ASTROSAT CZTI

Data Quality Report

Orbit 56841

Creation date: 2026-03-31T18:02:21.081211
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_083T03_9000006562_56841cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56841cztM0_level2_quad_clean.evt
Size (bytes)483,292,80088,784,640
Size460.9 MB 84.7 MB
Events in quadrant A3,771,339598,953
Events in quadrant B3,499,874638,870
Events in quadrant C5,551,608501,555
Events in quadrant D4,591,064521,813

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154891
B0145841
C0208021
D0178451

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61202654.330065%
B61202704.411765%
C612195615.618363%
D61215128.364646%

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 7260 6121 195 195 2.69% 3.19%
B 7260 6121 153 153 2.11% 2.50%
C 7261 6122 897 897 12.35% 14.65%
D 7261 6122 367 367 5.05% 5.99%

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 14 949930 5730.9 672 655 165.6
A 3 62 143258 860.91 672 655 165.6
A 10 251 25186 148.1 672 655 165.6
B 5 185 481851 3431.62 650 628 140.2
B 10 16 161538 1147.46 650 628 140.2
B 0 245 57533 405.79 650 628 140.2
C 12 249 2271806 14246.22 580 573 159.4
C 12 252 692683 4341.23 580 573 159.4
C 6 223 198134 1239.19 580 573 159.4
D 8 240 1462843 8185.3 634 605 178.6
D 2 249 388638 2172.13 634 605 178.6
D 11 224 68956 382.61 634 605 178.6

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