ASTROSAT CZTI

Data Quality Report

Orbit 55408

Creation date: 2025-12-26T12:15:38.836315
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_55408cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55408cztM0_level2_quad_clean.evt
Size (bytes)1,401,713,280178,110,720
Size1.3 GB 169.9 MB
Events in quadrant A7,952,8461,304,600
Events in quadrant B6,773,7481,411,552
Events in quadrant C6,790,3961,261,720
Events in quadrant D29,258,484424,264

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02880
B02900
C02900
D02900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0344979
B0311904
C0313274
D09682325

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A143423932.740204%
B143451931.345417%
C143451310.913210%
D14344949566.194925%

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 14447 14346 301 301 2.08% 2.10%
B 14447 14347 86 86 0.60% 0.60%
C 14447 14347 84 84 0.58% 0.59%
D 14447 14347 8898 8898 61.59% 62.02%

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 4 159 1612579 4434.73 1475 1438 363.3
A 0 8 316757 867.93 1475 1438 363.3
A 4 3 80710 218.2 1475 1438 363.3
B 5 172 381319 1223.49 1467 1409 310.5
B 10 247 168297 537.46 1467 1409 310.5
B 7 0 154770 493.9 1467 1409 310.5
C 13 3 591797 1487.75 1456 1440 396.8
C 1 241 295596 741.3 1456 1440 396.8
C 12 252 42117 102.51 1456 1440 396.8
D 11 129 24705251 109044.12 794 759 226.6
D 11 176 372926 1642.72 794 759 226.6
D 2 249 234178 1030.3 794 759 226.6

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