ASTROSAT CZTI

Data Quality Report

Orbit 55481

Creation date: 2025-12-30T14:49:47.148062
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_099T01_9000006536_55481cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55481cztM0_level2_quad_clean.evt
Size (bytes)551,177,280112,271,040
Size525.6 MB 107.1 MB
Events in quadrant A4,022,701745,154
Events in quadrant B3,704,535803,222
Events in quadrant C5,044,682661,163
Events in quadrant D7,006,435631,216

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01644
B01644
C01642
D01644

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018405334
B017325290
C021625449
D027377735

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A80441391.727996%
B8043360.447594%
C80406588.184080%
D80217479.313053%

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 8148 8081 89 89 1.09% 1.10%
B 8143 8076 12 12 0.15% 0.15%
C 8143 8074 519 519 6.37% 6.43%
D 8082 8051 689 689 8.53% 8.56%

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 8 63 154301 730.88 845 824 210.0
A 0 8 149193 706.56 845 824 210.0
A 3 45 130330 616.73 845 824 210.0
B 5 236 93132 516.85 841 810 178.6
B 10 247 69463 384.35 841 810 178.6
B 7 252 66328 366.79 841 810 178.6
C 13 3 1642296 7489.01 801 792 219.2
C 12 252 101993 461.71 801 792 219.2
C 1 16 42925 192.22 801 792 219.2
D 11 129 1887493 8378.11 795 757 225.2
D 6 239 522853 2318.38 795 757 225.2
D 2 249 319626 1415.95 795 757 225.2

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