ASTROSAT CZTI

Data Quality Report

Orbit 55717

Creation date: 2026-01-16T10:39:13.934163
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_099T04_9000006540_55717cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55717cztM0_level2_quad_clean.evt
Size (bytes)530,452,80092,954,880
Size505.9 MB 88.6 MB
Events in quadrant A7,466,565521,660
Events in quadrant B2,978,971671,501
Events in quadrant C3,825,419599,242
Events in quadrant D4,837,106548,929

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0268491
B0140781
C0162241
D0191491

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6792140620.700824%
B6793180.264979%
C6793861.266009%
D67933555.225968%

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 7637 6793 1213 1213 15.88% 17.86%
B 7638 6794 2 2 0.03% 0.03%
C 7638 6794 54 54 0.71% 0.79%
D 7638 6794 335 335 4.39% 4.93%

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 15 32 4265302 26588.88 646 628 160.4
A 7 64 357276 2223.58 646 628 160.4
A 4 249 77500 479.27 646 628 160.4
B 5 236 119644 794.03 698 671 149.8
B 5 248 26033 169.26 698 671 149.8
B 12 111 18571 119.46 698 671 149.8
C 15 208 515777 2703.85 690 683 190.5
C 6 223 179901 940.76 690 683 190.5
C 12 249 103312 538.72 690 683 190.5
D 11 129 1939925 10116.25 675 645 191.7
D 10 181 75197 388.9 675 645 191.7
D 7 129 62203 321.12 675 645 191.7

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