B/subaru Log of Subaru Prime Focus Camera Exposures (ADAC NAOJ, 2005) ================================================================================ Log of Subaru Prime Focus Camera (Suprime-Cam) Exposures ================================================================================ ADC_Keywords: Observatory log ; Description: This database contains a log of the Subaru Prime Focus Camera (Suprime-Cam) Exposures since April 2001. The data are regularly updated (see the date of the last version at the end of this file). Suprime-Cam is an 80-mega pixels (10240 x 8192) mosaic CCD camera, for the wide-field prime focus of the 8.2m Subaru telescope. Suprime-Cam covers a field of view 34'x27', a unique facility among the 8-10m class telescopes, with a resolution of 0".202 per pixel. The focal plane consists of ten high- resistivity 2kx2k CCDs developed by MIT Lincoln Laboratory, which are cooled by a large Stirling-cycle cooler. The CCD readout electronics was designed to be scalable, which allows the multiple read-out of tens of CCDs. It takes 50 seconds to readout entire arrays. A filter-exchange mechanism of the jukebox type is designed that can hold up to ten large filters (205x170x15mm^3^). The wide-field corrector is basically a three-lens Wynne- type, but has a new type of atmospheric dispersion corrector. The corrector provides a flat focal plane and an un-vignetted field of view of 30' in diameter. The achieved co-planarity of the focal array mosaic is smaller than 30um peak-to-peak, which realizes mostly the seeing limited image over the entire field. The median seeing in the I_c-band, measured over one year and a half, is 0".61. The PSF anisotropy in Suprime-Cam images, estimated by stellar ellipticities, is about 2% under this median seeing condition. At the time of commissioning, Suprime-Cam had the largest survey speed, which is defined as the field of view multiplied by the primary mirror area of the telescope, among those cameras built for sub-arcsecond imaging. For details, see: Miyazaki et al., Publ. Astron. Soc. Japan 54, 833-853, 2002 (2002PASJ...54..833M) File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file suprimc.dat 122 196340 The Suprime-Cam Observation Log (2004-06-24) -------------------------------------------------------------------------------- See also: http://subarutelescope.org/Observing/Instruments/SCam/ : Sprime-Cam home page http://smoka.nao.ac.jp/ : Subaru data archives, home page Byte-by-byte Description of file: suprimc.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 12 A12 --- FrameID ! Frame ID (1) 14- 21 F8.4 deg RAdeg Right Ascension (J2000) of the CCD chip center 23- 30 F8.4 deg DEdeg Declination (J2000) of the CCD chip center 32- 35 I4 yr ObsStart.Y Observation start date (year, UT) 36 A1 --- --- [-] 37- 38 I2 "month" ObsStart.M Observation start date (month, UT) 39 A1 --- --- [-] 40- 41 I2 d ObsStart.D Observation start date (day, UT) 43- 44 I2 h ObsStart.h Exposure start time (hour, UT) 45 A1 --- --- [:] 46- 47 I2 min ObsStart.m Exposure start time (minute, UT) 48 A1 --- --- [:] 49- 50 I2 s ObsStart.s Exposure start time (second, UT) 52- 57 F6.1 s ExpTime Exposure time 59- 64 A6 --- ObsType Observation type (BIAS, FLAT, OBJECT, etc.) * those data other than OBJECT are omitted. 66- 95 A30 --- Object Object name 97-104 A8 --- Filter Filter combination (2) 106-110 F5.3 --- AirMass Value of the airmass at the beginning of the exposure 112-115 I4 pix NAXIS1 Dimension of the image (X-axis) 117-120 I4 pix NAXIS2 Dimension of the image (Y-axis) 122 A1 --- FF [01] Flat-fielding processing flag (3) -------------------------------------------------------------------------------- Note (1): Unique identifier for an observational data. The last digit denotes CCD chip number. For CCD chip number, see: http://subarutelescope.org/Observing/Instruments/SCam/ccd.html Note (2): Filter names written on FITS headers. For a detailed description see: http://smoka.nao.ac.jp/filter.jsp Note (3): '1'= flat-field processed data are provided in SMOKA, '0'= they are not provided. -------------------------------------------------------------------------------- ================================================================================ (End) Fumiaki Nakata, Koichi Nakajima [ADAC, NAOJ] 21-Feb-2006