ASTROSAT CZTI

Data Quality Report

Orbit 56900

Creation date: 2026-04-04T17:15:51.440230
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/AS1A14_083T14_9000006564_56900cztM0_level2.fits modeM0/AS1A14_083T14_9000006564_56900cztM0_level2_quad_clean.evt
Size (bytes)516,648,96089,939,520
Size492.7 MB 85.8 MB
Events in quadrant A2,971,402628,493
Events in quadrant B5,524,367580,755
Events in quadrant C3,683,938591,352
Events in quadrant D6,442,589472,042

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0137401
B0209671
C0157521
D0235181

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64571191.842961%
B6457103215.982654%
C64582433.762775%
D6458124019.200991%

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 7542 6458 36 36 0.48% 0.56%
B 7542 6458 697 697 9.24% 10.79%
C 7543 6459 124 124 1.64% 1.92%
D 7543 6459 1019 1019 13.51% 15.78%

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 4 13 136784 792.26 691 673 171.8
A 6 211 52780 303.3 691 673 171.8
A 3 14 38183 218.34 691 673 171.8
B 5 185 1742745 13099.39 626 604 133.0
B 10 16 786366 5908.25 626 604 133.0
B 1 127 165331 1238.6 626 604 133.0
C 13 3 718213 3969.48 660 654 180.8
C 14 254 120860 664.97 660 654 180.8
C 14 96 88828 487.77 660 654 180.8
D 2 249 1409483 8097.45 620 592 174.0
D 7 62 955839 5490.18 620 592 174.0
D 8 240 528601 3034.68 620 592 174.0

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