ASTROSAT CZTI

Data Quality Report

Orbit 57355

Creation date: 2026-05-05T09:51:15.481612
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_102T01_9000006572_57355cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57355cztM0_level2_quad_clean.evt
Size (bytes)2,185,902,720436,250,880
Size2.0 GB 416.0 MB
Events in quadrant A14,850,1672,954,931
Events in quadrant B15,048,8553,132,283
Events in quadrant C23,788,4912,580,517
Events in quadrant D24,852,7542,429,171

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0671685
B0670725
C0927845
D0953875

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0370
B0370
C0370
D0370

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06240
B06240
C06240
D06220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A307162070.673916%
B307175021.634274%
C3071826288.555244%
D3071729469.590780%

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 38124 30999 92 92 0.24% 0.30%
B 38125 31000 185 185 0.49% 0.60%
C 38125 31001 2122 2122 5.57% 6.84%
D 38124 31000 2646 2646 6.94% 8.54%

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 3 14 907188 1106.24 3318 3236 817.1
A 12 3 422156 512.67 3318 3236 817.1
A 4 95 133768 159.74 3318 3236 817.1
B 5 185 991529 1414.66 3280 3155 698.7
B 7 252 273053 386.3 3280 3155 698.7
B 1 223 154559 216.7 3280 3155 698.7
C 15 224 9409859 11302.75 3072 3033 832.3
C 12 252 911025 1091.0 3072 3033 832.3
C 14 254 406681 485.0 3072 3033 832.3
D 8 240 6242892 7272.35 3060 2912 858.0
D 2 249 4652154 5418.44 3060 2912 858.0
D 7 96 701471 814.13 3060 2912 858.0

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