Data Set Information
DATA_SET_NAME THE OAO/OASIS JUPITER OBSERVATION OF SL9 FRAGMENT K V1.0
DATA_SET_ID OAO-J-OASIS-3-RDR-SL9-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview : Using OASIS at cassegrain focus of the 188-cm telescope of the Okayama Astrophysical Observatory, infrared images centered at 2.35 micron were taken of the crash of fragment K from the Shoemaker-Levy 9 comet into Jupiter. The data consist of 160 images with detached labels and documentation. Background : 1500 frames of near-infrared images were taken from 15 - 24 July. Pixel size is 256x256, data size is 270KB for one frame. Total size of all data is about 400MB (but they include less valuable data) OASIS observed impacts of fragments C, D, K and N. wavelength number of (micron) frames C impact 2.35 360 (C-plume was saturated in 30 frames) D impact 2.35/1.70 240 (170/2.35, 70/1.70; no detect for 1.70) K impact 2.35 160 (Total size of the K impact is 43MB) N impact 2.17 400 (but no detect) There are additional data in which ten frames taken during 3-5 minutes were combined to form a better image. A summary of data is given below. wavelength/micron number of frames 1.70 (methane band) 30 2.17 (hydrogen band) 130 2.35 (methane band) 140 1.50 (ammonia band) 15 others (continuum) 17 The impact of fragment K was predicted at 10h18m UT, July 19, 1994. A filter (center wavelength of 2.35 micron (FWHM 0.05 micron)) was used to take images continuously. In each frame, Jupiter and two Galilean satellites, Io (left) and Ganymede (right) were seen. Io was used as a flux calibrator. Flux from Io was estimated at 7.8x10^-12 W m^-2 micron^-1 These observations caught two precursors: the main event and the shoulder of the K impact. Two ND filters were used, whose transparencies are 10% and 2%, to prevent the OASIS from saturation due to the brighter main event. For details about the observations, see the following papers: Watanabe et al., Publ. Astron. Soc. Japan, 47,L21-L24 and Plate 5 (1995) [WATANABEETAL1995] Takeuchi et al., Geophys. Res. Letters, 22, 1581-1584 (1995) [TAKEUCHIETAL1995] Processing : For the images taken by Okayama at 1994 July, the top of the image was south. So, IRAF was used to rotate the images by 180 degrees around the centers of the images resulting in associated keywords such as WSCDIM. Each image from the fragment K set was bias subtracted, flat fielded and corrected for bad pixels. The top of each frame is north. In addition, IRAF was used to correct for cosmic rays (see CRCOR which is a comment on cosmic ray work). Data structure : The data were supplied in FITS form. Ancillary Data : None Software : None Media/Format : The data were supplied on 8 mm tape.
DATA_SET_RELEASE_DATE 1995-08-14T00:00:00.000Z
START_TIME 1994-07-19T07:19:32.000Z
STOP_TIME 1994-07-19T07:49:38.000Z
MISSION_NAME COMET SL9/JUPITER COLLISION
MISSION_START_DATE 1993-01-01T12:00:00.000Z
MISSION_STOP_DATE 1996-01-01T12:00:00.000Z
TARGET_NAME JUPITER
TARGET_TYPE PLANET
INSTRUMENT_HOST_ID OAO
INSTRUMENT_NAME OKAYAMA ASTROPHYSICAL SYSTEM - IR IMAGING & SPECTROSCOPY
INSTRUMENT_ID OASIS
INSTRUMENT_TYPE CCD
NODE_NAME Small Bodies
ARCHIVE_STATUS ARCHIVED
CONFIDENCE_LEVEL_NOTE Confidence Level Overview : The 160 images were inspected at the SBN and corrections made to the data were recorded in the PDS labels. Data Coverage and Quality : Only fragment K data has been included in this archive. Limitations : The accuracy of the starting time is +/-1sec, but the accuracy of the integrating time is even better, +/-0.005sec.
CITATION_DESCRIPTION Takeuchi, S., Watanabe, J., THE OAO/OASIS JUPITER OBSERVATION OF SL9 FRAGMENT K V1.0, OAO-J-OASIS-3-RDR-SL9-V1.0, NASA Planetary Data System, 1995
ABSTRACT_TEXT Using OASIS at cassegrain focus of the 188-cm telescope of the Okayama Astrophysical Observatory, infrared images centered at 2.35 micron were taken of the crash of fragment K from the Shoemaker-Levy 9 comet into Jupiter. The data consist of 160 images with detached labels and documentation.
PRODUCER_FULL_NAME SATORU TAKEUCHI
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