ASTROSAT CZTI

Data Quality Report

Orbit 20200801_A09_012T04_9000003784_level2

Creation date: 2025-12-14T03:13:05.011284
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/AS1A09_012T04_9000003784cztM0_level2.fits modeM0/AS1A09_012T04_9000003784cztM0_level2_quad_clean.evt
Size (bytes)102,983,040126,383,040
Size98.2 MB 120.5 MB
Events in quadrant A620,268790,223
Events in quadrant B601,584797,010
Events in quadrant C615,148778,637
Events in quadrant D534,528714,530

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02200
B02200
C02200
D02200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0242440
B0226450
C0236450
D0311680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A107873533.272458%
B107873032.808937%
C107873162.929452%
D107876425.951608%

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 11336 10785 0 0 0.00% 0.00%
B 11337 10786 0 0 0.00% 0.00%
C 11337 10787 0 0 0.00% 0.00%
D 11336 10785 0 0 0.00% 0.00%

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 0 29 520 8.66 161 151 42.6
A 0 30 478 7.67 161 151 42.6
A 7 110 475 7.6 161 151 42.6
B 2 9 505 10.66 158 151 33.2
B 3 17 420 8.1 158 151 33.2
B 2 8 415 7.95 158 151 33.2
C 12 241 470 7.47 162 151 42.7
C 3 187 422 6.35 162 151 42.7
C 12 249 417 6.23 162 151 42.7
D 3 14 407 6.32 152 138 42.5
D 15 46 373 5.52 152 138 42.5
D 6 231 372 5.5 152 138 42.5

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