ASTROSAT CZTI

Data Quality Report

Orbit 20200629_A09_008T06_9000003748_level2

Creation date: 2025-12-13T04:55:08.769199
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/AS1A09_008T06_9000003748cztM0_level2.fits modeM0/AS1A09_008T06_9000003748cztM0_level2_quad_clean.evt
Size (bytes)1,515,409,9201,243,713,600
Size1.4 GB 1.2 GB
Events in quadrant A9,483,5767,245,756
Events in quadrant B9,191,1427,397,055
Events in quadrant C9,374,2066,984,167
Events in quadrant D7,573,3985,772,596

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03263990
B03259990
C03251430
D04878090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030640
B030680
C030640
D030620

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02570
B02570
C02570
D02570

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14973031722.118480%
B14982925571.706612%
C14989534492.300944%
D1496381715611.465002%

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 179589 150219 0 0 0.00% 0.00%
B 179589 150515 0 0 0.00% 0.00%
C 179589 150549 0 0 0.00% 0.00%
D 179589 146849 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 7784 9.13 2471 2323 597.9
A 7 110 7545 8.73 2471 2323 597.9
A 9 19 6987 7.8 2471 2323 597.9
B 2 9 7404 10.8 2431 2327 469.9
B 2 8 6216 8.28 2431 2327 469.9
B 5 128 6021 7.86 2431 2327 469.9
C 12 241 6493 6.67 2481 2327 624.8
C 9 209 6258 6.29 2481 2327 624.8
C 3 126 6202 6.2 2481 2327 624.8
D 6 231 5452 6.13 2168 1977 566.8
D 7 3 5415 6.07 2168 1977 566.8
D 10 189 5367 5.98 2168 1977 566.8

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