# L1-MBI Data model

## File: *_{img/wht/flg}_L1_1.fits

### File contents

HDU | data | note
--- | --- | ---
HDU0 | None | PrimaryHDU
HDU1 | reduced image (9k x 9k) | ImageHDU

### HDU0

keyword | value | comment | fallback_value | type | module
--- | --- | --- | --- | --- | ---
SIMPLE | True | Fits standard | True | bool | csst_sims

### HDU1

#### Header of `csst_ms_mbi_instrument`

keyword | value | comment | fallback_value | type | module
--- | --- | --- | --- | --- | ---
SATURATE | 1833.333333333333 |  |  | f32 | csst_ms_mbi_instrument
CRCOUNT | 66791 |  |  | i8 | csst_ms_mbi_instrument
INST_V | ‘0.0.1 ‘ |  |  | str | csst_ms_mbi_instrument
INST_TOL | ‘2022-12-30T10:18:53’ | Time of last modification |  | str | csst_ms_mbi_instrument
DATASUM | ‘1352015684’ | data unit checksum updated 2022-10-28T19:29:10 |  | str | csst_ms_mbi_instrument

#### Header of `csst_ms_mbi_distortion`

keyword | value | comment | fallback_value | type | module
--- | --- | --- | --- | --- | ---
RADESYS | ‘ICRS ‘ | should be always ‘ICRS’ | ‘ICRS’ | str | csst_ms_mbi_distortion
STAR_FIT | 11 |  | 0 | i8 | csst_ms_mbi_distortion
PV1_0 | 0.003205383944913964 |  | 0 | f32 | csst_ms_mbi_distortion
PV1_1 | 0.8673020820536499 |  | 0 | f32 | csst_ms_mbi_distortion
PV1_2 | -0.2011989871377834 |  | 0 | f32 | csst_ms_mbi_distortion
PV1_3 | -0.2597214229472611 |  | 0 | f32 | csst_ms_mbi_distortion
PV1_4 | 0.4353828741811097 |  | 0 | f32 | csst_ms_mbi_distortion
PV1_5 | -0.5054216569802673 |  | 0 | f32 | csst_ms_mbi_distortion
PV1_6 | 0.1951474426617432 |  | 0 | f32 | csst_ms_mbi_distortion
PV2_0 | 0.00109803885992697 |  | 0 | f32 | csst_ms_mbi_distortion
PV2_1 | 0.9171065857705857 |  | 0 | f32 | csst_ms_mbi_distortion
PV2_2 | -0.04908256792722099 |  | 0 | f32 | csst_ms_mbi_distortion
PV2_3 | -0.09860562038448289 |  | 0 | f32 | csst_ms_mbi_distortion
PV2_4 | 0.07961855240788976 |  | 0 | f32 | csst_ms_mbi_distortion
PV2_5 | -0.2009224365497067 |  | 0 | f32 | csst_ms_mbi_distortion
PV2_6 | 0.1741954691884874 |  | 0 | f32 | csst_ms_mbi_distortion
RA_OFF | -0.0 | mas in unit | -99 | f32 | csst_ms_mbi_distortion
DEC_OFF | 0.0 | mas in unit | -99 | f32 | csst_ms_mbi_distortion
RA_STD | 127.1 | mas in unit | -99 | f32 | csst_ms_mbi_distortion
DEC_STD | 60.4 | mas in unit | -99 | f32 | csst_ms_mbi_distortion
RA_CEN | 192.1940713422841 | the center of detector in ra | 192.1940713422841 | f32 | csst_ms_mbi_distortion
DEC_CEN | 26.72643742371229 | the center of detector in dec | 26.72643742371229 | f32 | csst_ms_mbi_distortion
DIST_V | ‘1.0 ‘ | version of distortion | ‘1.0’ | str | csst_ms_mbi_distortion
DIST_TOL | ‘2022-12-29T16:36:47’ | distortion operation time | ‘2022-12-29T16:36:47’ | str | csst_ms_mbi_distortion
DIST_S | 0 | 0=done 1=wrong | 1 | i8 | csst_ms_mbi_distortion

#### Header of `csst_ms_mbi_position`

keyword | value | comment | fallback_value | type | module
--- | --- | --- | --- | --- | ---
RADESYS | ‘ICRS ‘ | should be always ‘ICRS’ | ‘ICRS’ | str | csst_ms_mbi_position
PV1_0 | -7.032303876526E-04 |  | 0 | f32 | csst_ms_mbi_position
PV1_1 | 9.986639936274E-01 |  | 0 | f32 | csst_ms_mbi_position
PV1_2 | -3.506141592607E-03 |  | 0 | f32 | csst_ms_mbi_position
PV1_4 | -2.342575913122E-03 |  | 0 | f32 | csst_ms_mbi_position
PV1_5 | -2.216829433925E-03 |  | 0 | f32 | csst_ms_mbi_position
PV1_6 | -5.122207406521E-03 |  | 0 | f32 | csst_ms_mbi_position
PV2_0 | -6.939462894407E-04 |  | 0 | f32 | csst_ms_mbi_position
PV2_1 | 9.988294486003E-01 |  | 0 | f32 | csst_ms_mbi_position
PV2_2 | -1.687802061938E-03 |  | 0 | f32 | csst_ms_mbi_position
PV2_4 | 1.561587727533E-03 |  | 0 | f32 | csst_ms_mbi_position
PV2_5 | -4.159618376671E-03 |  | 0 | f32 | csst_ms_mbi_position
PV2_6 | 3.398895060382E-03 |  | 0 | f32 | csst_ms_mbi_position
FGROUPNO | 1 | SCAMP field group label |  | i8 | csst_ms_mbi_position
ASTIRMS1 | 0.000000000000E+00 | Astrom. dispersion RMS (intern., high S/N) |  | f32 | csst_ms_mbi_position
ASTIRMS2 | 0.000000000000E+00 | Astrom. dispersion RMS (intern., high S/N) |  | f32 | csst_ms_mbi_position
ASTRRMS1 | 6.458653303335E-06 | Astrom. dispersion RMS (ref., high S/N) |  | f32 | csst_ms_mbi_position
ASTRRMS2 | 8.724734011714E-06 | Astrom. dispersion RMS (ref., high S/N) |  | f32 | csst_ms_mbi_position
ASTINST | 1 | SCAMP astrometric instrument label |  | i8 | csst_ms_mbi_position
FLXSCALE | 1.000000000000E+00 | SCAMP relative flux scale |  | f32 | csst_ms_mbi_position
MAGZEROP | 0.00000000 | SCAMP zero-point |  | f32 | csst_ms_mbi_position
PHOTIRMS | 0.00000000 | mag dispersion RMS (internal, high S/N) |  | f32 | csst_ms_mbi_position
PHOTINST | 1 | SCAMP photometric instrument label |  | i8 | csst_ms_mbi_position
PHOTLINK | F | True if linked to a photometric field |  | bool | csst_ms_mbi_position
WCS_S | 0 | 0=done |  | i8 | csst_ms_mbi_position
WCS_V | ‘2.0.4 ‘ | Version of WCS calibration |  | str | csst_ms_mbi_position
WCS_P | ‘default.scamp’ | Configure file name of WCS |  | str | csst_ms_mbi_position
WCS_TOL | ‘2022-12-30 18:32:46 PM’ | Time of last wcs calibration |  | str | csst_ms_mbi_position

#### Header of `csst_ms_mbi_flux`

keyword | value | comment | fallback_value | type | module
--- | --- | --- | --- | --- | ---
CALI_REF | ‘GAIA ‘ | the reference database for calibration |  | str | csst_ms_mbi_flux
ZP | 23.8435 | photometric zero point in magnitude |  | f32 | csst_ms_mbi_flux
ZPRMS | 0.0101 | zpt rms of the matched objects |  | f32 | csst_ms_mbi_flux
APER_R | 10 | (pixels) photo-aperture radius |  | i8 | csst_ms_mbi_flux
FWHM | 2.147 | FWHM in pixel |  | f32 | csst_ms_mbi_flux
RAOFF | -0.188 | median positional offset from GAIA, in arcsec |  | f32 | csst_ms_mbi_flux
DECOFF | -0.1061 | median positional offset from GAIA, in arcsec |  | f32 | csst_ms_mbi_flux
NSTAR | 49 | total number of stars detected |  | i8 | csst_ms_mbi_flux
NMATCH | 25 | total number of matched stars in 2 arcsec |  | i8 | csst_ms_mbi_flux
MDNCOL | 0.0 | median (BP-RP)_GAIA of matched stars |  | f32 | csst_ms_mbi_flux
SKY | 0.0359 | (e-/s per pixel) |  | f32 | csst_ms_mbi_flux
SKYRMS | 0.1766 | rms/pixel of the sky in unit of e-/s |  | f32 | csst_ms_mbi_flux
MLIM | 21.83 | magnitude limiting of 5-sigma galaxy detection |  | f32 | csst_ms_mbi_flux
FLUX_S | 0 | flux calibration status |  | i8 | csst_ms_mbi_flux
FLUX_V | ‘1.3 ‘ | version of calibration code |  | str | csst_ms_mbi_flux
FLUX_TOL= | ‘2022-12-30 18:36:05’ | flux calibration operation time |  | str | csst_ms_mbi_flux

## File: *_cat.fits

### File contents

HDU | data | note
--- | --- | ---
HDU0 | None | PrimaryHDU
HDU1 | Table | ImageHDU

### HDU0

#### Header of photometry

keyword | value | comment | fallback_value | type | module
--- | --- | --- | --- | --- | ---
APERSIZE | ‘3,4,5,6,8,10,13,16,20,25,30,40,’ | aperture radii in pixels |  | str | csst_ms_mbi_photometry
NS_APER | 75 | number of stars used in aperture correction |  | i8 | csst_ms_mbi_photometry
APCOR0 | -0.06074262037873268 | mag correction for aperture #0 |  | f32 | csst_ms_mbi_photometry
APERR0 | 0.0 | mag correction error for aperture #0 |  | f32 | csst_ms_mbi_photometry
APCOR1 | -0.01975813694298267 | mag correction for aperture #1 |  | f32 | csst_ms_mbi_photometry
APERR1 | 0.0 | mag correction error for aperture #1 |  | f32 | csst_ms_mbi_photometry
APCOR2 | 0.0 | mag correction for aperture #2 |  | f32 | csst_ms_mbi_photometry
APERR2 | 0.0 | mag correction error for aperture #2 |  | f32 | csst_ms_mbi_photometry
APCOR3 | 0.01290098764002323 | mag correction for aperture #3 |  | f32 | csst_ms_mbi_photometry
APERR3 | 0.0 | mag correction error for aperture #3 |  | f32 | csst_ms_mbi_photometry
APCOR4 | 0.02804811112582684 | mag correction for aperture #4 |  | f32 | csst_ms_mbi_photometry
APERR4 | 0.0 | mag correction error for aperture #4 |  | f32 | csst_ms_mbi_photometry
APCOR5 | 0.03705496713519096 | mag correction for aperture #5 |  | f32 | csst_ms_mbi_photometry
APERR5 | 0.0 | mag correction error for aperture #5 |  | f32 | csst_ms_mbi_photometry
APCOR6 | 0.04462624341249466 | mag correction for aperture #6 |  | f32 | csst_ms_mbi_photometry
APERR6 | 0.0 | mag correction error for aperture #6 |  | f32 | csst_ms_mbi_photometry
APCOR7 | 0.05059236660599709 | mag correction for aperture #7 |  | f32 | csst_ms_mbi_photometry
APERR7 | 0.0 | mag correction error for aperture #7 |  | f32 | csst_ms_mbi_photometry
APCOR8 | 0.05710481852293015 | mag correction for aperture #8 |  | f32 | csst_ms_mbi_photometry
APERR8 | 0.0 | mag correction error for aperture #8 |  | f32 | csst_ms_mbi_photometry
APCOR9 | 0.06682745367288589 | mag correction for aperture #9 |  | f32 | csst_ms_mbi_photometry
APERR9 | 0.0 | mag correction error for aperture #9 |  | f32 | csst_ms_mbi_photometry
APCOR10 | 0.07620415091514587 | mag correction for aperture #10 |  | f32 | csst_ms_mbi_photometry
APERR10 | 0.0 | mag correction error for aperture #10 |  | f32 | csst_ms_mbi_photometry
APCOR11 | 0.0952027440071106 | mag correction for aperture #11 |  | f32 | csst_ms_mbi_photometry
APERR11 | 0.0 | mag correction error for aperture #11 |  | f32 | csst_ms_mbi_photometry
HIERARCH ns_HYBRID | 328 | number of stars used in HYBRID correction |  | i8 | csst_ms_mbi_photometry
HYBCOR | 0.0498337559401989 | mag correction for HYBRID |  | f32 | csst_ms_mbi_photometry
HYBERR | 0.000711286964798456 | mag correction error |  | f32 | csst_ms_mbi_photometry
NS_PSF | 306 | number of stars used in PSF correction |  | i8 | csst_ms_mbi_photometry
PSFCOR | -0.00268870708532631 | mag correction for PSF |  | f32 | csst_ms_mbi_photometry
PSFERR | 0.000903990056504255 | mag correction error |  | f32 | csst_ms_mbi_photometry
NS_MODEL | 324 | number of stars used in MODEL correction |  | i8 | csst_ms_mbi_photometry
MODCOR | 0.04189466685056686 | mag correction for MODEL |  | f32 | csst_ms_mbi_photometry
MODERR | 0.000894258863834524 | mag correction error |  | f32 | csst_ms_mbi_photometry

### HDU1

#### Header

## File: *_psf.fits

### File contents

HDU | data | note
--- | --- | ---
HDU0 | None | PrimaryHDU
HDU1 | Table | ImageHDU

### HDU0

#### Header

keyword | value | comment | fallback_value | type | module
--- | --- | --- | --- | --- | ---
SIMPLE | True | Fits standard | True | bool | csst_ooc_psf_mbi

### HDU1

#### Header of `csst_ooc_psf_mbi`

keyword | value | comment | fallback_value | type | module
--- | --- | --- | --- | --- | ---
LOADED | 579 | Number of loaded sources |  | I8 | csst_ooc_psf_mbi
ACCEPTED | 573 | Number of accepted sources |  | I8 | csst_ooc_psf_mbi
CHI2 | 1.12832649 | Final reduced chi2 |  | f32 | csst_ooc_psf_mbi
POLNAXIS | 2 | Number of context parameters |  | I8 | csst_ooc_psf_mbi
POLGRP1 | 1 | Polynom group for this context parameter |  | I8 | csst_ooc_psf_mbi
POLNAME1 | ‘XWIN_IMAGE’ | Name of this context parameter |  | Str | csst_ooc_psf_mbi
POLZERO1 | 4607.403434 | Offset value for this context parameter |  | f32 | csst_ooc_psf_mbi
POLSCAL1 | 9161.359825 | Scale value for this context parameter |  | f32 | csst_ooc_psf_mbi
POLGRP2 | 1 | Polynom group for this context parameter |  | I8 | csst_ooc_psf_mbi
POLNAME2 | ‘YWIN_IMAGE’ | Name of this context parameter |  | Str | csst_ooc_psf_mbi
POLZERO2 | 4631.62895 | Offset value for this context parameter |  | f32 | csst_ooc_psf_mbi
POLSCAL2 | 9174.347872 | Scale value for this context parameter |  | f32 | csst_ooc_psf_mbi
POLNGRP | 1 | Number of context groups |  | I8 | csst_ooc_psf_mbi
POLDEG1 | 2 | Polynom degree for this context group |  | I8 | csst_ooc_psf_mbi
PSF_FWHM | 2.31607056 | PSF FWHM in image pixels |  | f32 | csst_ooc_psf_mbi
PSF_SAMP | 0.49278098 | Sampling step of the PSF data in image pixels |  | f32 | csst_ooc_psf_mbi
PSFNAXIS | 3 | Dimensionality of the PSF data |  | I8 | csst_ooc_psf_mbi
PSFAXIS1 | 71 | Number of element along this axis |  | I8 | csst_ooc_psf_mbi
PSFAXIS2 | 71 | Number of element along this axis |  | I8 | csst_ooc_psf_mbi
PSFAXIS3 | 6 | Number of element along this axis |  | I8 | csst_ooc_psf_mbi

#### Header of `csst_ooc_psf_strategy_crds`

keyword | value | comment | fallback_value | type | module
--- | --- | --- | --- | --- | ---
USEAFTER | ‘2028-07-22T18:52:33’ | date and time after the reference files will be used. (YYYY-MM-DDThh:mm:ss) |  | str | csst_ooc_psf_strategy_crds
OBSSTART | ‘2028-07-22T18:52:33’ | UTC date and time of start of first observation (YYYY-MM-DDThh:mm:ss) |  | str | csst_ooc_psf_strategy_crds
OBSEND | ‘2028-07-23T17:54:27’ | UTC date and time of end of last observation (YYYY-MM-DDThh:mm:ss) |  | str | csst_ooc_psf_strategy_crds
EXPTYPE | ‘SCI’ | type of exposes used to create the reference file (‘SCI’or ‘OOC’) |  | str | csst_ooc_psf_strategy_crds
COMBINE_N | 135 | number of exposes used to create the reference file. |  | I8 | csst_ooc_psf_strategy_crds
BREAPHAS | ‘hot’ | phase of breathing effect, which is the focus varies over orbital time scales due to thermal changes. (‘hot’, ‘cold’. ‘none’) |  | str | csst_ooc_psf_strategy_crds
TEMP_PM | 20.72563452 | average temperature surrounding the primary mirror (in K) |  | f32 | csst_ooc_psf_strategy_crds
TEMP_SM | 20.72563452 | average temperature surrounding the secondary mirror (in K) |  | f32 | csst_ooc_psf_strategy_crds
TEMP_TM | 20.72563452 | average temperature surrounding the tertiary mirror (in K) |  | f32 | csst_ooc_psf_strategy_crds
LFOCUST | ‘2028-07-22T18:52:33’ | last focus (AM1 or AM2) time (YYYY-MM-DDThh:mm:ss) |  | str | csst_ooc_psf_strategy_crds
P1_FOCUS | 28025.63452 | parameter 1 of focal length calculated from the positions ofthe focus adjustment mechanism (FAM) and the secondary mirror (in mm) |  | f32 | csst_ooc_psf_strategy_crds
P2_ FOCUS | 28025.63452 | parameter 2 of focal length (in mm) |  | f32 | csst_ooc_psf_strategy_crds
P3_ FOCUS | 28025.63452 | parameter 3 of focal length (in mm) |  | f32 | csst_ooc_psf_strategy_crds
P4_ FOCUS | 28025.63452 | parameter 4 of focal length (in mm) |  | f32 | csst_ooc_psf_strategy_crds
P5_ FOCUS | 28025.63452 | parameter 5 of focal length (in mm) |  | f32 | csst_ooc_psf_strategy_crds
P6_ FOCUS | 28025.63452 | parameter 6 of focal length (in mm) |  | f32 | csst_ooc_psf_strategy_crds
FSM_STAT | T | working state of fast-steering mirror (FSM) |  | bool | csst_ooc_psf_strategy_crds