ASTROSAT CZTI

Data Quality Report

Orbit 55636

Creation date: 2026-01-13T13:36:54.960688
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_021T06_9000006538_55636cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55636cztM0_level2_quad_clean.evt
Size (bytes)458,472,96091,765,440
Size437.2 MB 87.5 MB
Events in quadrant A6,505,878535,467
Events in quadrant B2,721,693671,120
Events in quadrant C2,927,274587,036
Events in quadrant D4,310,271531,460

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0238181
B0132571
C0139621
D0176031

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6504105816.266913%
B6505671.029977%
C6504440.676507%
D65043475.335178%

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 7554 6504 998 998 13.21% 15.34%
B 7555 6506 3 3 0.04% 0.05%
C 7554 6505 33 33 0.44% 0.51%
D 7554 6505 285 285 3.77% 4.38%

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 12 115 3283446 20717.23 638 621 158.5
A 8 249 245799 1547.27 638 621 158.5
A 15 32 231514 1457.12 638 621 158.5
B 10 247 28520 194.69 669 644 143.2
B 5 185 23386 158.83 669 644 143.2
B 12 111 17103 114.95 669 644 143.2
C 13 3 218283 1225.52 648 643 177.6
C 6 223 68318 381.07 648 643 177.6
C 12 250 55987 311.64 648 643 177.6
D 11 129 861156 4725.05 636 606 182.1
D 15 234 529721 2905.23 636 606 182.1
D 2 31 138826 758.93 636 606 182.1

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