ASTROSAT CZTI

Data Quality Report

Orbit 55763

Creation date: 2026-01-18T05:30:49.433737
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_55763cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55763cztM0_level2_quad_clean.evt
Size (bytes)813,634,56074,471,040
Size775.9 MB 71.0 MB
Events in quadrant A11,141,495352,014
Events in quadrant B2,691,402643,115
Events in quadrant C3,292,899578,097
Events in quadrant D12,503,662241,274

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0374661
B0129421
C0139611
D0415051

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6313290245.968636%
B6313250.396008%
C6313380.601933%
D6313375559.480437%

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 7378 6313 2690 2690 36.46% 42.61%
B 7378 6314 6 6 0.08% 0.10%
C 7378 6313 27 27 0.37% 0.43%
D 7378 6313 3722 3722 50.45% 58.96%

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 15 32 8071562 63182.28 511 497 127.7
A 12 115 388591 3038.1 511 497 127.7
A 3 14 369357 2887.53 511 497 127.7
B 10 247 44465 310.38 654 628 141.2
B 7 252 20600 141.4 654 628 141.2
B 12 111 17138 116.89 654 628 141.2
C 1 16 501988 2813.32 646 640 178.2
C 12 250 91062 507.4 646 640 178.2
C 6 223 76233 424.19 646 640 178.2
D 11 129 10271056 78672.5 455 435 130.5
D 7 70 248816 1902.59 455 435 130.5
D 7 129 40174 304.4 455 435 130.5

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