ASTROSAT CZTI

Data Quality Report

Orbit 12995

Creation date: 2024-06-27T16:34:51.925441
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/AS1G08_055T01_9000001912_12995cztM0_level2.evt modeM0/AS1G08_055T01_9000001912_12995cztM0_level2_quad_clean.evt
Size (bytes)2,512,658,880470,655,360
Size2.3 GB 448.9 MB
Events in quadrant A17,026,6613,060,425
Events in quadrant B24,190,5312,897,082
Events in quadrant C15,357,7973,053,087
Events in quadrant D17,224,0082,907,077

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0450
B0450
C0450
D0450

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06940
B06940
C06940
D06940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0725896
B0942515
C0692625
D0754565

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A340081780.523406%
B34008352610.368149%
C34008950.279346%
D340085441.599624%

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 38751 34016 13 13 0.03% 0.04%
B 38751 34015 1711 1711 4.42% 5.03%
C 38751 34016 21 21 0.05% 0.06%
D 38751 34016 344 344 0.89% 1.01%

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 12 189 935696 1175.18 3967 3883 792.9
A 1 162 210271 260.29 3967 3883 792.9
A 15 222 203938 252.3 3967 3883 792.9
B 4 239 5223554 7533.2 3723 3626 692.9
B 3 64 1714637 2469.26 3723 3626 692.9
B 0 85 1177263 1693.75 3723 3626 692.9
C 0 207 98288 105.55 3892 3910 894.2
C 14 234 59730 62.43 3892 3910 894.2
C 13 61 28247 27.22 3892 3910 894.2
D 1 52 1632385 1798.45 3827 3723 905.6
D 10 157 799379 878.6 3827 3723 905.6
D 8 195 154600 166.6 3827 3723 905.6

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