ASTROSAT CZTI

Data Quality Report

Orbit 52275

Creation date: 2025-07-22T00:30:14.175263
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/AS1C09_011T05_9000006474_52275cztM0_level2.fits modeM0/AS1C09_011T05_9000006474_52275cztM0_level2_quad_clean.evt
Size (bytes)3,861,938,880314,539,200
Size3.6 GB 300.0 MB
Events in quadrant A17,816,8092,603,617
Events in quadrant B25,871,0892,782,841
Events in quadrant C64,101,419149,367
Events in quadrant D32,916,2091,980,305

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0737315
B0971205
C02103245
D01185275

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05920
B05920
C05920
D05920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2917313204.524732%
B2917318876.468310%
C291732777395.201042%
D29174626021.457462%

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 32138 29178 981 981 3.05% 3.36%
B 32138 29178 1109 1109 3.45% 3.80%
C 32138 29174 21795 21795 67.82% 74.71%
D 32139 29178 4646 4646 14.46% 15.92%

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 7 206 2889135 3901.08 2975 2902 739.9
A 4 249 685704 922.89 2975 2902 739.9
A 11 3 372602 499.69 2975 2902 739.9
B 10 254 6729180 10853.71 2960 2852 619.7
B 4 171 2375120 3827.93 2960 2852 619.7
B 7 0 960952 1546.0 2960 2852 619.7
C 15 158 25704529 90210.35 1017 1007 284.9
C 15 178 24556353 86180.65 1017 1007 284.9
C 15 224 6150899 21583.96 1017 1007 284.9
D 15 93 5132637 6941.38 2605 2494 739.1
D 12 18 4901011 6627.98 2605 2494 739.1
D 7 60 2807238 3794.98 2605 2494 739.1

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