ASTROSAT CZTI

Data Quality Report

Orbit 20171005_G08_068T01_9000001580_level2

Creation date: 2025-11-17T12:38:26.537022
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_068T01_9000001580cztM0_level2.fits modeM0/AS1G08_068T01_9000001580cztM0_level2_quad_clean.evt
Size (bytes)142,096,320116,055,360
Size135.5 MB 110.7 MB
Events in quadrant A865,942646,280
Events in quadrant B846,428678,236
Events in quadrant C877,304657,725
Events in quadrant D760,552578,698

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0397750
B0355190
C0290070
D0343720

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02800
B02820
C02820
D02820

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0380
B0380
C0380
D0380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1379611298.183531%
B137966644.812989%
C138001320.956522%
D137955203.769482%

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 17608 13775 0 0 0.00% 0.00%
B 17608 13808 0 0 0.00% 0.00%
C 17608 13808 0 0 0.00% 0.00%
D 17608 13707 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 29 844 11.09 226 213 56.9
A 7 110 692 8.42 226 213 56.9
A 0 30 672 8.07 226 213 56.9
B 2 9 686 10.23 224 215 46.0
B 5 128 604 8.45 224 215 46.0
B 12 226 603 8.43 224 215 46.0
C 1 80 666 7.38 231 218 60.7
C 1 81 648 7.08 231 218 60.7
C 2 191 613 6.51 231 218 60.7
D 1 19 564 6.2 217 199 58.8
D 6 83 539 5.78 217 199 58.8
D 6 67 531 5.64 217 199 58.8

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