ASTROSAT CZTI

Data Quality Report

Orbit 20180220_T02_004T01_9000001910_level2

Creation date: 2025-11-19T16:16:51.252461
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/AS1T02_004T01_9000001910cztM0_level2.fits modeM0/AS1T02_004T01_9000001910cztM0_level2_quad_clean.evt
Size (bytes)291,424,320295,499,520
Size277.9 MB 281.8 MB
Events in quadrant A1,764,3481,803,843
Events in quadrant B1,636,6541,703,709
Events in quadrant C1,770,5881,732,041
Events in quadrant D1,512,7241,569,195

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0702920
B0879620
C0641250
D0788650

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06380
B06380
C06380
D06380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0490
B0490
C0490
D0490

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A311284581.471344%
B3112828689.213570%
C311281780.571832%
D3112812283.945001%

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 36234 31130 0 0 0.00% 0.00%
B 36234 30935 0 0 0.00% 0.00%
C 36234 31130 0 0 0.00% 0.00%
D 36234 31124 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 1712 11.03 459 429 116.3
A 7 110 1509 9.29 459 429 116.3
A 9 19 1340 7.83 459 429 116.3
B 2 9 1367 10.87 432 412 87.9
B 3 17 1118 8.04 432 412 87.9
B 14 254 1094 7.76 432 412 87.9
C 12 241 1351 7.5 468 436 122.0
C 9 233 1178 6.08 468 436 122.0
C 2 191 1163 5.96 468 436 122.0
D 3 14 1124 6.27 430 391 116.9
D 6 231 1061 5.73 430 391 116.9
D 7 3 1048 5.62 430 391 116.9

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