ASTROSAT CZTI

Data Quality Report

Orbit 20200121_A07_135T02_9000003450_level2

Creation date: 2020-01-23T16:57:26.229736
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A07_135T02_9000003450cztM0_level2_bc.evt modeM0/AS1A07_135T02_9000003450cztM0_level2_quad_clean.evt
Size (bytes)4,152,182,4001,162,088,640
Size3.9 GB 1.1 GB
Events in quadrant A19,693,5717,348,787
Events in quadrant B20,484,5587,463,124
Events in quadrant C25,033,3447,298,646
Events in quadrant D54,315,5346,821,389

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01310
B01310
C01310
D01310

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01912770
B01935020
C02096130
D03116100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018640
B018660
C018640
D018680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9136310971.200705%
B9132414311.566948%
C9137333583.675046%
D912811467216.073444%

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 111780 91778 29 29 0.03% 0.03%
B 111780 91722 159 159 0.14% 0.17%
C 111780 91780 507 507 0.45% 0.55%
D 111780 91671 2877 2877 2.57% 3.14%

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 15 174 391462 361.72 4968 4873 1068.7
A 13 254 130537 117.58 4968 4873 1068.7
A 6 16 73865 64.55 4968 4873 1068.7
B 0 245 536723 570.74 4996 4878 931.9
B 0 190 202285 211.84 4996 4878 931.9
B 5 172 171977 179.32 4996 4878 931.9
C 0 239 5232393 4639.1 4825 4809 1126.9
C 10 9 523332 460.15 4825 4809 1126.9
C 7 247 366045 320.57 4825 4809 1126.9
D 7 223 21450011 19567.14 4704 4538 1096.0
D 1 52 10700475 9759.12 4704 4538 1096.0
D 12 227 815483 739.92 4704 4538 1096.0

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