ASTROSAT CZTI

Data Quality Report

Orbit 55621

Creation date: 2026-01-09T19:59:06.186732
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_55621cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55621cztM0_level2_quad_clean.evt
Size (bytes)440,170,56092,831,040
Size419.8 MB 88.5 MB
Events in quadrant A3,687,374613,536
Events in quadrant B2,744,885667,808
Events in quadrant C4,155,353564,997
Events in quadrant D5,204,117514,859

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0153671
B0132191
C0173023
D0200151

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64511912.960781%
B64521031.596404%
C64513635.627035%
D64515728.866842%

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 7531 6452 121 121 1.61% 1.88%
B 7532 6453 16 16 0.21% 0.25%
C 7531 6453 336 336 4.46% 5.21%
D 7530 6451 544 544 7.22% 8.43%

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 312849 1889.21 672 655 165.3
A 0 8 258501 1560.33 672 655 165.3
A 8 249 175706 1059.3 672 655 165.3
B 5 185 32591 223.78 667 642 142.8
B 10 247 31648 217.17 667 642 142.8
B 12 111 17047 114.9 667 642 142.8
C 12 2 721685 4114.53 636 630 175.2
C 13 3 555758 3167.7 636 630 175.2
C 9 38 94519 535.76 636 630 175.2
D 8 160 1746475 9864.36 627 600 177.0
D 11 129 501301 2829.01 627 600 177.0
D 12 191 144157 811.11 627 600 177.0

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