ASTROSAT CZTI

Data Quality Report

Orbit 55651

Creation date: 2026-01-21T21:10:35.602791
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_021T06_9000006538_55651cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55651cztM0_level2_quad_clean.evt
Size (bytes)473,592,96092,292,480
Size451.7 MB 88.0 MB
Events in quadrant A4,351,456622,582
Events in quadrant B2,798,455684,311
Events in quadrant C2,974,850599,348
Events in quadrant D6,883,974420,441

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0175872
B0136822
C0142572
D0254843

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67042043.042959%
B6705831.237882%
C6705530.790455%
D6704180326.894391%

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 7679 6705 114 114 1.48% 1.70%
B 7680 6706 1 1 0.01% 0.01%
C 7680 6706 24 24 0.31% 0.36%
D 7679 6705 1697 1697 22.10% 25.31%

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 14 1104061 6446.16 691 673 171.2
A 12 115 197835 1151.85 691 673 171.2
A 15 32 184642 1074.78 691 673 171.2
B 0 171 33333 225.58 683 659 144.8
B 12 111 17488 116.19 683 659 144.8
B 11 111 16304 108.01 683 659 144.8
C 13 3 134027 735.14 664 656 181.4
C 6 223 78601 429.63 664 656 181.4
C 12 250 47142 256.23 664 656 181.4
D 7 70 4036967 24273.57 594 567 166.3
D 11 129 159595 956.34 594 567 166.3
D 2 249 64238 382.9 594 567 166.3

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