ASTROSAT CZTI

Data Quality Report

Orbit 55172

Creation date: 2025-12-09T11:14:47.240842
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_022T16_9000006532_55172cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55172cztM0_level2_quad_clean.evt
Size (bytes)152,328,96039,427,200
Size145.3 MB 37.6 MB
Events in quadrant A1,434,770251,163
Events in quadrant B1,216,934275,469
Events in quadrant C1,518,950241,045
Events in quadrant D1,249,140226,678

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08723
B08423
C08626
D08417

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A096503258
B083572493
C096623065
D092253281

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0112
B090
C0123
D0112

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2771592.129195%
B2791291.039054%
C2799582.072169%
D2745180.655738%

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 7806 3031 25 25 0.32% 0.82%
B 7802 3047 4 4 0.05% 0.13%
C 7804 3047 32 32 0.41% 1.05%
D 7805 3011 5 5 0.06% 0.17%

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 3 78 249333 3353.95 292 285 74.3
A 3 45 17705 234.6 292 285 74.3
A 4 3 14005 184.77 292 285 74.3
B 5 185 26622 403.89 297 287 65.2
B 12 111 7973 117.88 297 287 65.2
B 14 111 7534 111.15 297 287 65.2
C 13 3 82180 1018.54 286 283 80.4
C 6 223 70186 869.37 286 283 80.4
C 1 16 65187 807.2 286 283 80.4
D 11 129 87102 1074.9 279 266 80.8
D 2 249 23284 284.93 279 266 80.8
D 5 173 17385 211.91 279 266 80.8

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