ASTROSAT CZTI

Data Quality Report

Orbit 55548

Creation date: 2026-01-03T18:21:37.992394
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_021T06_9000006538_55548cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55548cztM0_level2_quad_clean.evt
Size (bytes)398,160,00087,287,040
Size379.7 MB 83.2 MB
Events in quadrant A2,802,078587,091
Events in quadrant B3,002,411630,732
Events in quadrant C2,991,269546,864
Events in quadrant D5,473,978458,212

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01290349
B01339332
C01347465
D020930410

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01222
B01220
C01220
D01220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60281071.775050%
B60361091.805832%
C6022981.627366%
D598886514.445558%

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 7151 6050 31 31 0.43% 0.51%
B 7151 6049 19 19 0.27% 0.31%
C 7151 6049 53 53 0.74% 0.88%
D 7151 6015 827 827 11.56% 13.75%

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 0 8 160891 1009.23 637 621 158.8
A 15 32 82110 513.14 637 621 158.8
A 4 239 28568 175.98 637 621 158.8
B 4 206 444698 3292.06 625 601 134.9
B 10 247 27544 199.73 625 601 134.9
B 7 252 23264 168.0 625 601 134.9
C 9 38 209741 1258.95 606 598 166.1
C 13 3 147414 883.77 606 598 166.1
C 1 16 127921 766.43 606 598 166.1
D 11 129 2775721 16916.93 576 550 164.0
D 8 160 178678 1085.84 576 550 164.0
D 2 172 74819 452.73 576 550 164.0

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