ASTROSAT CZTI

Data Quality Report

Orbit 20181115_A05_206T01_9000002518_level2

Creation date: 2025-11-25T21:55:33.063104
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/AS1A05_206T01_9000002518cztM0_level2.fits modeM0/AS1A05_206T01_9000002518cztM0_level2_quad_clean.evt
Size (bytes)769,893,120743,037,120
Size734.2 MB 708.6 MB
Events in quadrant A4,577,2724,286,305
Events in quadrant B4,483,2584,436,621
Events in quadrant C4,631,9604,255,120
Events in quadrant D4,025,7003,929,348

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016680
B016680
C016680
D016680

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02062490
B01839990
C01759600
D01832420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01130
B01130
C01130
D01130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8160251206.274356%
B8160317342.124922%
C8160313551.660478%
D8160314941.830815%

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 98452 81547 0 0 0.00% 0.00%
B 98452 81596 0 0 0.00% 0.00%
C 98452 81604 0 0 0.00% 0.00%
D 98452 81589 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 4407 10.98 1191 1116 299.6
A 7 110 3788 8.92 1191 1116 299.6
A 0 30 3509 7.99 1191 1116 299.6
B 2 9 3687 11.12 1186 1134 229.5
B 3 17 3086 8.5 1186 1134 229.5
B 2 8 3069 8.43 1186 1134 229.5
C 1 80 3567 7.73 1223 1144 313.3
C 1 81 3553 7.69 1223 1144 313.3
C 12 241 3251 6.73 1223 1144 313.3
D 6 231 2930 6.19 1151 1050 303.8
D 3 14 2886 6.04 1151 1050 303.8
D 7 3 2865 5.97 1151 1050 303.8

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