ASTROSAT CZTI

Data Quality Report

Orbit 20151124_P01_165T02_9000000120_level2

Creation date: 2025-10-23T18:04:29.828201
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/AS1P01_165T02_9000000120cztM0_level2.fits modeM0/AS1P01_165T02_9000000120cztM0_level2_quad_clean.evt
Size (bytes)336,055,680368,233,920
Size320.5 MB 351.2 MB
Events in quadrant A1,958,3602,215,835
Events in quadrant B1,941,6602,203,856
Events in quadrant C1,944,9562,112,772
Events in quadrant D1,682,4021,969,506

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07840
B07840
C07840
D07840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01649120
B01756400
C01618020
D01564690

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0490
B0490
C0490
D0490

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A38585980.253985%
B385853340.865621%
C385851200.311002%
D385853680.953738%

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 43580 38583 0 0 0.00% 0.00%
B 43579 38567 0 0 0.00% 0.00%
C 43579 38583 0 0 0.00% 0.00%
D 43580 38577 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 7 110 1788 10.86 507 472 121.2
A 0 29 1770 10.71 507 472 121.2
A 14 188 1527 8.7 507 472 121.2
B 2 9 1524 10.78 513 486 96.3
B 14 254 1265 8.09 513 486 96.3
B 10 225 1261 8.05 513 486 96.3
C 9 242 1334 6.69 514 474 128.5
C 12 241 1301 6.44 514 474 128.5
C 3 235 1244 5.99 514 474 128.5
D 1 19 1275 7.13 480 439 117.2
D 6 44 1235 6.79 480 439 117.2
D 6 231 1214 6.61 480 439 117.2

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