ASTROSAT CZTI

Data Quality Report

Orbit 20161102_G06_157T01_9000000772_level2

Creation date: 2025-11-07T14:10:03.328009
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/AS1G06_157T01_9000000772cztM0_level2.fits modeM0/AS1G06_157T01_9000000772cztM0_level2_quad_clean.evt
Size (bytes)674,254,080710,709,120
Size643.0 MB 677.8 MB
Events in quadrant A4,305,9954,546,161
Events in quadrant B3,708,4034,040,125
Events in quadrant C4,098,5164,053,286
Events in quadrant D2,668,5563,257,483

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01370
B01340
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01875860
B01705840
C02372030
D02175310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017000
B017000
C017020
D017080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8189418532.262681%
B823889801.189494%
C82453955011.582356%
D8089449576.127772%

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 105624 85442 0 0 0.00% 0.00%
B 105624 85870 0 0 0.00% 0.00%
C 105625 85728 0 0 0.00% 0.00%
D 105625 83963 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 14 188 4318 11.45 1117 1041 286.2
A 0 29 4212 11.08 1117 1041 286.2
A 7 110 3718 9.35 1117 1041 286.2
B 2 9 3070 11.1 978 932 192.7
B 14 254 2620 8.76 978 932 192.7
B 12 226 2583 8.57 978 932 192.7
C 1 81 2969 6.8 1083 1002 289.1
C 12 241 2954 6.75 1083 1002 289.1
C 1 80 2930 6.67 1083 1002 289.1
D 6 231 2003 7.13 761 703 182.2
D 11 82 1908 6.61 761 703 182.2
D 6 83 1906 6.6 761 703 182.2

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