ASTROSAT CZTI

Data Quality Report

Orbit 55781

Creation date: 2026-01-20T11:29:13.538693
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_55781cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55781cztM0_level2_quad_clean.evt
Size (bytes)542,234,88095,186,880
Size517.1 MB 90.8 MB
Events in quadrant A5,371,050609,713
Events in quadrant B3,236,313696,989
Events in quadrant C3,012,687630,967
Events in quadrant D7,941,495486,365

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0204022
B0136962
C0140002
D0281632

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0190
C0190
D0190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65774586.963661%
B6577791.201156%
C6577550.836248%
D6577129519.689828%

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 7726 6578 311 311 4.03% 4.73%
B 7726 6576 0 0 0.00% 0.00%
C 7726 6576 42 42 0.54% 0.64%
D 7726 6576 1355 1355 17.54% 20.61%

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 852284 4918.87 696 678 173.1
A 7 64 658310 3798.47 696 678 173.1
A 0 8 246098 1417.54 696 678 173.1
B 5 172 351925 2282.59 711 684 153.9
B 7 0 40689 259.98 711 684 153.9
B 12 111 18503 115.8 711 684 153.9
C 12 250 116710 600.49 701 694 193.2
C 14 254 40153 204.24 701 694 193.2
C 6 223 38739 196.92 701 694 193.2
D 11 129 4200304 23222.35 636 608 180.8
D 7 70 521011 2877.58 636 608 180.8
D 8 245 505517 2791.91 636 608 180.8

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