ASTROSAT CZTI

Data Quality Report

Orbit 20210721_A10_094T32_9000004570_level2

Creation date: 2021-07-22T13:46:02.780371
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/AS1A10_094T32_9000004570cztM0_level2_bc.evt modeM0/AS1A10_094T32_9000004570cztM0_level2_quad_clean.evt
Size (bytes)238,720,32098,196,480
Size227.7 MB 93.6 MB
Events in quadrant A1,063,487665,906
Events in quadrant B2,799,199653,546
Events in quadrant C1,045,824650,441
Events in quadrant D1,959,918639,976

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0106760
B0166630
C0109490
D0134190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A51851673.220829%
B51852985.747348%
C51853326.403086%
D51853095.959499%

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 5540 5184 0 0 0.00% 0.00%
B 5540 5184 3 3 0.05% 0.06%
C 5540 5184 0 0 0.00% 0.00%
D 5540 5184 47 47 0.85% 0.91%

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 12 16 26126 428.52 267 261 60.4
A 13 254 10518 169.93 267 261 60.4
A 12 194 5738 90.74 267 261 60.4
B 6 159 1367278 25766.46 263 257 53.1
B 12 1 305796 5758.99 263 257 53.1
B 4 80 56623 1062.42 263 257 53.1
C 14 254 28214 435.75 257 256 64.2
C 3 233 14929 228.69 257 256 64.2
C 2 114 9690 147.04 257 256 64.2
D 8 195 468779 7098.13 263 254 66.0
D 13 249 173046 2617.79 263 254 66.0
D 12 218 104577 1580.49 263 254 66.0

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