ASTROSAT CZTI

Data Quality Report

Orbit 20220628_A11_049T05_9000005212_level2

Creation date: 2022-06-30T12:22:33.328926
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/AS1A11_049T05_9000005212cztM0_level2_bc.evt modeM0/AS1A11_049T05_9000005212cztM0_level2_quad_clean.evt
Size (bytes)2,074,875,840570,634,560
Size1.9 GB 544.2 MB
Events in quadrant A11,222,7843,610,481
Events in quadrant B14,246,6473,561,356
Events in quadrant C12,264,6473,509,959
Events in quadrant D21,856,4673,327,794

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09740
B09740
C09740
D09740

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0992890
B01135630
C01013740
D01361060

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01610
B01610
C01610
D01610

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A477011290.270435%
B477019511.993669%
C477014460.934991%
D4770121014.404520%

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 63826 47710 20 20 0.03% 0.04%
B 63826 47700 71 71 0.11% 0.15%
C 63826 47701 33 33 0.05% 0.07%
D 63826 47700 909 909 1.42% 1.91%

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 10 83 1345362 2469.38 2420 2380 543.9
A 7 3 261776 476.96 2420 2380 543.9
A 9 143 82940 148.13 2420 2380 543.9
B 5 172 2287078 4793.6 2391 2334 476.6
B 5 255 899406 1882.14 2391 2334 476.6
B 0 189 763323 1596.62 2391 2334 476.6
C 15 214 1917915 3640.86 2311 2293 526.1
C 0 10 1148389 2178.29 2311 2293 526.1
C 0 207 62265 113.98 2311 2293 526.1
D 12 227 7228246 13101.22 2327 2258 551.6
D 12 235 1282496 2321.16 2327 2258 551.6
D 13 249 880155 1591.69 2327 2258 551.6

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