ASTROSAT CZTI

Data Quality Report

Orbit 20211220_T04_090T01_9000004812_level2

Creation date: 2021-12-24T17:32:21.564662
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/AS1T04_090T01_9000004812cztM0_level2_bc.evt modeM0/AS1T04_090T01_9000004812cztM0_level2_quad_clean.evt
Size (bytes)7,728,972,4801,370,908,800
Size7.2 GB 1.3 GB
Events in quadrant A95,726,2807,192,097
Events in quadrant B40,685,6709,003,440
Events in quadrant C33,031,2159,344,543
Events in quadrant D57,394,4928,663,952

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03920
B03940
C03930
D03930

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05452540
B02935710
C02455050
D03356610

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A022020
B021880
C021880
D021860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1065524278440.153165%
B10648573726.923041%
C10667611611.088342%
D10644451874.872985%

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 148774 106822 4273 4273 2.87% 4.00%
B 148774 106720 264 264 0.18% 0.25%
C 148774 107018 35 35 0.02% 0.03%
D 148774 106822 1351 1351 0.91% 1.26%

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 15 169 70710292 73472.08 4404 4357 962.4
A 15 237 7083845 7356.45 4404 4357 962.4
A 14 4 662521 683.91 4404 4357 962.4
B 5 172 13926373 12669.65 5639 5529 1098.8
B 5 255 1541618 1398.03 5639 5529 1098.8
B 15 85 651703 588.1 5639 5529 1098.8
C 15 214 4437310 3475.46 5666 5644 1275.1
C 3 233 3281528 2569.05 5666 5644 1275.1
C 0 10 1985071 1552.33 5666 5644 1275.1
D 8 195 16150210 11400.09 5545 5418 1416.2
D 7 80 3220002 2269.87 5545 5418 1416.2
D 8 230 2966840 2091.11 5545 5418 1416.2

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