ASTROSAT CZTI

Data Quality Report

Orbit 54816

Creation date: 2025-11-15T13:15:09.544489
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_039T06_9000006526_54816cztM0_level2.fits modeM0/AS1A14_039T06_9000006526_54816cztM0_level2_quad_clean.evt
Size (bytes)763,496,640118,730,880
Size728.1 MB 113.2 MB
Events in quadrant A3,817,725837,898
Events in quadrant B5,108,317851,335
Events in quadrant C5,905,032785,659
Events in quadrant D12,724,755488,431

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0187293
B0222785
C0240702
D0442905

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01860
B01860
C01860
D01860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9099710.780306%
B90985375.902396%
C91011832.010768%
D9100346438.065934%

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 10334 9099 7 7 0.07% 0.08%
B 10334 9098 317 317 3.07% 3.48%
C 10335 9100 135 135 1.31% 1.48%
D 10335 9099 3391 3391 32.81% 37.27%

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 13 254 18599 75.02 954 929 235.5
A 8 9 18527 74.72 954 929 235.5
A 12 15 14748 58.67 954 929 235.5
B 5 185 1246599 6180.42 926 894 201.6
B 10 247 78213 383.61 926 894 201.6
B 2 249 76983 377.51 926 894 201.6
C 4 5 1040313 4104.16 918 907 253.3
C 9 38 580865 2290.0 918 907 253.3
C 12 252 286932 1129.39 918 907 253.3
D 15 94 8832358 42105.49 725 692 209.8
D 11 176 326148 1551.63 725 692 209.8
D 3 12 278254 1323.29 725 692 209.8

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