ASTROSAT CZTI

Data Quality Report

Orbit 55899

Creation date: 2026-01-27T09:38:05.295297
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_030T02_9000006544_55899cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55899cztM0_level2_quad_clean.evt
Size (bytes)389,085,12099,624,960
Size371.1 MB 95.0 MB
Events in quadrant A3,266,153642,078
Events in quadrant B3,215,788696,945
Events in quadrant C4,011,353603,524
Events in quadrant D3,364,529586,920

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0190
C0190
D0190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151532
B0150022
C0173542
D0153402

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6994921.315413%
B69941081.544181%
C69943224.603946%
D6994721.029454%

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 7829 6996 54 54 0.69% 0.77%
B 7829 6996 24 24 0.31% 0.34%
C 7829 6996 255 255 3.26% 3.64%
D 7829 6996 58 58 0.74% 0.83%

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 215877 1206.62 722 705 178.3
A 3 14 129142 720.24 722 705 178.3
A 0 8 55749 308.67 722 705 178.3
B 5 185 137478 884.73 720 692 154.6
B 0 213 86850 557.27 720 692 154.6
B 0 199 47098 300.15 720 692 154.6
C 15 199 589923 3097.49 697 691 190.2
C 12 252 416582 2186.26 697 691 190.2
C 6 223 203555 1066.42 697 691 190.2
D 2 31 251018 1257.15 701 667 199.1
D 8 160 137265 685.93 701 667 199.1
D 7 129 67195 334.07 701 667 199.1

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