ASTROSAT CZTI

Data Quality Report

Orbit 57237

Creation date: 2026-04-30T16:34:10.536959
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_070T08_9000006568_57237cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57237cztM0_level2_quad_clean.evt
Size (bytes)569,629,440102,922,560
Size543.2 MB 98.2 MB
Events in quadrant A5,600,494652,028
Events in quadrant B4,130,484715,488
Events in quadrant C6,294,871588,137
Events in quadrant D4,399,723569,675

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01760
B01760
C01760
D01760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0229983
B0185914
C0247933
D0194273

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A84975716.720019%
B84973213.777804%
C84978159.591621%
D84972222.612687%

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 9751 8785 266 266 2.73% 3.03%
B 9751 8784 30 30 0.31% 0.34%
C 9751 8783 506 506 5.19% 5.76%
D 9751 8785 111 111 1.14% 1.26%

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 1958144 8895.79 901 878 220.0
A 4 13 74896 336.41 901 878 220.0
A 4 236 16435 70.71 901 878 220.0
B 10 16 134609 696.48 903 869 192.0
B 0 213 75009 386.1 903 869 192.0
B 10 247 70308 361.62 903 869 192.0
C 15 224 1252287 5393.41 860 850 232.0
C 12 254 1139738 4908.35 860 850 232.0
C 12 252 159815 685.1 860 850 232.0
D 9 1 239233 973.96 883 843 244.8
D 3 12 147217 598.02 883 843 244.8
D 8 240 123636 501.68 883 843 244.8

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