ASTROSAT CZTI

Data Quality Report

Orbit 20170315_A02_027T01_9000001084_level2

Creation date: 2025-11-10T03:03:54.216944
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/AS1A02_027T01_9000001084cztM0_level2.fits modeM0/AS1A02_027T01_9000001084cztM0_level2_quad_clean.evt
Size (bytes)926,740,800989,193,600
Size883.8 MB 943.4 MB
Events in quadrant A5,525,4305,872,222
Events in quadrant B5,436,5026,006,619
Events in quadrant C5,554,8585,910,094
Events in quadrant D4,774,3345,397,232

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020100
B020100
C020110
D020100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02083590
B02153090
C02343610
D02232590

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01730
B01730
C01730
D01730

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9884214591.476093%
B9884119151.937455%
C9883819741.997208%
D9884317271.747215%

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 116099 98871 0 0 0.00% 0.00%
B 116099 98868 0 0 0.00% 0.00%
C 116099 98870 0 0 0.00% 0.00%
D 116099 98866 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 5349 10.97 1438 1339 365.7
A 7 110 4674 9.12 1438 1339 365.7
A 0 30 4136 7.65 1438 1339 365.7
B 2 9 4836 12.53 1429 1360 277.4
B 2 8 3639 8.22 1429 1360 277.4
B 14 254 3623 8.16 1429 1360 277.4
C 1 80 4150 7.16 1467 1357 390.0
C 1 81 4108 7.05 1467 1357 390.0
C 12 241 3853 6.4 1467 1357 390.0
D 6 231 3477 6.14 1365 1238 364.8
D 11 82 3380 5.87 1365 1238 364.8
D 7 5 3369 5.84 1365 1238 364.8

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