ASTROSAT CZTI

Data Quality Report

Orbit 34257

Creation date: 2022-07-18T15:14:03.724929
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_059T09_9000004888_34257cztM0_level2.evt modeM0/AS1A11_059T09_9000004888_34257cztM0_level2_quad_clean.evt
Size (bytes)1,327,003,200178,790,400
Size1.2 GB 170.5 MB
Events in quadrant A7,170,5031,112,683
Events in quadrant B9,075,1041,117,037
Events in quadrant C9,272,3781,091,284
Events in quadrant D13,627,9971,026,412

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0314860
B0366710
C0366980
D0508790

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03140
B03140
C03140
D03140

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0480
B0480
C0480
D0490

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15469210.135755%
B154694642.999547%
C154693172.049260%
D154699025.831017%

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 19768 15472 2 2 0.01% 0.01%
B 19768 15472 274 274 1.39% 1.77%
C 19768 15472 271 271 1.37% 1.75%
D 19768 15472 984 984 4.98% 6.36%

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 15 169 69926 190.69 1798 1762 357.5
A 10 83 52829 142.86 1798 1762 357.5
A 9 143 39165 104.63 1798 1762 357.5
B 5 172 1501189 4446.18 1774 1730 337.2
B 0 189 236706 696.75 1774 1730 337.2
B 0 229 77164 223.68 1774 1730 337.2
C 0 207 716809 1787.13 1732 1742 400.1
C 15 214 664821 1657.2 1732 1742 400.1
C 0 10 535546 1334.11 1732 1742 400.1
D 8 195 3604405 8396.94 1728 1678 429.1
D 7 223 2179175 5075.13 1728 1678 429.1
D 2 249 358493 831.63 1728 1678 429.1

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