ASTROSAT CZTI

Data Quality Report

Orbit 20210417_A10_071T04_9000004316_level2

Creation date: 2025-12-24T19:16:07.427878
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/AS1A10_071T04_9000004316cztM0_level2.fits modeM0/AS1A10_071T04_9000004316cztM0_level2_quad_clean.evt
Size (bytes)605,741,760448,729,920
Size577.7 MB 427.9 MB
Events in quadrant A3,826,3862,519,760
Events in quadrant B3,583,2922,480,557
Events in quadrant C3,624,6482,336,917
Events in quadrant D3,239,9282,178,608

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0990
B0990
C0990
D0990

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012080
B012080
C012080
D012080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01243530
B01799550
C01278030
D01313940

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A593587231.218033%
B5935812532.110920%
C5935813812.326561%
D593585710.961960%

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 69098 59359 0 0 0.00% 0.00%
B 69098 59357 0 0 0.00% 0.00%
C 69098 59355 0 0 0.00% 0.00%
D 69098 59358 0 0 0.00% 0.00%

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 29 3667 11.24 996 937 242.9
A 7 110 2983 8.42 996 937 242.9
A 0 30 2934 8.22 996 937 242.9
B 2 9 2813 10.1 946 904 188.9
B 2 8 2422 8.03 946 904 188.9
B 3 80 2347 7.64 946 904 188.9
C 1 81 2803 7.92 957 895 241.0
C 1 80 2781 7.82 957 895 241.0
C 9 209 2475 6.56 957 895 241.0
D 15 46 2352 6.19 925 845 243.3
D 10 189 2311 6.02 925 845 243.3
D 6 67 2300 5.98 925 845 243.3

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