ASTROSAT CZTI

Data Quality Report

Orbit 20170215_T01_156T01_9000001034_level2

Creation date: 2025-11-09T15:51:28.081716
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_156T01_9000001034cztM0_level2.fits modeM0/AS1T01_156T01_9000001034cztM0_level2_quad_clean.evt
Size (bytes)761,581,440755,665,920
Size726.3 MB 720.7 MB
Events in quadrant A4,621,7884,542,485
Events in quadrant B4,457,0824,563,642
Events in quadrant C4,549,0664,368,566
Events in quadrant D3,914,3983,889,502

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016400
B016400
C016400
D016400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01662930
B01741140
C01668720
D01891360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A805497610.944767%
B805499721.206719%
C805495880.729990%
D8054822142.748672%

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 102369 80545 0 0 0.00% 0.00%
B 102369 80546 0 0 0.00% 0.00%
C 102369 80548 0 0 0.00% 0.00%
D 102369 80521 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 14 188 4792 12.12 1200 1120 303.0
A 0 29 4526 11.24 1200 1120 303.0
A 14 204 4063 9.71 1200 1120 303.0
B 2 9 3758 11.03 1175 1115 239.6
B 12 226 3124 8.38 1175 1115 239.6
B 3 17 3017 7.94 1175 1115 239.6
C 1 80 3452 7.34 1202 1114 318.6
C 1 81 3450 7.33 1202 1114 318.6
C 12 241 3173 6.46 1202 1114 318.6
D 7 5 2848 6.11 1115 1010 300.9
D 3 14 2841 6.09 1115 1010 300.9
D 11 82 2824 6.03 1115 1010 300.9

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