ASTROSAT CZTI

Data Quality Report

Orbit 20161124_C02_018T01_9000000822_level2

Creation date: 2021-08-25T18:42:34.283367
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/AS1C02_018T01_9000000822cztM0_level2_bc.evt modeM0/AS1C02_018T01_9000000822cztM0_level2_quad_clean.evt
Size (bytes)2,054,393,280578,761,920
Size1.9 GB 552.0 MB
Events in quadrant A12,589,9423,618,648
Events in quadrant B13,396,2553,628,334
Events in quadrant C9,086,8523,710,870
Events in quadrant D23,966,5803,369,104

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09560
B09560
C09560
D09560

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01065430
B01118500
C0959830
D01517580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0800
B0800
C0800
D0800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A466466941.487802%
B4664613742.945590%
C466462720.583115%
D4664636897.908502%

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 53720 46642 2 2 0.00% 0.00%
B 53720 46642 107 107 0.20% 0.23%
C 53720 46645 2 2 0.00% 0.00%
D 53720 46641 289 289 0.54% 0.62%

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 8 15 2583646 5055.58 2314 2263 510.6
A 15 236 573880 1119.5 2314 2263 510.6
A 3 80 220956 428.3 2314 2263 510.6
B 3 64 1379827 3094.09 2318 2245 445.2
B 0 219 680765 1523.98 2318 2245 445.2
B 5 172 671263 1502.63 2318 2245 445.2
C 9 54 59525 113.56 2288 2252 504.3
C 8 128 21024 37.22 2288 2252 504.3
C 8 222 20931 37.04 2288 2252 504.3
D 12 220 10741544 19990.37 2227 2129 537.2
D 2 63 1038716 1929.5 2227 2129 537.2
D 12 221 822007 1526.12 2227 2129 537.2

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