ASTROSAT CZTI

Data Quality Report

Orbit 55520

Creation date: 2026-01-02T11:42:34.133364
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_55520cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55520cztM0_level2_quad_clean.evt
Size (bytes)448,315,20097,951,680
Size427.5 MB 93.4 MB
Events in quadrant A3,054,838661,655
Events in quadrant B3,732,085680,761
Events in quadrant C3,218,607608,733
Events in quadrant D6,066,831545,849

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0139861
B0158561
C0147591
D0226001

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6720881.309524%
B67213344.969499%
C67211582.350841%
D67216429.552150%

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 7780 6721 0 0 0.00% 0.00%
B 7781 6722 213 213 2.74% 3.17%
C 7781 6722 67 67 0.86% 1.00%
D 7781 6722 564 564 7.25% 8.39%

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 62 89120 489.43 728 709 180.6
A 4 159 41165 223.96 728 709 180.6
A 7 243 26804 144.46 728 709 180.6
B 5 236 424508 2849.75 704 678 148.7
B 0 171 164615 1102.28 704 678 148.7
B 5 172 112460 751.6 704 678 148.7
C 13 3 348866 1838.61 690 682 189.4
C 12 252 87930 460.72 690 682 189.4
C 14 254 30425 157.06 690 682 189.4
D 7 70 812954 4226.14 683 653 192.2
D 2 31 617434 3208.92 683 653 192.2
D 8 160 603473 3136.28 683 653 192.2

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