ASTROSAT CZTI

Data Quality Report

Orbit 55340

Creation date: 2025-12-20T19:27:12.227386
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_009T01_9000006534_55340cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55340cztM0_level2_quad_clean.evt
Size (bytes)385,398,72093,430,080
Size367.5 MB 89.1 MB
Events in quadrant A3,463,018606,396
Events in quadrant B3,095,928642,673
Events in quadrant C3,343,686582,067
Events in quadrant D3,857,880544,831

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01364
B01364
C01362
D01364

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015205286
B014338298
C015072331
D016324297

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65021001.537988%
B64941271.955651%
C6493600.924072%
D64891251.926337%

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 7516 6540 40 40 0.53% 0.61%
B 7531 6536 18 18 0.24% 0.28%
C 7513 6534 39 39 0.52% 0.60%
D 7512 6523 90 90 1.20% 1.38%

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 12 115 544608 3213.2 685 668 169.3
A 0 8 89592 525.29 685 668 169.3
A 3 78 81291 476.26 685 668 169.3
B 5 185 210359 1455.37 670 645 144.1
B 0 199 71638 492.68 670 645 144.1
B 0 183 61991 425.73 670 645 144.1
C 12 252 395299 2152.04 662 655 183.4
C 9 38 159350 865.38 662 655 183.4
C 12 249 81438 440.52 662 655 183.4
D 11 129 694268 3703.08 662 632 187.3
D 2 62 242956 1293.68 662 632 187.3
D 3 12 95956 508.9 662 632 187.3

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