ASTROSAT CZTI

Data Quality Report

Orbit 20180725_A04_207T01_9000002254_level2

Creation date: 2025-11-23T17:32:41.818121
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/AS1A04_207T01_9000002254cztM0_level2.fits modeM0/AS1A04_207T01_9000002254cztM0_level2_quad_clean.evt
Size (bytes)896,158,080838,569,600
Size854.6 MB 799.7 MB
Events in quadrant A5,446,6384,935,683
Events in quadrant B5,191,1824,854,863
Events in quadrant C5,337,8564,754,020
Events in quadrant D4,651,8324,339,490

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019360
B019360
C019360
D019360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02017710
B02178340
C02132760
D02120180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01310
B01310
C01310
D01310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A949989661.016864%
B9500124812.611551%
C950018240.867359%
D9500018481.945263%

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 108203 94984 0 0 0.00% 0.00%
B 108203 94924 0 0 0.00% 0.00%
C 108203 94988 0 0 0.00% 0.00%
D 108203 94971 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 5359 11.61 1417 1326 347.3
A 7 110 4527 9.22 1417 1326 347.3
A 0 30 4129 8.07 1417 1326 347.3
B 2 9 4061 10.25 1373 1308 268.7
B 3 17 3514 8.21 1373 1308 268.7
B 2 8 3462 8.02 1373 1308 268.7
C 12 241 3827 6.92 1410 1307 364.3
C 2 191 3590 6.27 1410 1307 364.3
C 3 126 3514 6.06 1410 1307 364.3
D 3 14 3454 6.31 1325 1200 356.9
D 6 231 3350 6.02 1325 1200 356.9
D 3 31 3273 5.81 1325 1200 356.9

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