ASTROSAT CZTI

Data Quality Report

Orbit 56421

Creation date: 2026-03-03T11:59:14.194346
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_083T05_9000006554_56421cztM0_level2.fits modeM0/AS1A14_083T05_9000006554_56421cztM0_level2_quad_clean.evt
Size (bytes)711,740,16072,218,880
Size678.8 MB 68.9 MB
Events in quadrant A10,787,591305,912
Events in quadrant B4,837,398539,229
Events in quadrant C4,921,887468,486
Events in quadrant D5,323,922443,648

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0362361
B0186361
C0188843
D0200441

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6141302549.259078%
B614167310.959127%
C614165810.714867%
D61414567.425501%

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 7447 6232 2733 2733 36.70% 43.85%
B 7448 6425 310 310 4.16% 4.82%
C 7448 6419 491 491 6.59% 7.65%
D 7448 6425 348 348 4.67% 5.42%

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 4015096 29963.91 537 524 134.0
A 4 95 3208058 23940.35 537 524 134.0
A 3 62 581745 4338.11 537 524 134.0
B 4 206 1924550 13819.99 651 628 139.2
B 15 33 95880 684.22 651 628 139.2
B 10 247 72152 513.77 651 628 139.2
C 15 147 1246427 7161.26 638 634 174.0
C 12 254 441860 2536.32 638 634 174.0
C 15 230 441070 2531.78 638 634 174.0
D 8 129 1347786 7540.2 637 609 178.7
D 5 113 746095 4172.51 637 609 178.7
D 2 249 211689 1181.42 637 609 178.7

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