ASTROSAT CZTI

Data Quality Report

Orbit 51750

Creation date: 2025-04-23T03:14:58.908015
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/AS1A13_090T01_9000006464_51750cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51750cztM0_level2_quad_clean.evt
Size (bytes)1,554,287,040219,392,640
Size1.4 GB 209.2 MB
Events in quadrant A10,170,5761,506,017
Events in quadrant B14,026,0631,512,651
Events in quadrant C9,819,0271,460,296
Events in quadrant D22,237,5271,018,264

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03340
B03340
C03340
D03340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0413371
B0530861
C0408561
D0775041

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A165975303.193348%
B16597190911.502079%
C165973001.807556%
D16598462627.870828%

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 16832 16598 331 331 1.97% 1.99%
B 16832 16598 1194 1194 7.09% 7.19%
C 16832 16598 214 214 1.27% 1.29%
D 16833 16599 4067 4067 24.16% 24.50%

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 2 143 463830 1062.34 1780 1740 435.0
A 4 3 281952 644.2 1780 1740 435.0
A 3 14 269857 616.4 1780 1740 435.0
B 4 206 4602462 12529.41 1711 1648 367.2
B 8 128 409684 1111.21 1711 1648 367.2
B 1 207 397078 1076.88 1711 1648 367.2
C 3 233 478644 998.14 1748 1738 477.8
C 13 3 408326 850.97 1748 1738 477.8
C 15 218 391734 816.25 1748 1738 477.8
D 11 129 10785552 25166.02 1536 1483 428.5
D 8 176 1923357 4484.94 1536 1483 428.5
D 7 60 1257986 2932.21 1536 1483 428.5

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