ASTROSAT CZTI

Data Quality Report

Orbit 20200123_A07_138T09_9000003458_level2

Creation date: 2021-08-29T05:57:26.953902
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A07_138T09_9000003458cztM0_level2_bc.evt modeM0/AS1A07_138T09_9000003458cztM0_level2_quad_clean.evt
Size (bytes)4,752,581,7601,701,622,080
Size4.4 GB 1.6 GB
Events in quadrant A26,183,84210,921,030
Events in quadrant B29,257,71611,047,307
Events in quadrant C36,928,83710,598,102
Events in quadrant D43,039,06410,395,241

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025480
B025500
C025480
D025460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02070
B02070
C02070
D02070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02578280
B02695900
C02947450
D03127570

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1252619310.743248%
B12525615331.223893%
C12525428742.294537%
D12525531622.524450%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 158046 125334 5 5 0.00% 0.00%
B 158046 125326 55 55 0.03% 0.04%
C 158046 125328 85 85 0.05% 0.07%
D 158046 125343 788 788 0.50% 0.63%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 15 174 199072 131.83 6737 6624 1459.8
A 13 254 173923 114.6 6737 6624 1459.8
A 0 226 43633 25.35 6737 6624 1459.8
B 0 189 1782184 1410.88 6744 6590 1258.5
B 0 190 699692 550.73 6744 6590 1258.5
B 0 229 503802 395.08 6744 6590 1258.5
C 0 239 9491280 6245.64 6472 6452 1518.6
C 10 9 1224713 802.21 6472 6452 1518.6
C 7 247 816322 533.29 6472 6452 1518.6
D 1 52 13133977 8497.43 6615 6395 1544.9
D 7 238 2094063 1351.34 6615 6395 1544.9
D 13 104 725545 465.5 6615 6395 1544.9

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter