ASTROSAT CZTI

Data Quality Report

Orbit 55042

Creation date: 2025-12-02T02:09:39.512544
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_025T01_9000006530_55042cztM0_level2.fits modeM0/AS1A14_025T01_9000006530_55042cztM0_level2_quad_clean.evt
Size (bytes)4,408,525,440519,039,360
Size4.1 GB 495.0 MB
Events in quadrant A36,878,1793,605,244
Events in quadrant B20,415,3334,313,515
Events in quadrant C20,314,6993,783,233
Events in quadrant D82,389,7691,173,396

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01414632873
B0924091571
C0946873581
D02823109601

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A085814
B086018
C08626
D086414

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0740
B0740
C0740
D0740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A41443506912.231257%
B415767171.724553%
C414337561.824633%
D407792761767.723583%

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 51242 42138 3826 3826 7.47% 9.08%
B 51243 42225 143 143 0.28% 0.34%
C 51242 42051 417 417 0.81% 0.99%
D 51241 41588 22172 22172 43.27% 53.31%

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 32 15879924 15030.1 4328 4233 1056.3
A 0 8 2815824 2661.84 4328 4233 1056.3
A 3 95 789217 743.17 4328 4233 1056.3
B 5 236 662552 686.14 4496 4320 959.3
B 5 185 534985 553.16 4496 4320 959.3
B 4 81 443368 457.66 4496 4320 959.3
C 13 3 1322935 1097.87 4394 4361 1201.0
C 6 223 467381 385.52 4394 4361 1201.0
C 12 252 428545 353.18 4394 4361 1201.0
D 11 129 31210931 42553.25 2544 2428 733.4
D 15 94 30869917 42088.27 2544 2428 733.4
D 15 93 2895140 3944.25 2544 2428 733.4

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