ASTROSAT CZTI

Data Quality Report

Orbit 55418

Creation date: 2025-12-26T00:46:39.063865
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_099T01_9000006536_55418cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55418cztM0_level2_quad_clean.evt
Size (bytes)633,971,52082,540,800
Size604.6 MB 78.7 MB
Events in quadrant A2,764,275631,240
Events in quadrant B3,973,538601,654
Events in quadrant C4,702,052541,492
Events in quadrant D11,537,063284,466

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130111
B0166601
C0186021
D0386161

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6310590.935024%
B631163510.061797%
C631164510.220250%
D6311343254.381239%

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 7430 6311 13 13 0.17% 0.21%
B 7431 6312 531 531 7.15% 8.41%
C 7431 6312 507 507 6.82% 8.03%
D 7431 6311 2927 2927 39.39% 46.38%

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 0 8 72603 426.21 675 656 168.8
A 13 254 20267 116.17 675 656 168.8
A 4 3 15944 90.56 675 656 168.8
B 5 172 1362245 10285.53 628 606 132.4
B 5 185 50928 380.12 628 606 132.4
B 10 247 21564 158.31 628 606 132.4
C 12 252 2011400 11641.72 630 623 172.7
C 13 3 124922 719.65 630 623 172.7
C 10 64 34657 197.05 630 623 172.7
D 11 129 9205402 68461.68 476 454 134.5
D 2 249 150207 1113.78 476 454 134.5
D 11 176 96278 712.69 476 454 134.5

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