ASTROSAT CZTI

Data Quality Report

Orbit 55834

Creation date: 2026-01-23T01:36:49.096470
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_127T10_9000006542_55834cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55834cztM0_level2_quad_clean.evt
Size (bytes)441,866,88097,845,120
Size421.4 MB 93.3 MB
Events in quadrant A3,731,880635,758
Events in quadrant B3,015,727690,361
Events in quadrant C3,012,033618,138
Events in quadrant D6,064,740541,961

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0158922
B0144482
C0144322
D0229252

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68401692.470760%
B6840610.891813%
C6840320.467836%
D684068810.058480%

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 7795 6841 135 135 1.73% 1.97%
B 7795 6841 29 29 0.37% 0.42%
C 7795 6841 24 24 0.31% 0.35%
D 7795 6840 658 658 8.44% 9.62%

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 495308 2854.2 688 671 173.3
A 8 192 209709 1206.21 688 671 173.3
A 0 8 132820 762.54 688 671 173.3
B 5 185 155681 1045.64 686 661 148.3
B 0 213 68333 456.46 686 661 148.3
B 10 247 44223 293.83 686 661 148.3
C 13 3 130765 686.98 681 677 189.4
C 12 250 72813 380.94 681 677 189.4
C 6 223 70703 369.8 681 677 189.4
D 11 129 2113415 11428.13 650 623 184.9
D 2 62 825982 4464.38 650 623 184.9
D 2 249 192855 1039.79 650 623 184.9

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