ASTROSAT CZTI

Data Quality Report

Orbit 18680

Creation date: 2024-06-27T17:53:21.707100
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/AS1T03_091T01_9000002790_18680cztM0_level2.evt modeM0/AS1T03_091T01_9000002790_18680cztM0_level2_quad_clean.evt
Size (bytes)1,322,841,600247,559,040
Size1.2 GB 236.1 MB
Events in quadrant A8,841,1851,573,413
Events in quadrant B9,260,1301,606,943
Events in quadrant C9,263,8941,524,609
Events in quadrant D11,401,7311,473,029

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03900
B03900
C03900
D03900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390144
B0398324
C0398314
D0470834

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A191641130.589647%
B191641870.975788%
C191642501.304529%
D191655662.953300%

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 21264 19167 1 1 0.00% 0.01%
B 21264 19168 12 12 0.06% 0.06%
C 21264 19165 15 15 0.07% 0.08%
D 21265 19168 386 386 1.82% 2.01%

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 13 254 31441 63.4 2286 2233 460.7
A 0 226 19748 38.02 2286 2233 460.7
A 3 137 18109 34.46 2286 2233 460.7
B 0 197 66083 146.04 2292 2235 437.2
B 0 189 56154 123.33 2292 2235 437.2
B 12 111 53703 117.72 2292 2235 437.2
C 14 238 341892 662.57 2192 2205 512.7
C 3 233 331854 642.99 2192 2205 512.7
C 9 54 37844 69.52 2192 2205 512.7
D 1 52 1858404 3510.45 2182 2114 528.8
D 7 238 1213356 2290.59 2182 2114 528.8
D 2 234 79804 146.92 2182 2114 528.8

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