ASTROSAT CZTI

Data Quality Report

Orbit 55493

Creation date: 2025-12-31T01:36:03.780480
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_099T01_9000006536_55493cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55493cztM0_level2_quad_clean.evt
Size (bytes)760,723,20096,114,240
Size725.5 MB 91.7 MB
Events in quadrant A4,921,471682,006
Events in quadrant B4,902,347703,686
Events in quadrant C7,164,989601,647
Events in quadrant D10,596,549406,804

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01500
C01500
D01500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0198413
B0198544
C0265613
D0366193

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74103785.101215%
B74095877.922797%
C740999513.429613%
D7409287738.831151%

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 7740 7413 301 301 3.89% 4.06%
B 7739 7412 322 322 4.16% 4.34%
C 7739 7412 843 843 10.89% 11.37%
D 7739 7412 2339 2339 30.22% 31.56%

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 78 822767 4172.28 794 773 197.0
A 0 8 336720 1705.2 794 773 197.0
A 15 32 304630 1542.32 794 773 197.0
B 5 172 1512172 9224.43 769 740 163.9
B 0 171 116423 706.03 769 740 163.9
B 10 247 97221 588.83 769 740 163.9
C 9 38 3036386 14732.59 757 748 206.0
C 6 9 541031 2622.11 757 748 206.0
C 13 3 423195 2050.22 757 748 206.0
D 7 70 3920032 22224.02 621 593 176.4
D 11 129 3357986 19037.1 621 593 176.4
D 6 239 185192 1046.71 621 593 176.4

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