ASTROSAT CZTI

Data Quality Report

Orbit 20180618_A04_048T01_9000002176_level2

Creation date: 2025-11-23T01:03:23.575422
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_048T01_9000002176cztM0_level2.fits modeM0/AS1A04_048T01_9000002176cztM0_level2_quad_clean.evt
Size (bytes)723,720,960740,315,520
Size690.2 MB 706.0 MB
Events in quadrant A4,448,4324,591,653
Events in quadrant B4,255,3564,446,025
Events in quadrant C4,278,2604,234,466
Events in quadrant D3,785,7143,998,882

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01170
B01170
C01170
D01170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01613900
B01608080
C01756120
D01667150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015260
B015260
C015260
D015260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A751247811.039615%
B751248671.154092%
C751247901.051595%
D7512413091.742452%

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 86663 75112 0 0 0.00% 0.00%
B 86663 75115 0 0 0.00% 0.00%
C 86663 75107 0 0 0.00% 0.00%
D 86663 75038 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 4345 11.28 1158 1083 289.1
A 7 110 3665 8.93 1158 1083 289.1
A 9 19 3369 7.9 1158 1083 289.1
B 2 9 3679 11.9 1124 1076 218.8
B 14 254 2925 8.45 1124 1076 218.8
B 5 128 2869 8.2 1124 1076 218.8
C 1 80 3284 7.66 1130 1054 291.0
C 1 81 3192 7.35 1130 1054 291.0
C 12 241 2985 6.63 1130 1054 291.0
D 3 14 2814 6.27 1080 981 292.3
D 6 231 2802 6.23 1080 981 292.3
D 10 189 2720 5.95 1080 981 292.3

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