ASTROSAT CZTI

Data Quality Report

Orbit 59251

Creation date: 2026-09-09T20:31:29.042975
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/AS1T05_271T01_9000006604_59251cztM0_level2.fits modeM0/AS1T05_271T01_9000006604_59251cztM0_level2_quad_clean.evt
Size (bytes)611,464,32093,700,800
Size583.1 MB 89.4 MB
Events in quadrant A3,312,367663,425
Events in quadrant B3,496,466705,550
Events in quadrant C3,395,716628,344
Events in quadrant D11,909,576372,744

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144502
B0150524
C0146792
D0400672

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66981211.806509%
B66972053.061072%
C6697901.343885%
D6697303345.288935%

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 7703 6699 25 25 0.32% 0.37%
B 7702 6698 72 72 0.93% 1.07%
C 7702 6698 17 17 0.22% 0.25%
D 7702 6698 3111 3111 40.39% 46.45%

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 7 78 111172 591.11 763 744 186.8
A 3 245 107638 572.19 763 744 186.8
A 10 251 71041 376.29 763 744 186.8
B 4 201 136164 841.27 746 716 161.0
B 4 236 120434 743.57 746 716 161.0
B 7 252 116328 718.07 746 716 161.0
C 6 13 253893 1243.09 742 737 203.6
C 12 252 136053 664.45 742 737 203.6
C 14 254 46333 223.89 742 737 203.6
D 12 110 8841744 47173.68 656 624 187.4
D 12 2 154011 818.43 656 624 187.4
D 13 138 112314 595.95 656 624 187.4

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

TCT plots

Parameter TCT0 TCT_healed
Tct