ASTROSAT CZTI

Data Quality Report

Orbit 55420

Creation date: 2025-12-26T04:33:45.275888
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_55420cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55420cztM0_level2_quad_clean.evt
Size (bytes)682,758,72095,135,040
Size651.1 MB 90.7 MB
Events in quadrant A3,489,211675,088
Events in quadrant B4,080,602706,112
Events in quadrant C4,242,042628,255
Events in quadrant D12,909,111374,999

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0157792
B0175432
C0179002
D0432575

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71231001.403903%
B71232543.565913%
C71232954.141513%
D7122313043.948329%

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 7603 7124 43 43 0.57% 0.60%
B 7603 7124 75 75 0.99% 1.05%
C 7603 7124 225 225 2.96% 3.16%
D 7602 7123 2844 2844 37.41% 39.93%

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 0 8 303623 1628.47 752 731 186.0
A 7 7 79658 424.34 752 731 186.0
A 12 115 62831 333.87 752 731 186.0
B 5 236 716032 4556.83 743 717 157.0
B 5 185 134903 854.82 743 717 157.0
B 10 247 103137 652.45 743 717 157.0
C 12 252 896353 4466.28 732 725 200.5
C 13 3 149049 739.66 732 725 200.5
C 14 254 67428 332.63 732 725 200.5
D 11 129 5044859 29321.01 602 574 172.0
D 8 48 4576686 26599.65 602 574 172.0
D 2 62 247712 1436.54 602 574 172.0

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