ASTROSAT CZTI

Data Quality Report

Orbit 20171207_G08_048T01_9000001752_level2

Creation date: 2025-11-18T23:14:44.536749
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_048T01_9000001752cztM0_level2.fits modeM0/AS1G08_048T01_9000001752cztM0_level2_quad_clean.evt
Size (bytes)226,195,200182,289,600
Size215.7 MB 173.8 MB
Events in quadrant A1,362,4781,027,241
Events in quadrant B1,300,664988,347
Events in quadrant C1,359,680957,945
Events in quadrant D1,160,968879,453

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0519850
B0612390
C0492680
D0568330

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04940
B04940
C04940
D04940

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0500
B0500
C0500
D0500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A242212350.970232%
B2422112815.288799%
C24221840.346806%
D242214031.663845%

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 29261 24220 0 0 0.00% 0.00%
B 29261 24188 0 0 0.00% 0.00%
C 29261 24221 0 0 0.00% 0.00%
D 29261 24220 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 10.28 354 331 91.6
A 7 110 1191 9.39 354 331 91.6
A 9 19 1013 7.45 354 331 91.6
B 2 9 1134 11.35 342 325 71.3
B 12 226 875 7.71 342 325 71.3
B 5 232 851 7.38 342 325 71.3
C 1 80 1014 7.11 359 333 95.8
C 1 81 972 6.67 359 333 95.8
C 12 241 917 6.1 359 333 95.8
D 6 231 877 6.26 330 298 92.5
D 3 14 846 5.92 330 298 92.5
D 3 31 837 5.83 330 298 92.5

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