“SpecobjID”的版本间差异
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无编辑摘要 |
无编辑摘要 |
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*DR7 |
*DR7 |
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Bits Length (# of bits) Mask Assignment Description |
Bits Length (# of bits) Mask Assignment Description |
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0-15 16 0xFFFF000000000000 plate number of spectroscopic plate |
:0-15 16 0xFFFF000000000000 plate number of spectroscopic plate |
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16-31 16 0x0000FFFF00000000 MJD MJD (date) plate was observed |
:16-31 16 0x0000FFFF00000000 MJD MJD (date) plate was observed |
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32-41 10 0x00000000FFC00000 fiberID number of spectroscopic fiber on plate (1-640) |
:32-41 10 0x00000000FFC00000 fiberID number of spectroscopic fiber on plate (1-640) |
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42-47 6 0x00000000003F0000 type type of targeted object |
:42-47 6 0x00000000003F0000 type type of targeted object |
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48-63 16 0x000000000000FFFF line/redshift/index 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) or redshift (ELRedhsift or XCRedshift) |
:48-63 16 0x000000000000FFFF line/redshift/index 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) or redshift (ELRedhsift or XCRedshift) |
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*DR8 |
*DR8 and after |
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:50-63 plate id number (14 bits) |
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:38-49 fiber id number (12 bits) |
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:24-37 MJD (date) plate was observed minus 50000 (14 bits) |
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:10-23 rerun (14 bits) |
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2015年1月22日 (四) 01:32的版本
- DR7
Bits Length (# of bits) Mask Assignment Description
- 0-15 16 0xFFFF000000000000 plate number of spectroscopic plate
- 16-31 16 0x0000FFFF00000000 MJD MJD (date) plate was observed
- 32-41 10 0x00000000FFC00000 fiberID number of spectroscopic fiber on plate (1-640)
- 42-47 6 0x00000000003F0000 type type of targeted object
- 48-63 16 0x000000000000FFFF line/redshift/index 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) or redshift (ELRedhsift or XCRedshift)
- DR8 and after
- 50-63 plate id number (14 bits)
- 38-49 fiber id number (12 bits)
- 24-37 MJD (date) plate was observed minus 50000 (14 bits)
- 10-23 rerun (14 bits)
- 0-9 line/redshift/index: 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) (10 bits)