ASTROSAT CZTI

Data Quality Report

Orbit 35841

Creation date: 2022-06-08T17:00:07.125699
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_080T01_9000005146_35841cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35841cztM0_level2_quad_clean.evt
Size (bytes)507,839,04056,160,000
Size484.3 MB 53.6 MB
Events in quadrant A4,272,563336,686
Events in quadrant B3,219,510352,339
Events in quadrant C3,752,851330,987
Events in quadrant D3,787,037320,087

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240
B0240
C0240
D0250

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160673
B0127372
C0141252
D0143732

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A51324128.028059%
B5132541.052221%
C51323516.839439%
D51322725.300078%

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 7254 5133 401 401 5.53% 7.81%
B 7254 5133 25 25 0.34% 0.49%
C 7254 5133 315 315 4.34% 6.14%
D 7254 5133 277 277 3.82% 5.40%

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 1478564 10881.0 680 670 135.8
A 10 83 153294 1123.69 680 670 135.8
A 13 6 12178 84.72 680 670 135.8
B 0 213 267628 2088.82 682 669 127.8
B 5 172 103995 808.47 682 669 127.8
B 0 214 55863 431.87 682 669 127.8
C 0 10 571568 3919.24 638 646 145.7
C 15 208 474525 3253.06 638 646 145.7
C 15 214 208907 1429.66 638 646 145.7
D 7 223 463322 2889.03 661 646 160.1
D 13 249 229284 1427.66 661 646 160.1
D 2 250 224713 1399.11 661 646 160.1

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