ASTROSAT CZTI

Data Quality Report

Orbit 20851

Creation date: 2024-06-27T18:20:23.100308
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/AS1C04_001T01_9000003074_20851cztM0_level2.evt modeM0/AS1C04_001T01_9000003074_20851cztM0_level2_quad_clean.evt
Size (bytes)785,468,160164,315,520
Size749.1 MB 156.7 MB
Events in quadrant A4,767,2461,097,813
Events in quadrant B5,096,8591,084,249
Events in quadrant C4,697,4591,053,977
Events in quadrant D8,526,2771,023,930

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0213742
B0223482
C0210932
D0324522

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B060
C060
D060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02100
B02100
C02100
D02100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10345340.328661%
B103451051.014983%
C10345900.869986%
D103452822.725955%

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 10884 10344 10 10 0.09% 0.10%
B 10884 10344 32 32 0.29% 0.31%
C 10884 10344 5 5 0.05% 0.05%
D 10884 10344 200 200 1.84% 1.93%

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 5 16 162349 671.73 1193 1168 239.9
A 10 253 13227 50.26 1193 1168 239.9
A 0 226 10533 39.03 1193 1168 239.9
B 7 220 200202 896.53 1181 1150 222.0
B 0 190 88850 395.0 1181 1150 222.0
B 4 216 45084 197.88 1181 1150 222.0
C 14 238 180790 676.13 1142 1149 265.7
C 0 207 33008 119.91 1142 1149 265.7
C 3 233 24702 88.65 1142 1149 265.7
D 1 20 2792785 9963.78 1157 1126 280.2
D 1 239 902599 3217.47 1157 1126 280.2
D 13 153 135839 480.81 1157 1126 280.2

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