ASTROSAT CZTI

Data Quality Report

Orbit 20210904_T04_051T01_9000004686_level2

Creation date: 2025-12-28T20:49:37.620124
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_051T01_9000004686cztM0_level2.fits modeM0/AS1T04_051T01_9000004686cztM0_level2_quad_clean.evt
Size (bytes)2,621,111,0402,101,789,440
Size2.4 GB 2.0 GB
Events in quadrant A16,774,80012,494,977
Events in quadrant B14,906,84211,136,442
Events in quadrant C16,085,60811,898,344
Events in quadrant D13,789,78810,313,772

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04190
B04190
C04190
D04190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05434340
B09970190
C05951930
D08667880

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A054180
B053380
C053300
D053340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A25977828041.079383%
B2595363117012.009895%
C259767104934.039389%
D259607191127.361897%

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 336485 260038 0 0 0.00% 0.00%
B 336485 259706 0 0 0.00% 0.00%
C 336485 259922 0 0 0.00% 0.00%
D 336485 259758 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 16348 11.65 4374 4127 1049.5
A 7 110 13141 8.59 4374 4127 1049.5
A 0 30 12963 8.42 4374 4127 1049.5
B 2 9 11937 10.78 3950 3790 755.6
B 2 8 10068 8.31 3950 3790 755.6
B 3 80 9833 8.0 3950 3790 755.6
C 3 187 11001 6.63 4269 4028 1051.9
C 12 241 10998 6.63 4269 4028 1051.9
C 9 209 10975 6.6 4269 4028 1051.9
D 10 189 9997 6.24 3949 3610 1023.0
D 6 67 9782 6.03 3949 3610 1023.0
D 7 3 9672 5.93 3949 3610 1023.0

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