ASTROSAT CZTI

Data Quality Report

Orbit 20210913_T04_054T01_9000004694_level2

Creation date: 2021-10-20T14:21:21.025913
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_054T01_9000004694cztM0_level2_bc.evt modeM0/AS1T04_054T01_9000004694cztM0_level2_quad_clean.evt
Size (bytes)5,549,774,4001,383,459,840
Size5.2 GB 1.3 GB
Events in quadrant A22,916,6529,109,295
Events in quadrant B58,833,2908,724,661
Events in quadrant C28,684,7448,689,921
Events in quadrant D50,633,8928,303,227

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021000
B021000
C021000
D021000

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02164230
B03507620
C02432470
D03047580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01860
B01860
C01860
D01860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10322613151.273904%
B10322685398.272141%
C10322657465.566427%
D10322635573.445837%

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 125862 103233 6 6 0.00% 0.01%
B 125862 103223 210 210 0.17% 0.20%
C 125862 103213 55 55 0.04% 0.05%
D 125862 103230 326 326 0.26% 0.32%

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 6 212898 167.09 5764 5699 1240.0
A 13 254 192283 150.47 5764 5699 1240.0
A 0 6 164442 128.01 5764 5699 1240.0
B 6 159 26803099 24989.49 5652 5546 1072.4
B 4 80 6459338 6018.35 5652 5546 1072.4
B 0 168 1577324 1465.73 5652 5546 1072.4
C 0 10 3357443 2560.58 5505 5530 1309.0
C 3 233 3052263 2327.45 5505 5530 1309.0
C 14 254 339873 255.41 5505 5530 1309.0
D 8 195 23230812 18093.61 5591 5434 1283.6
D 12 233 3536862 2751.14 5591 5434 1283.6
D 13 249 689394 532.84 5591 5434 1283.6

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