ASTROSAT CZTI

Data Quality Report

Orbit 20210923_T04_059T01_9000004704_level2

Creation date: 2025-12-29T08:20:17.000648
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_059T01_9000004704cztM0_level2.fits modeM0/AS1T04_059T01_9000004704cztM0_level2_quad_clean.evt
Size (bytes)1,831,366,0801,435,988,160
Size1.7 GB 1.3 GB
Events in quadrant A12,234,7229,202,584
Events in quadrant B10,356,5166,819,983
Events in quadrant C9,178,3226,104,749
Events in quadrant D10,070,7627,785,126

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04173000
B08958020
C08016520
D05630180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03170
B03170
C03170
D03170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040420
B040420
C040420
D040420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19807925481.286355%
B1980634820124.336196%
C1980616025430.421941%
D198068101035.100773%

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 248136 198094 0 0 0.00% 0.00%
B 248136 197983 0 0 0.00% 0.00%
C 248136 192815 0 0 0.00% 0.00%
D 248136 197981 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 12014 11.66 3188 3000 773.3
A 7 110 9610 8.55 3188 3000 773.3
A 0 30 9396 8.27 3188 3000 773.3
B 2 9 8355 10.74 2744 2631 532.9
B 2 8 6974 8.15 2744 2631 532.9
B 3 80 6959 8.12 2744 2631 532.9
C 12 241 6407 6.78 2433 2279 608.8
C 9 209 6171 6.39 2433 2279 608.8
C 9 242 6133 6.33 2433 2279 608.8
D 10 189 7279 6.09 2886 2628 763.6
D 6 231 7244 6.04 2886 2628 763.6
D 3 14 7196 5.98 2886 2628 763.6

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