ASTROSAT CZTI

Data Quality Report

Orbit 55591

Creation date: 2026-01-06T16:09:21.540240
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_55591cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55591cztM0_level2_quad_clean.evt
Size (bytes)374,290,56085,158,720
Size357.0 MB 81.2 MB
Events in quadrant A3,586,324551,443
Events in quadrant B2,802,740603,219
Events in quadrant C4,014,341508,494
Events in quadrant D2,993,060504,076

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0149712
B0129171
C0162751
D0133521

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A58872604.416511%
B58881422.411685%
C58883886.589674%
D5888731.239810%

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 7007 5888 159 159 2.27% 2.70%
B 7008 5889 37 37 0.53% 0.63%
C 7008 5889 341 341 4.87% 5.79%
D 7008 5889 40 40 0.57% 0.68%

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 568374 3829.51 602 587 148.3
A 12 115 395384 2662.76 602 587 148.3
A 8 249 234557 1578.04 602 587 148.3
B 5 172 333013 2595.14 601 580 128.1
B 10 247 42262 325.39 601 580 128.1
B 9 251 15751 118.43 601 580 128.1
C 12 252 1073579 6876.44 571 566 156.0
C 6 223 424250 2715.19 571 566 156.0
C 9 38 88543 563.8 571 566 156.0
D 8 160 308704 1879.54 586 559 163.9
D 5 113 145174 882.08 586 559 163.9
D 2 172 75584 457.62 586 559 163.9

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