ASTROSAT CZTI

Data Quality Report

Orbit 20180713_G08_028T01_9000002220_level2

Creation date: 2025-11-23T11:09:37.471593
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/AS1G08_028T01_9000002220cztM0_level2.fits modeM0/AS1G08_028T01_9000002220cztM0_level2_quad_clean.evt
Size (bytes)856,077,120731,373,120
Size816.4 MB 697.5 MB
Events in quadrant A5,237,2264,230,381
Events in quadrant B5,028,3204,247,596
Events in quadrant C5,095,9843,933,140
Events in quadrant D4,471,0663,644,649

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01837440
B02079430
C01967080
D01909330

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018020
B018020
C018020
D018020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8888712631.420905%
B8888729123.276070%
C8888714351.614409%
D8888717231.938416%

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 102442 88877 0 0 0.00% 0.00%
B 102442 88871 0 0 0.00% 0.00%
C 102442 88875 0 0 0.00% 0.00%
D 102442 88809 0 0 0.00% 0.00%

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 0 29 4831 10.52 1361 1272 338.5
A 7 110 4183 8.6 1361 1272 338.5
A 15 236 3908 7.79 1361 1272 338.5
B 2 9 4353 11.61 1322 1255 266.8
B 3 17 3383 7.98 1322 1255 266.8
B 5 232 3353 7.86 1322 1255 266.8
C 1 81 3840 7.37 1346 1249 351.5
C 1 80 3808 7.28 1346 1249 351.5
C 12 241 3699 6.97 1346 1249 351.5
D 6 231 3149 5.83 1272 1151 342.4
D 7 3 3074 5.61 1272 1151 342.4
D 10 189 3047 5.54 1272 1151 342.4

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