ASTROSAT CZTI

Data Quality Report

Orbit 54875

Creation date: 2025-11-19T12:42:58.770308
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/AS1A14_039T06_9000006526_54875cztM0_level2.fits modeM0/AS1A14_039T06_9000006526_54875cztM0_level2_quad_clean.evt
Size (bytes)509,420,160108,181,440
Size485.8 MB 103.2 MB
Events in quadrant A4,824,660691,907
Events in quadrant B4,175,733756,941
Events in quadrant C3,838,171676,242
Events in quadrant D5,428,529622,008

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0194194
B01803011
C0170544
D0216196

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A75973023.975253%
B75961652.172196%
C7598771.013425%
D75973384.449125%

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 9258 7598 232 232 2.51% 3.05%
B 9258 7599 99 99 1.07% 1.30%
C 9259 7601 60 60 0.65% 0.79%
D 9259 7600 323 323 3.49% 4.25%

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 3 14 1004645 5109.01 798 780 196.5
A 7 14 644621 3276.72 798 780 196.5
A 13 254 16951 82.3 798 780 196.5
B 5 185 882516 5178.53 790 761 170.3
B 10 247 132258 772.28 790 761 170.3
B 12 111 20676 116.96 790 761 170.3
C 12 252 274857 1282.41 777 771 213.7
C 6 223 183895 856.81 777 771 213.7
C 14 254 157007 731.01 777 771 213.7
D 11 176 1526681 7040.21 762 728 216.7
D 6 239 335799 1545.9 762 728 216.7
D 10 181 116075 532.17 762 728 216.7

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