ASTROSAT CZTI

Data Quality Report

Orbit 51598

Creation date: 2025-04-12T20:36:45.358811
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_51598cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51598cztM0_level2_quad_clean.evt
Size (bytes)545,745,600100,186,560
Size520.5 MB 95.5 MB
Events in quadrant A5,449,226644,669
Events in quadrant B3,987,914709,742
Events in quadrant C4,855,926615,854
Events in quadrant D5,379,603587,985

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0208122
B0163592
C0191232
D0205392

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68233745.481460%
B68232583.781328%
C68234546.653965%
D68233294.821926%

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 7798 6823 137 137 1.76% 2.01%
B 7798 6823 65 65 0.83% 0.95%
C 7798 6823 245 245 3.14% 3.59%
D 7798 6824 219 219 2.81% 3.21%

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 1002426 5403.88 763 744 185.4
A 8 10 499032 2688.16 763 744 185.4
A 12 250 280764 1510.65 763 744 185.4
B 8 128 160792 982.35 760 733 162.9
B 5 185 136644 834.14 760 733 162.9
B 10 44 111824 681.81 760 733 162.9
C 15 198 725091 3610.43 732 725 200.6
C 3 233 560018 2787.66 732 725 200.6
C 13 3 341044 1696.24 732 725 200.6
D 2 163 967281 4715.93 738 712 205.0
D 8 176 402986 1962.71 738 712 205.0
D 3 12 249599 1214.33 738 712 205.0

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