ASTROSAT CZTI

Data Quality Report

Orbit 15456

Creation date: 2024-06-27T17:09:03.712291
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_077T01_9000002282_15456cztM0_level2.evt modeM0/AS1T02_077T01_9000002282_15456cztM0_level2_quad_clean.evt
Size (bytes)500,184,00091,019,520
Size477.0 MB 86.8 MB
Events in quadrant A3,732,022580,012
Events in quadrant B3,545,989588,698
Events in quadrant C3,371,460589,833
Events in quadrant D4,068,675555,818

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151293
B0144802
C0140722
D0161132

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63311862.937924%
B63311181.863845%
C6331751.184647%
D63311552.448270%

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 7542 6332 61 61 0.81% 0.96%
B 7542 6332 37 37 0.49% 0.58%
C 7542 6332 1 1 0.01% 0.02%
D 7542 6332 96 96 1.27% 1.52%

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 14 238 260697 1581.35 828 813 164.3
A 9 143 136827 827.62 828 813 164.3
A 14 237 96650 583.15 828 813 164.3
B 4 142 200076 1290.96 825 808 154.4
B 0 189 34069 215.48 825 808 154.4
B 0 229 22811 142.55 825 808 154.4
C 3 233 207416 1130.39 807 816 182.8
C 10 22 9960 50.03 807 816 182.8
C 13 61 5868 27.64 807 816 182.8
D 5 222 669577 3380.04 810 785 197.9
D 1 52 240580 1211.91 810 785 197.9
D 7 38 25063 122.7 810 785 197.9

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