ASTROSAT CZTI

Data Quality Report

Orbit 55735

Creation date: 2026-01-16T16:51:52.841629
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_099T04_9000006540_55735cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55735cztM0_level2_quad_clean.evt
Size (bytes)724,613,76084,781,440
Size691.0 MB 80.9 MB
Events in quadrant A7,463,571506,680
Events in quadrant B5,975,666573,097
Events in quadrant C6,823,157518,619
Events in quadrant D6,062,032518,893

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0264511
B0222291
C0246561
D0225601

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6442143922.337783%
B6442111817.354859%
C6442111317.277243%
D644373111.345646%

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 7587 6443 1387 1387 18.28% 21.53%
B 7587 6443 971 971 12.80% 15.07%
C 7587 6443 973 973 12.82% 15.10%
D 7588 6444 623 623 8.21% 9.67%

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 12 115 2926367 18575.06 636 618 157.5
A 7 64 734307 4658.06 636 618 157.5
A 15 32 708718 4495.6 636 618 157.5
B 4 206 3264017 23748.16 644 622 137.4
B 0 182 75400 544.17 644 622 137.4
B 0 199 49271 354.03 644 622 137.4
C 15 199 2975727 17085.86 633 627 174.1
C 9 38 1015124 5826.21 633 627 174.1
C 14 96 143072 818.06 633 627 174.1
D 11 129 2772913 15100.48 640 609 183.6
D 6 239 583803 3176.6 640 609 183.6
D 10 181 63280 341.36 640 609 183.6

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