ASTROSAT CZTI

Data Quality Report

Orbit 51739

Creation date: 2025-04-22T09:11:59.140260
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_090T01_9000006464_51739cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51739cztM0_level2_quad_clean.evt
Size (bytes)730,232,640103,008,960
Size696.4 MB 98.2 MB
Events in quadrant A5,848,518690,658
Events in quadrant B4,292,213755,816
Events in quadrant C6,596,318659,313
Events in quadrant D9,729,718504,801

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0223992
B0176822
C0246802
D0339893

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A73012112.890015%
B73021912.615722%
C73022773.793481%
D7301179024.517189%

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 9136 7302 138 138 1.51% 1.89%
B 9137 7304 109 109 1.19% 1.49%
C 9137 7303 245 245 2.68% 3.35%
D 9136 7301 1839 1839 20.13% 25.19%

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 1461181 7612.07 780 764 191.9
A 13 248 341534 1776.18 780 764 191.9
A 12 3 142595 739.26 780 764 191.9
B 10 254 312539 1850.29 781 753 168.5
B 4 174 174042 1028.38 781 753 168.5
B 4 206 125140 738.17 781 753 168.5
C 3 242 2395574 11451.1 762 756 209.1
C 9 38 250417 1193.78 762 756 209.1
C 13 3 223465 1064.91 762 756 209.1
D 11 129 5075098 26303.24 680 655 192.9
D 8 176 1462650 7578.21 680 655 192.9
D 2 120 115327 594.4 680 655 192.9

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