ASTROSAT CZTI

Data Quality Report

Orbit 17987

Creation date: 2024-06-27T17:43:29.188086
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_108T02_9000002676_17987cztM0_level2.evt modeM0/AS1A05_108T02_9000002676_17987cztM0_level2_quad_clean.evt
Size (bytes)1,566,930,240264,856,320
Size1.5 GB 252.6 MB
Events in quadrant A12,137,0021,631,812
Events in quadrant B10,449,5971,673,674
Events in quadrant C10,779,9481,609,302
Events in quadrant D12,590,7861,581,229

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04540
B04540
C04540
D04540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0505544
B0452564
C0459324
D0521474

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A221524582.067533%
B221531960.884756%
C221533281.480612%
D221534762.148693%

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 25307 22155 213 213 0.84% 0.96%
B 25308 22156 3 3 0.01% 0.01%
C 25308 22156 24 24 0.09% 0.11%
D 25308 22156 272 272 1.07% 1.23%

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 14 237 1934480 3632.24 2645 2584 531.9
A 4 2 35024 60.99 2645 2584 531.9
A 0 226 23042 38.46 2645 2584 531.9
B 12 111 61999 117.56 2651 2584 505.4
B 11 111 53859 101.45 2651 2584 505.4
B 14 111 45568 85.05 2651 2584 505.4
C 14 238 396660 654.02 2572 2586 602.5
C 0 207 196874 322.45 2572 2586 602.5
C 3 233 146159 238.28 2572 2586 602.5
D 5 222 957279 1397.97 2577 2528 683.0
D 7 238 801519 1169.9 2577 2528 683.0
D 11 176 719517 1049.84 2577 2528 683.0

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