ASTROSAT CZTI

Data Quality Report

Orbit 20170901_G07_068T02_9000001508_level2

Creation date: 2021-08-27T19:14:57.571277
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/AS1G07_068T02_9000001508cztM0_level2_bc.evt modeM0/AS1G07_068T02_9000001508cztM0_level2_quad_clean.evt
Size (bytes)1,189,347,840308,571,840
Size1.1 GB 294.3 MB
Events in quadrant A10,210,5741,836,058
Events in quadrant B7,998,2711,919,212
Events in quadrant C5,388,4161,967,139
Events in quadrant D10,678,0251,864,986

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05320
B05300
C05310
D05270

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0610
B0610
C0610
D0610

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0684930
B0633760
C0533140
D0713520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A250725722.281429%
B252559163.627005%
C257961990.771437%
D2608710664.086327%

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 32526 25863 22 22 0.07% 0.09%
B 32526 25950 29 29 0.09% 0.11%
C 32526 26391 2 2 0.01% 0.01%
D 32526 26356 94 94 0.29% 0.36%

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 13 251 5140416 18479.01 1291 1265 278.1
A 4 2 38940 135.47 1291 1265 278.1
A 14 254 22552 76.54 1291 1265 278.1
B 4 239 2025058 8248.79 1317 1285 245.3
B 10 245 309832 1257.62 1317 1285 245.3
B 4 81 268958 1091.02 1317 1285 245.3
C 14 234 87772 291.2 1351 1332 296.8
C 14 67 11158 33.1 1351 1332 296.8
C 13 61 8036 22.58 1351 1332 296.8
D 2 33 1877552 6152.42 1340 1293 305.0
D 8 195 1755835 5753.3 1340 1293 305.0
D 1 52 707768 2316.6 1340 1293 305.0

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