ASTROSAT CZTI

Data Quality Report

Orbit 54577

Creation date: 2025-10-30T10:28:46.960924
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_127T09_9000006520_54577cztM0_level2.fits modeM0/AS1A14_127T09_9000006520_54577cztM0_level2_quad_clean.evt
Size (bytes)587,419,200102,208,320
Size560.2 MB 97.5 MB
Events in quadrant A4,625,101692,023
Events in quadrant B4,206,568738,703
Events in quadrant C7,788,358531,254
Events in quadrant D4,547,040615,753

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0189602
B0180462
C0285069
D0190472

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C080
D080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74283654.913840%
B74283114.186861%
C7427178123.980073%
D74272973.998923%

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 8043 7429 258 258 3.21% 3.47%
B 8043 7429 140 140 1.74% 1.88%
C 8042 7428 1626 1626 20.22% 21.89%
D 8042 7428 204 204 2.54% 2.75%

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 11 3 936378 4753.11 789 772 196.8
A 0 8 231194 1170.6 789 772 196.8
A 14 235 124318 627.64 789 772 196.8
B 4 171 222338 1314.11 787 758 168.6
B 1 207 221677 1310.19 787 758 168.6
B 5 172 187899 1109.87 787 758 168.6
C 4 5 4027957 21034.78 684 677 191.5
C 13 3 751898 3923.68 684 677 191.5
C 15 230 115676 600.65 684 677 191.5
D 3 12 683783 3139.99 763 727 217.5
D 2 37 169680 776.67 763 727 217.5
D 1 3 143211 655.0 763 727 217.5

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