ASTROSAT CZTI

Data Quality Report

Orbit 51974

Creation date: 2025-05-08T04:16:10.485263
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/AS1C09_011T06_9000006468_51974cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51974cztM0_level2_quad_clean.evt
Size (bytes)728,821,44085,734,720
Size695.1 MB 81.8 MB
Events in quadrant A5,986,091551,523
Events in quadrant B5,010,676637,455
Events in quadrant C8,776,083448,098
Events in quadrant D6,714,859515,347

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0223062
B0192782
C0304612
D0243962

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A634790914.321727%
B63464917.737157%
C6346206832.587457%
D634681412.826978%

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 7533 6349 699 699 9.28% 11.01%
B 7532 6348 256 256 3.40% 4.03%
C 7532 6348 1542 1542 20.47% 24.29%
D 7532 6348 771 771 10.24% 12.15%

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 7 64 1122928 7106.58 632 615 157.9
A 8 249 1114690 7054.41 632 615 157.9
A 4 249 444070 2807.99 632 615 157.9
B 8 128 352137 2520.66 661 639 139.4
B 5 250 331886 2375.44 661 639 139.4
B 4 170 327585 2344.59 661 639 139.4
C 15 224 5543592 34749.54 573 568 159.5
C 4 5 276851 1732.03 573 568 159.5
C 13 3 250719 1568.21 573 568 159.5
D 6 42 2736516 14991.89 637 610 182.5
D 3 12 298409 1631.84 637 610 182.5
D 7 96 188212 1028.0 637 610 182.5

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