ASTROSAT CZTI

Data Quality Report

Orbit 20200628_A09_008T03_9000003746_level2

Creation date: 2025-12-13T04:06:09.075817
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_008T03_9000003746cztM0_level2.fits modeM0/AS1A09_008T03_9000003746cztM0_level2_quad_clean.evt
Size (bytes)907,744,320604,031,040
Size865.7 MB 576.0 MB
Events in quadrant A5,366,2762,559,718
Events in quadrant B5,549,9803,422,516
Events in quadrant C5,542,6623,195,138
Events in quadrant D4,782,5622,868,737

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01740
B01740
C01740
D01740

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018860
B018860
C018860
D018860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02761540
B01940100
C01966020
D02423270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A907541199713.219252%
B9105812461.368359%
C9107220612.263045%
D9105842404.656373%

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 111031 90463 0 0 0.00% 0.00%
B 111031 91082 0 0 0.00% 0.00%
C 111031 91090 0 0 0.00% 0.00%
D 111031 91043 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 4468 9.22 1399 1316 341.8
A 7 110 4329 8.82 1399 1316 341.8
A 9 19 3981 7.8 1399 1316 341.8
B 2 9 4329 10.14 1468 1401 288.7
B 3 80 3672 7.87 1468 1401 288.7
B 2 8 3656 7.81 1468 1401 288.7
C 1 80 4200 7.61 1463 1367 372.2
C 1 81 4155 7.49 1463 1367 372.2
C 12 241 3899 6.8 1463 1367 372.2
D 3 14 3534 6.3 1362 1240 363.9
D 15 46 3478 6.15 1362 1240 363.9
D 10 189 3440 6.05 1362 1240 363.9

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