ASTROSAT CZTI

Data Quality Report

Orbit 20180119_T01_218T01_9000001852_level2

Creation date: 2025-11-19T06:49:50.178072
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/AS1T01_218T01_9000001852cztM0_level2.fits modeM0/AS1T01_218T01_9000001852cztM0_level2_quad_clean.evt
Size (bytes)694,788,480678,801,600
Size662.6 MB 647.4 MB
Events in quadrant A4,192,5024,038,230
Events in quadrant B4,080,4404,054,695
Events in quadrant C4,172,5363,883,900
Events in quadrant D3,546,7763,532,646

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01578840
B01663260
C01518580
D01813870

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015020
B015020
C015020
D015020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01170
B01170
C01170
D01170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7361010911.482136%
B7361019782.687135%
C736107060.959109%
D7361022373.038989%

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 85505 73608 0 0 0.00% 0.00%
B 85505 73608 0 0 0.00% 0.00%
C 85505 73606 0 0 0.00% 0.00%
D 85505 73599 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 4023 10.82 1092 1019 277.5
A 7 110 3361 8.44 1092 1019 277.5
A 0 30 3141 7.65 1092 1019 277.5
B 2 9 3465 11.4 1075 1023 214.1
B 12 226 2750 8.06 1075 1023 214.1
B 3 17 2731 7.98 1075 1023 214.1
C 1 81 3103 7.34 1101 1022 283.5
C 1 80 3067 7.21 1101 1022 283.5
C 12 241 3002 6.98 1101 1022 283.5
D 7 5 2561 6.07 1013 918 270.8
D 7 3 2550 6.03 1013 918 270.8
D 6 231 2504 5.86 1013 918 270.8

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