ASTROSAT CZTI

Data Quality Report

Orbit 50872

Creation date: 2025-02-22T22:54:18.526076
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/AS1C07_001T01_9000006450_50872cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50872cztM0_level2_quad_clean.evt
Size (bytes)522,570,24085,230,720
Size498.4 MB 81.3 MB
Events in quadrant A4,404,407561,473
Events in quadrant B3,590,265624,180
Events in quadrant C5,048,399491,153
Events in quadrant D5,831,530481,994

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0169631
B0149114
C0190211
D0215111

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60444126.816678%
B60432534.186662%
C604481913.550629%
D604471411.813369%

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 7098 6044 262 262 3.69% 4.33%
B 7097 6043 87 87 1.23% 1.44%
C 7098 6044 582 582 8.20% 9.63%
D 7098 6044 639 639 9.00% 10.57%

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 4 249 569201 3598.34 640 623 158.0
A 4 4 450214 2845.31 640 623 158.0
A 7 206 175405 1106.14 640 623 158.0
B 4 206 337686 2497.68 643 622 135.0
B 4 81 276673 2045.57 643 622 135.0
B 10 247 98621 726.18 643 622 135.0
C 1 29 1022469 6348.62 592 587 161.0
C 12 247 446952 2773.12 592 587 161.0
C 15 229 253408 1570.69 592 587 161.0
D 2 216 870333 5211.26 608 586 166.9
D 15 108 448358 2682.91 608 586 166.9
D 2 249 422422 2527.51 608 586 166.9

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