ASTROSAT CZTI

Data Quality Report

Orbit 20171021_A04_049T01_9000001632_level2

Creation date: 2025-11-17T22:15:21.212064
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/AS1A04_049T01_9000001632cztM0_level2.fits modeM0/AS1A04_049T01_9000001632cztM0_level2_quad_clean.evt
Size (bytes)259,467,840220,795,200
Size247.4 MB 210.6 MB
Events in quadrant A1,537,4881,198,042
Events in quadrant B1,490,6081,195,008
Events in quadrant C1,587,0781,262,307
Events in quadrant D1,312,6881,102,317

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0600
B0600
C0610
D0600

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05720
B05760
C05720
D05700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0808020
B0841310
C0574170
D0786410

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2799918216.503804%
B2799725319.040254%
C280881360.484193%
D2804113034.646767%

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 35359 28086 0 0 0.00% 0.00%
B 35359 28124 0 0 0.00% 0.00%
C 35359 28221 0 0 0.00% 0.00%
D 35359 28121 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 1506 11.04 400 377 102.3
A 7 110 1245 8.49 400 377 102.3
A 0 30 1160 7.66 400 377 102.3
B 2 9 1291 11.62 394 376 78.8
B 5 128 1006 8.0 394 376 78.8
B 2 8 1004 7.97 394 376 78.8
C 1 80 1208 7.44 418 390 109.8
C 1 81 1139 6.82 418 390 109.8
C 2 191 1070 6.19 418 390 109.8
D 6 231 991 6.37 375 341 102.0
D 3 14 988 6.34 375 341 102.0
D 3 31 949 5.96 375 341 102.0

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