ASTROSAT CZTI

Data Quality Report

Orbit 55688

Creation date: 2026-01-16T09:55:26.045660
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_55688cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55688cztM0_level2_quad_clean.evt
Size (bytes)652,262,40092,658,240
Size622.0 MB 88.4 MB
Events in quadrant A11,167,688470,594
Events in quadrant B3,184,603683,639
Events in quadrant C4,236,435603,501
Events in quadrant D5,015,678561,311

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0380272
B0146692
C0175442
D0198953

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6973212930.532052%
B6973430.616664%
C69731852.653090%
D69723204.589788%

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 7838 6974 2228 2228 28.43% 31.95%
B 7838 6974 11 11 0.14% 0.16%
C 7838 6974 155 155 1.98% 2.22%
D 7837 6973 297 297 3.79% 4.26%

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 12 115 8144237 51129.65 641 623 159.3
A 7 64 180819 1131.36 641 623 159.3
A 0 8 163328 1021.54 641 623 159.3
B 4 206 126927 810.42 712 684 155.8
B 5 172 110439 704.58 712 684 155.8
B 0 199 53716 340.44 712 684 155.8
C 9 38 800551 4073.75 704 695 196.3
C 15 147 547418 2784.52 704 695 196.3
C 13 3 53705 269.99 704 695 196.3
D 11 129 1494640 7549.89 693 662 197.9
D 8 245 409608 2066.63 693 662 197.9
D 10 181 202855 1021.79 693 662 197.9

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