ASTROSAT CZTI

Data Quality Report

Orbit 52157

Creation date: 2025-05-20T14:40:59.151744
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/AS1C09_011T08_9000006472_52157cztM0_level2.fits modeM0/AS1C09_011T08_9000006472_52157cztM0_level2_quad_clean.evt
Size (bytes)1,498,239,360129,288,960
Size1.4 GB 123.3 MB
Events in quadrant A9,772,9461,067,385
Events in quadrant B8,210,6991,134,162
Events in quadrant C13,594,595868,296
Events in quadrant D22,947,31410,227

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0377132
B0328422
C0488882
D0765185

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02460
B02460
C02460
D02460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A120504323.585062%
B120506705.560166%
C12050262321.767635%
D120491194899.161756%

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 13005 12051 283 283 2.18% 2.35%
B 13005 12051 404 404 3.11% 3.35%
C 13005 12052 2176 2176 16.73% 18.06%
D 13003 12048 6597 6597 50.73% 54.76%

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 4 3 2432995 7837.12 1246 1216 310.3
A 3 231 338961 1088.48 1246 1216 310.3
A 11 3 309853 994.67 1246 1216 310.3
B 5 172 1243185 4814.11 1224 1183 258.0
B 10 254 305493 1179.53 1224 1183 258.0
B 5 185 261617 1009.47 1224 1183 258.0
C 15 224 6298802 20166.07 1122 1114 312.3
C 10 22 634842 2029.28 1122 1114 312.3
C 15 252 331345 1057.44 1122 1114 312.3
D 12 1 12542204 243385.7 158 149 51.5
D 6 42 8192741 158981.9 158 149 51.5
D 12 17 843994 16375.29 158 149 51.5

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