ASTROSAT CZTI

Data Quality Report

Orbit 01251

Creation date: 2024-06-27T14:09:51.654760
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/AS1G04_011T02_9000000226_01251cztM0_level2.evt modeM0/AS1G04_011T02_9000000226_01251cztM0_level2_quad_clean.evt
Size (bytes)1,311,321,60092,718,720
Size1.2 GB 88.4 MB
Events in quadrant A8,195,826635,480
Events in quadrant B14,013,515503,170
Events in quadrant C7,777,361620,129
Events in quadrant D9,293,139589,454

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290112
B0466681
C0277991
D0323691

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6570370.563166%
B6570228734.809741%
C6570180.273973%
D65704887.427702%

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 6924 6569 365 365 5.27% 5.56%
B 6925 6570 3324 3324 48.00% 50.59%
C 6925 6570 178 178 2.57% 2.71%
D 6924 6569 945 945 13.65% 14.39%

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 8 14 349053 712.08 2023 2039 487.3
A 12 243 33303 64.15 2023 2039 487.3
A 4 32 15282 27.17 2023 2039 487.3
B 2 32 6744072 16078.68 1765 1775 419.3
B 5 191 197573 466.93 1765 1775 419.3
B 12 52 114186 268.07 1765 1775 419.3
C 15 241 301413 573.44 1875 1939 522.2
C 3 79 50518 93.02 1875 1939 522.2
C 3 111 32493 58.51 1875 1939 522.2
D 10 84 1829263 3293.85 1783 1853 554.8
D 12 22 761290 1368.86 1783 1853 554.8
D 10 85 18763 30.48 1783 1853 554.8

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