ASTROSAT CZTI

Data Quality Report

Orbit 51582

Creation date: 2025-04-11T18:48:56.215714
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/AS1A13_037T05_9000006460_51582cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51582cztM0_level2_quad_clean.evt
Size (bytes)719,383,68075,139,200
Size686.1 MB 71.7 MB
Events in quadrant A7,460,937593,611
Events in quadrant B3,764,051687,160
Events in quadrant C9,399,8417,330
Events in quadrant D5,502,480537,897

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0265621
B0154631
C0324224
D0206811

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A643472111.206093%
B64351983.076923%
C6434638499.222878%
D64345839.061237%

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 7524 6434 427 427 5.68% 6.64%
B 7525 6436 57 57 0.76% 0.89%
C 7523 6433 1477 1477 19.63% 22.96%
D 7524 6435 500 500 6.65% 7.77%

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 12 3 2701206 15532.58 707 689 173.9
A 12 250 1013189 5823.6 707 689 173.9
A 12 194 322859 1853.03 707 689 173.9
B 5 185 212149 1377.53 717 692 153.5
B 4 174 195741 1270.64 717 692 153.5
B 0 171 146080 947.13 717 692 153.5
C 15 198 7714195 274038.25 93 92 28.1
C 15 246 228131 8100.93 93 92 28.1
C 15 215 186251 6613.17 93 92 28.1
D 3 12 1028625 5384.87 681 656 190.9
D 8 176 894012 4679.72 681 656 190.9
D 10 172 329848 1724.43 681 656 190.9

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