ASTROSAT CZTI

Data Quality Report

Orbit 20211228_T04_091T01_9000004822_level2

Creation date: 2021-12-30T10:00:24.758523
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/AS1T04_091T01_9000004822cztM0_level2_bc.evt modeM0/AS1T04_091T01_9000004822cztM0_level2_quad_clean.evt
Size (bytes)1,914,572,160396,457,920
Size1.8 GB 378.1 MB
Events in quadrant A12,504,5582,451,734
Events in quadrant B9,861,6332,574,810
Events in quadrant C10,057,5022,590,916
Events in quadrant D23,576,3592,384,241

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05960
B05900
C05960
D05900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0924540
B0740000
C0717280
D01167760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01410
B01440
C01400
D01390

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A29178388213.304545%
B292438682.968232%
C292544321.476721%
D2903424448.417717%

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 42487 29585 126 126 0.30% 0.43%
B 42487 29668 31 31 0.07% 0.10%
C 42487 29661 138 138 0.32% 0.47%
D 42474 29401 304 304 0.72% 1.03%

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 15 237 6379747 19038.62 1541 1522 335.0
A 13 6 77414 226.53 1541 1522 335.0
A 13 254 45926 132.54 1541 1522 335.0
B 5 172 2168018 6834.79 1641 1612 317.0
B 4 251 189489 592.73 1641 1612 317.0
B 0 219 182910 571.98 1641 1612 317.0
C 15 214 1174615 3227.32 1626 1623 363.5
C 9 187 634571 1741.47 1626 1623 363.5
C 3 233 608997 1671.1 1626 1623 363.5
D 8 195 8389535 22145.81 1584 1540 378.8
D 12 235 4397044 11604.92 1584 1540 378.8
D 2 250 1803098 4756.44 1584 1540 378.8

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