ASTROSAT CZTI

Data Quality Report

Orbit 20210518_A10_058T04_9000004382_level2

Creation date: 2025-12-25T21:11:42.232781
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_058T04_9000004382cztM0_level2.fits modeM0/AS1A10_058T04_9000004382cztM0_level2_quad_clean.evt
Size (bytes)736,433,280633,841,920
Size702.3 MB 604.5 MB
Events in quadrant A4,762,7463,997,588
Events in quadrant B4,420,1663,899,244
Events in quadrant C4,516,2543,693,638
Events in quadrant D3,446,1222,454,077

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015340
B015340
C015340
D015340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01190
B01190
C01190
D01190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01608270
B02338890
C01705520
D02719370

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A750938901.185197%
B7509319972.659369%
C7509317912.385043%
D750931622921.611868%

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 87179 75093 0 0 0.00% 0.00%
B 87179 75088 0 0 0.00% 0.00%
C 87179 75090 0 0 0.00% 0.00%
D 87179 71626 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 3918 9.23 1240 1170 297.6
A 7 110 3804 8.85 1240 1170 297.6
A 9 19 3568 8.06 1240 1170 297.6
B 2 9 3546 10.43 1170 1119 232.6
B 3 80 2961 7.92 1170 1119 232.6
B 5 128 2960 7.91 1170 1119 232.6
C 1 80 3573 8.13 1193 1118 301.9
C 1 81 3477 7.81 1193 1118 301.9
C 12 241 3175 6.81 1193 1118 301.9
D 15 46 2651 6.77 986 902 258.3
D 10 189 2517 6.25 986 902 258.3
D 6 67 2436 5.94 986 902 258.3

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