C below ambient
Frame rate	Maximum 35.8 frames/sec (no binning)
Exposure time	Minimum 27.1 msec to maximum 10 sec
Spectrograph	Grism: 430-690nm, R=150), Prism: 400-800nm, R~20(=9-73)

Example of observational error:
delta_V = 0.03 mag in maximum frame rate (35.8frame/sec) observation for ~9 mag star

HOWPol is an optical imaging polarimeter which provides four linearly polarized images at position angles of 0 deg, 45 degs, 90 degs and 135 degs. Therefore, we can obtain Stokes I, Q, and U parameters simultaneously. The main target of this instrument is prompt emission and afterglow of gamma-ray bursts. HOWPol is operating since 2009. When we receive a discovery report of GRB via GCN, an automatic observation for the GRB with HOWPol is performed immediately at Kanata telescope.

Basic Specifications

Wavelength	0.45 -- 1.1 micron
Field of view	Imaging: 15' diameter Impol(wide): 7' x 7' Impol(narrow): 15' x 1' Spectroscopy: 2.3" x 15'
Filter	B, V, R, I, z', H-alpha
Grism	Low-res (Grism 420/mm, 620nm blaze, R~400)
Wollaston prism	(Common) Wedged double Wollaston prism (Wide) Made of six rutile blocks (Narrow) Six magnesium fluoride blocks and two fused silica wedges
CCD	Two fully depleted 2k-4k CCDs, 200 micron-thick depletion layer
Limiting mag	Photometry(*6): R = 19.2 Imaging polarimetry(*7): R = 16.0

(*6)10-min exposure, delta_R = 0.02 mag, (*7)10-min exposure, delta_P = 0.2%