ASTROSAT CZTI

Data Quality Report

Orbit 18796

Creation date: 2024-06-27T17:54:47.324571
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/AS1A05_024T01_9000002810_18796cztM0_level2.evt modeM0/AS1A05_024T01_9000002810_18796cztM0_level2_quad_clean.evt
Size (bytes)1,706,595,840313,280,640
Size1.6 GB 298.8 MB
Events in quadrant A11,615,3061,975,114
Events in quadrant B11,996,9572,017,118
Events in quadrant C11,813,6491,927,738
Events in quadrant D14,581,9951,862,031

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05060
B05060
C05060
D05060

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0511065
B0518555
C0510375
D0605815

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A248031580.637020%
B248042801.128850%
C248043011.213514%
D248046072.447186%

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 27433 24809 2 2 0.01% 0.01%
B 27434 24810 25 25 0.09% 0.10%
C 27434 24810 2 2 0.01% 0.01%
D 27434 24810 385 385 1.40% 1.55%

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 6 16 61349 97.68 2967 2902 598.3
A 12 96 46333 72.58 2967 2902 598.3
A 13 254 39485 61.14 2967 2902 598.3
B 7 220 124027 214.75 2967 2888 564.1
B 12 111 69129 117.43 2967 2888 564.1
B 11 111 60018 101.28 2967 2888 564.1
C 14 238 444258 658.38 2865 2876 670.4
C 3 233 151606 221.85 2865 2876 670.4
C 0 207 26008 34.5 2865 2876 670.4
D 1 52 2564539 3682.16 2873 2788 695.7
D 5 222 1026897 1472.02 2873 2788 695.7
D 2 234 107972 151.19 2873 2788 695.7

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