ASTROSAT CZTI

Data Quality Report

Orbit 20201209_A10_024T01_9000004062_level2

Creation date: 2025-12-18T15:55:46.150617
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/AS1A10_024T01_9000004062cztM0_level2.fits modeM0/AS1A10_024T01_9000004062cztM0_level2_quad_clean.evt
Size (bytes)239,155,200231,099,840
Size228.1 MB 220.4 MB
Events in quadrant A1,475,7801,402,540
Events in quadrant B1,394,7721,381,065
Events in quadrant C1,420,6921,313,880
Events in quadrant D1,209,2581,158,879

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05200
B05200
C05200
D05200

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0523500
B0560700
C0531280
D0837780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A253242771.093824%
B253244121.626915%
C253244271.686148%
D2532416226.404991%

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 27649 25323 0 0 0.00% 0.00%
B 27649 25324 0 0 0.00% 0.00%
C 27649 25324 0 0 0.00% 0.00%
D 27649 25313 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 0 29 1222 8.99 384 360 95.9
A 7 110 1182 8.57 384 360 95.9
A 9 19 1116 7.88 384 360 95.9
B 2 9 1153 10.51 370 352 76.2
B 5 128 967 8.07 370 352 76.2
B 3 17 936 7.66 370 352 76.2
C 12 241 1011 6.88 375 351 96.0
C 2 191 993 6.69 375 351 96.0
C 9 233 977 6.52 375 351 96.0
D 3 14 910 6.3 345 313 94.8
D 10 189 848 5.64 345 313 94.8
D 15 63 835 5.51 345 313 94.8

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