ASTROSAT CZTI

Data Quality Report

Orbit 10902

Creation date: 2024-06-27T16:05:26.264828
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/AS1A04_055T02_9000001576_10902cztM0_level2.evt modeM0/AS1A04_055T02_9000001576_10902cztM0_level2_quad_clean.evt
Size (bytes)602,858,88087,160,320
Size574.9 MB 83.1 MB
Events in quadrant A4,778,955549,202
Events in quadrant B4,961,110549,460
Events in quadrant C2,960,408564,966
Events in quadrant D5,104,464509,599

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0187942
B0191551
C0136523
D0197961

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66863965.922824%
B66865307.927012%
C6685140.209424%
D66866229.303021%

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 7221 6687 270 270 3.74% 4.04%
B 7221 6687 321 321 4.45% 4.80%
C 7221 6687 1 1 0.01% 0.01%
D 7221 6686 534 534 7.40% 7.99%

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 8 5 1258443 7971.18 768 752 157.8
A 13 251 478340 3026.93 768 752 157.8
A 15 223 32936 203.98 768 752 157.8
B 4 239 1752328 11946.37 767 750 146.6
B 10 245 65195 439.54 767 750 146.6
B 11 51 41596 278.58 767 750 146.6
C 14 234 5904 29.17 757 760 176.3
C 13 61 5824 28.72 757 760 176.3
C 8 222 3918 17.91 757 760 176.3
D 1 52 1407383 8073.11 719 698 174.2
D 10 199 630152 3612.5 719 698 174.2
D 7 71 176555 1009.26 719 698 174.2

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