ASTROSAT CZTI

Data Quality Report

Orbit 51701

Creation date: 2025-04-22T12:01:15.811296
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_031T01_9000006462_51701cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51701cztM0_level2_quad_clean.evt
Size (bytes)600,194,88097,145,280
Size572.4 MB 92.6 MB
Events in quadrant A5,602,930647,520
Events in quadrant B4,049,050708,949
Events in quadrant C8,377,510497,000
Events in quadrant D3,638,946595,207

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0213641
B0168102
C0297791
D0158201

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70733254.594938%
B70732223.138696%
C7073189926.848579%
D70731612.276262%

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 7633 7074 116 116 1.52% 1.64%
B 7633 7074 15 15 0.20% 0.21%
C 7633 7074 1321 1321 17.31% 18.67%
D 7633 7074 28 28 0.37% 0.40%

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 12 3 834778 4461.47 771 755 186.9
A 3 14 609292 3255.27 771 755 186.9
A 9 191 562526 3005.1 771 755 186.9
B 10 254 218131 1322.66 764 735 164.4
B 0 213 190246 1153.0 764 735 164.4
B 10 44 180209 1091.94 764 735 164.4
C 15 231 2355443 13172.92 657 649 178.8
C 12 254 1375216 7689.44 657 649 178.8
C 0 192 997495 5576.44 657 649 178.8
D 3 12 246110 1172.57 753 725 209.3
D 5 173 63298 299.0 753 725 209.3
D 8 176 49878 234.87 753 725 209.3

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