ASTROSAT CZTI

Data Quality Report

Orbit 51449

Creation date: 2025-04-02T19:29:58.979429
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_9000006458_51449cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51449cztM0_level2_quad_clean.evt
Size (bytes)825,649,92081,679,680
Size787.4 MB 77.9 MB
Events in quadrant A9,963,992441,977
Events in quadrant B5,847,472593,445
Events in quadrant C10,159,884417,153
Events in quadrant D4,077,864556,818

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0341831
B0220501
C0347431
D0168661

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6642227034.176453%
B6643103215.535150%
C6642247037.187594%
D66422273.417645%

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 7612 6642 2154 2154 28.30% 32.43%
B 7613 6643 758 758 9.96% 11.41%
C 7612 6642 2404 2404 31.58% 36.19%
D 7612 6642 191 191 2.51% 2.88%

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 3432106 22492.91 619 605 152.6
A 12 3 1785765 11701.42 619 605 152.6
A 4 249 979672 6417.62 619 605 152.6
B 5 185 2111780 14576.16 671 647 144.8
B 6 51 223159 1536.31 671 647 144.8
B 4 206 168626 1159.8 671 647 144.8
C 4 12 4961851 31474.34 577 571 157.6
C 3 233 983871 6238.05 577 571 157.6
C 15 179 945797 5996.51 577 571 157.6
D 6 42 813734 4245.95 693 668 191.5
D 8 176 209050 1088.2 693 668 191.5
D 13 170 61598 318.19 693 668 191.5

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