ASTROSAT CZTI

Data Quality Report

Orbit 56757

Creation date: 2026-03-26T04:44:05.827815
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_9000006560_56757cztM0_level2.fits modeM0/AS1A14_083T05_9000006560_56757cztM0_level2_quad_clean.evt
Size (bytes)567,803,52091,650,240
Size541.5 MB 87.4 MB
Events in quadrant A4,290,590609,050
Events in quadrant B6,852,104584,221
Events in quadrant C4,666,781575,353
Events in quadrant D4,685,826536,599

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0174981
B0250541
C0189511
D0189381

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67353445.107647%
B6734119617.760618%
C67353835.686711%
D67354967.364514%

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 7295 6736 295 295 4.04% 4.38%
B 7294 6735 658 658 9.02% 9.77%
C 7295 6736 364 364 4.99% 5.40%
D 7295 6736 500 500 6.85% 7.42%

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 3 62 1045157 6096.09 684 668 171.3
A 3 14 317703 1850.35 684 668 171.3
A 10 251 161881 940.91 684 668 171.3
B 4 206 2995342 21537.12 648 624 139.0
B 5 185 602116 4325.75 648 624 139.0
B 8 128 286134 2053.3 648 624 139.0
C 15 230 1525674 8425.47 658 651 181.0
C 12 252 265734 1464.53 658 651 181.0
C 13 3 76052 416.58 658 651 181.0
D 2 249 1726671 9202.06 656 625 187.6
D 2 252 193918 1030.5 656 625 187.6
D 2 236 65632 346.57 656 625 187.6

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