ASTROSAT CZTI

Data Quality Report

Orbit 20210724_T04_028T01_9000004584_level2

Creation date: 2025-12-27T21:55:48.805677
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/AS1T04_028T01_9000004584cztM0_level2.fits modeM0/AS1T04_028T01_9000004584cztM0_level2_quad_clean.evt
Size (bytes)817,174,080643,561,920
Size779.3 MB 613.7 MB
Events in quadrant A5,175,7723,729,493
Events in quadrant B4,472,2643,294,568
Events in quadrant C4,990,1543,561,809
Events in quadrant D4,354,1983,152,534

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017040
B017000
C017030
D017020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01804790
B03037180
C01861140
D02252810

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01490
B01490
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8388714091.679640%
B837741121413.386015%
C8393125613.051316%
D8392533954.045279%

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 112012 84006 0 0 0.00% 0.00%
B 112012 81865 0 0 0.00% 0.00%
C 112012 84055 0 0 0.00% 0.00%
D 112012 83992 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 4343 9.28 1348 1266 331.6
A 7 110 4116 8.59 1348 1266 331.6
A 9 19 3829 7.73 1348 1266 331.6
B 2 9 3604 10.51 1185 1131 235.2
B 3 80 3022 8.04 1185 1131 235.2
B 5 128 3022 8.04 1185 1131 235.2
C 1 80 3903 7.97 1321 1236 334.6
C 1 81 3888 7.93 1321 1236 334.6
C 12 241 3643 7.19 1321 1236 334.6
D 3 14 3113 5.94 1244 1132 333.5
D 15 47 3087 5.86 1244 1132 333.5
D 10 189 3078 5.83 1244 1132 333.5

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