ASTROSAT CZTI

Data Quality Report

Orbit 57643

Creation date: 2026-05-25T09:38:40.769190
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_125T09_9000006578_57643cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57643cztM0_level2_quad_clean.evt
Size (bytes)507,409,920100,419,840
Size483.9 MB 95.8 MB
Events in quadrant A4,592,780626,932
Events in quadrant B3,631,300720,587
Events in quadrant C4,786,207633,098
Events in quadrant D5,229,649573,979

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0187281
B0156211
C0191391
D0202341

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69826048.650816%
B69831552.219676%
C69833535.055134%
D69835457.804668%

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 7677 6983 351 351 4.57% 5.03%
B 7678 6984 40 40 0.52% 0.57%
C 7678 6984 237 237 3.09% 3.39%
D 7678 6984 449 449 5.85% 6.43%

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 7 223 1622546 8986.93 735 715 180.5
A 3 14 74093 406.6 735 715 180.5
A 10 251 30908 167.3 735 715 180.5
B 0 216 188900 1183.06 745 716 159.1
B 10 247 134627 841.86 745 716 159.1
B 5 172 126791 792.6 745 716 159.1
C 15 224 1606437 8129.04 728 720 197.5
C 14 254 129420 651.55 728 720 197.5
C 10 21 119261 600.12 728 720 197.5
D 8 160 1009260 5002.46 718 686 201.6
D 8 240 996240 4937.88 718 686 201.6
D 5 38 55317 270.97 718 686 201.6

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