ASTROSAT CZTI

Data Quality Report

Orbit 20180908_G08_066T02_9000002346_level2

Creation date: 2025-11-24T13:36:38.698696
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_066T02_9000002346cztM0_level2.fits modeM0/AS1G08_066T02_9000002346cztM0_level2_quad_clean.evt
Size (bytes)286,401,600259,571,520
Size273.1 MB 247.5 MB
Events in quadrant A1,710,7541,485,123
Events in quadrant B1,664,3241,519,679
Events in quadrant C1,690,8821,421,556
Events in quadrant D1,495,3381,322,109

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06220
B06220
C06220
D06220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0680960
B0645560
C0636310
D0634590

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A307246452.099336%
B307246242.030986%
C307246522.122120%
D307244461.451634%

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 32409 30721 0 0 0.00% 0.00%
B 32409 30723 0 0 0.00% 0.00%
C 32409 30722 0 0 0.00% 0.00%
D 32409 30721 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 1551 9.86 445 414 115.3
A 7 110 1355 8.16 445 414 115.3
A 15 236 1346 8.08 445 414 115.3
B 2 9 1413 11.02 440 418 90.3
B 2 8 1160 8.22 440 418 90.3
B 5 225 1140 8.0 440 418 90.3
C 12 241 1222 7.03 445 413 115.1
C 3 158 1182 6.68 445 413 115.1
C 2 191 1166 6.54 445 413 115.1
D 3 14 1125 6.37 426 385 116.2
D 6 231 1098 6.14 426 385 116.2
D 1 19 1036 5.6 426 385 116.2

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