ASTROSAT CZTI

Data Quality Report

Orbit 20180723_T02_072T01_9000002250_level2

Creation date: 2025-11-23T16:55:22.071770
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/AS1T02_072T01_9000002250cztM0_level2.fits modeM0/AS1T02_072T01_9000002250cztM0_level2_quad_clean.evt
Size (bytes)485,841,600632,401,920
Size463.3 MB 603.1 MB
Events in quadrant A2,966,7004,102,083
Events in quadrant B2,848,3624,098,428
Events in quadrant C2,854,9603,800,001
Events in quadrant D2,536,7943,648,131

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0810
B0810
C0810
D0810

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010420
B010420
C010420
D010420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01084140
B01167070
C01361680
D01154620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A510834520.884834%
B5108312362.419592%
C5108327725.426463%
D510836631.297888%

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 59263 51057 0 0 0.00% 0.00%
B 59263 51057 0 0 0.00% 0.00%
C 59263 51031 0 0 0.00% 0.00%
D 59263 51059 0 0 0.00% 0.00%

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 0 29 2912 11.39 773 729 191.7
A 7 110 2389 8.66 773 729 191.7
A 0 30 2235 7.86 773 729 191.7
B 2 9 2441 12.08 752 721 142.3
B 2 8 1956 8.68 752 721 142.3
B 14 254 1922 8.44 752 721 142.3
C 1 81 2223 7.89 752 705 192.4
C 1 80 2185 7.69 752 705 192.4
C 12 241 1997 6.71 752 705 192.4
D 3 14 1843 6.11 723 658 194.1
D 10 189 1816 5.97 723 658 194.1
D 6 67 1784 5.8 723 658 194.1

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