ASTROSAT CZTI

Data Quality Report

Orbit 20220107_T04_074T01_9000004852_level2

Creation date: 2025-12-31T07:55:24.794248
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/AS1T04_074T01_9000004852cztM0_level2.fits modeM0/AS1T04_074T01_9000004852cztM0_level2_quad_clean.evt
Size (bytes)229,979,520170,484,480
Size219.3 MB 162.6 MB
Events in quadrant A1,422,466947,067
Events in quadrant B1,347,876909,230
Events in quadrant C1,383,428900,399
Events in quadrant D1,136,482731,133

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04960
B04960
C04960
D04960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0780
B0780
C0780
D0780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0537480
B0598630
C0542900
D0885210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A243254671.919836%
B243257953.268243%
C243251960.805755%
D24325255710.511819%

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 32059 24323 0 0 0.00% 0.00%
B 32059 24315 0 0 0.00% 0.00%
C 32059 24324 0 0 0.00% 0.00%
D 32059 24292 0 0 0.00% 0.00%

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 9 19 1149 8.55 371 348 93.7
A 7 110 1148 8.54 371 348 93.7
A 0 29 1101 8.04 371 348 93.7
B 2 9 1202 11.96 357 340 72.1
B 3 80 1046 9.8 357 340 72.1
B 2 8 1002 9.19 357 340 72.1
C 1 81 1149 8.48 366 344 94.9
C 1 80 1129 8.27 366 344 94.9
C 3 158 953 6.42 366 344 94.9
D 6 62 836 6.16 325 296 87.7
D 10 113 825 6.03 325 296 87.7
D 7 3 820 5.97 325 296 87.7

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