ASTROSAT CZTI

Data Quality Report

Orbit 20151111_P01_124T01_9000000094_level2

Creation date: 2025-10-23T10:18:04.764465
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_124T01_9000000094cztM0_level2.fits modeM0/AS1P01_124T01_9000000094cztM0_level2_quad_clean.evt
Size (bytes)332,064,000369,982,080
Size316.7 MB 352.8 MB
Events in quadrant A1,872,0442,178,717
Events in quadrant B1,878,6022,206,563
Events in quadrant C1,858,7802,081,124
Events in quadrant D1,535,6441,827,783

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02160
B02160
C02160
D02160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01775190
B01784040
C01653420
D01898040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08680
B08680
C08680
D08680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A423901650.389243%
B423902230.526067%
C423903300.778485%
D4239017654.163718%

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 63951 42388 0 0 0.00% 0.00%
B 63951 42389 0 0 0.00% 0.00%
C 63951 42362 0 0 0.00% 0.00%
D 63951 42360 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 1821 11.79 487 455 115.8
A 0 29 1717 10.89 487 455 115.8
A 0 30 1338 7.62 487 455 115.8
B 2 9 1536 12.11 495 471 87.9
B 14 254 1274 9.13 495 471 87.9
B 2 8 1214 8.45 495 471 87.9
C 2 191 1305 6.99 491 455 121.6
C 12 241 1303 6.97 491 455 121.6
C 3 235 1270 6.7 491 455 121.6
D 6 231 1166 7.1 439 404 107.3
D 6 44 1140 6.86 439 404 107.3
D 11 82 1103 6.51 439 404 107.3

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