ASTROSAT CZTI

Data Quality Report

Orbit 18651

Creation date: 2024-06-27T17:52:57.829274
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/AS1A06_003T01_9000002786_18651cztM0_level2.evt modeM0/AS1A06_003T01_9000002786_18651cztM0_level2_quad_clean.evt
Size (bytes)1,602,440,640255,533,760
Size1.5 GB 243.7 MB
Events in quadrant A9,434,8911,635,037
Events in quadrant B9,564,6071,665,946
Events in quadrant C9,920,3341,616,144
Events in quadrant D18,265,8801,450,268

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04060
B04060
C04060
D04060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0409694
B0413664
C0422254
D0679284

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A199152181.094652%
B199163211.611769%
C199164062.038562%
D19916302815.203856%

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 21705 19919 0 0 0.00% 0.00%
B 21706 19919 22 22 0.10% 0.11%
C 21706 19921 65 65 0.30% 0.33%
D 21706 19920 2652 2652 12.22% 13.31%

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 0 13 188955 387.09 2386 2331 482.1
A 6 16 39227 76.53 2386 2331 482.1
A 13 254 25777 48.63 2386 2331 482.1
B 0 244 69943 148.8 2380 2313 454.5
B 0 230 59843 126.58 2380 2313 454.5
B 12 111 57549 121.53 2380 2313 454.5
C 9 221 422143 776.31 2303 2311 540.8
C 14 238 356989 655.83 2303 2311 540.8
C 3 233 126433 229.51 2303 2311 540.8
D 1 52 8737076 16788.97 2156 2095 520.3
D 7 238 1090566 2092.08 2156 2095 520.3
D 1 20 112940 213.05 2156 2095 520.3

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