ASTROSAT CZTI

Data Quality Report

Orbit 57174

Creation date: 2026-04-23T03:20:35.356785
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_070T08_9000006568_57174cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57174cztM0_level2_quad_clean.evt
Size (bytes)467,490,24085,970,880
Size445.8 MB 82.0 MB
Events in quadrant A3,435,241558,628
Events in quadrant B3,558,281614,418
Events in quadrant C4,817,213494,526
Events in quadrant D4,998,953491,025

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0148962
B0151692
C0189462
D0189984

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6375681.066667%
B63752403.764706%
C63754827.560784%
D63744006.275494%

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 7831 6657 54 54 0.69% 0.81%
B 7831 6657 154 154 1.97% 2.31%
C 7831 6657 379 379 4.84% 5.69%
D 7830 6656 433 433 5.53% 6.51%

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 713175 4140.45 683 666 172.1
A 10 251 18688 104.73 683 666 172.1
A 10 248 13983 77.39 683 666 172.1
B 10 16 541688 3810.57 666 640 142.0
B 2 249 188881 1325.77 666 640 142.0
B 0 213 51146 355.71 666 640 142.0
C 15 224 1947982 11195.31 634 629 173.9
C 9 38 143736 822.72 634 629 173.9
C 14 246 71048 404.84 634 629 173.9
D 7 96 999446 5463.61 637 606 182.8
D 5 113 475162 2595.8 637 606 182.8
D 12 33 407023 2223.08 637 606 182.8

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