ASTROSAT CZTI

Data Quality Report

Orbit 53939

Creation date: 2025-09-17T12:19:33.207886
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_057T04_9000006508_53939cztM0_level2.fits modeM0/AS1A14_057T04_9000006508_53939cztM0_level2_quad_clean.evt
Size (bytes)870,877,440104,918,400
Size830.5 MB 100.1 MB
Events in quadrant A5,262,281781,181
Events in quadrant B4,311,853837,839
Events in quadrant C3,968,207769,122
Events in quadrant D18,037,994201,157

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0216511
B0188871
C0181821
D0593901

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01720
B01720
C01720
D01720

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A84523383.999053%
B84523383.999053%
C84531361.608896%
D8453629974.517923%

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 8967 8453 93 93 1.04% 1.10%
B 8967 8453 31 31 0.35% 0.37%
C 8968 8454 16 16 0.18% 0.19%
D 8968 8454 5375 5375 59.94% 63.58%

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 14 235 515639 2190.71 961 939 234.9
A 4 249 356730 1514.34 961 939 234.9
A 15 174 254736 1080.23 961 939 234.9
B 0 213 247581 1193.49 954 921 206.7
B 5 236 99734 478.12 954 921 206.7
B 2 249 37508 177.03 954 921 206.7
C 12 2 54145 207.64 944 936 256.3
C 14 246 51759 198.33 944 936 256.3
C 14 254 32011 121.27 944 936 256.3
D 8 176 13532958 100771.51 462 440 134.3
D 10 172 972115 7235.69 462 440 134.3
D 0 129 960451 7148.83 462 440 134.3

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