ASTROSAT CZTI

Data Quality Report

Orbit 20170123_A02_175T01_9000000976_level2

Creation date: 2025-11-09T05:47:47.255830
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/AS1A02_175T01_9000000976cztM0_level2.fits modeM0/AS1A02_175T01_9000000976cztM0_level2_quad_clean.evt
Size (bytes)211,697,280139,596,480
Size201.9 MB 133.1 MB
Events in quadrant A1,285,347694,423
Events in quadrant B1,274,361718,536
Events in quadrant C1,268,980679,097
Events in quadrant D1,060,506612,177

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0482300
B0467330
C0502800
D0646230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05240
B05240
C05240
D05240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0720
B0720
C0720
D0720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A218632491.138910%
B218621770.809624%
C218644311.971277%
D2186414236.508416%

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 28003 21805 0 0 0.00% 0.00%
B 28003 21804 0 0 0.00% 0.00%
C 28003 21805 0 0 0.00% 0.00%
D 28003 21793 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 1273 11.33 334 313 84.8
A 7 110 1108 9.38 334 313 84.8
A 0 30 943 7.43 334 313 84.8
B 2 9 1051 10.24 336 320 71.4
B 5 128 904 8.18 336 320 71.4
B 12 226 897 8.08 336 320 71.4
C 1 80 901 6.52 335 313 90.1
C 12 241 893 6.44 335 313 90.1
C 1 81 884 6.34 335 313 90.1
D 4 246 837 6.82 302 275 82.4
D 3 14 798 6.34 302 275 82.4
D 15 47 795 6.31 302 275 82.4

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