ASTROSAT CZTI

Data Quality Report

Orbit 35854

Creation date: 2024-06-27T21:19:05.125882
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/AS1A11_080T01_9000005146_35854cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35854cztM0_level2_quad_clean.evt
Size (bytes)1,076,892,480166,795,200
Size1.0 GB 159.1 MB
Events in quadrant A8,043,0941,054,947
Events in quadrant B7,718,0811,056,164
Events in quadrant C7,359,9631,023,943
Events in quadrant D8,579,618982,123

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02760
B02760
C02760
D02760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0323404
B0312163
C0295723
D0340883

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13529260.192180%
B135291350.997856%
C135291501.108729%
D135292491.840491%

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 19028 13532 6 6 0.03% 0.04%
B 19028 13532 80 80 0.42% 0.59%
C 19028 13532 137 137 0.72% 1.01%
D 19028 13532 208 208 1.09% 1.54%

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 15 169 1078890 3182.32 1700 1674 338.5
A 10 83 323638 951.15 1700 1674 338.5
A 13 6 35273 99.26 1700 1674 338.5
B 5 172 591647 1893.17 1663 1627 311.7
B 0 213 366569 1170.97 1663 1627 311.7
B 5 255 53011 164.87 1663 1627 311.7
C 15 214 559791 1505.34 1614 1631 370.8
C 0 10 381855 1025.45 1614 1631 370.8
C 9 69 83053 219.59 1614 1631 370.8
D 13 200 506633 1275.76 1631 1591 395.9
D 7 223 477643 1202.53 1631 1591 395.9
D 8 195 338417 850.84 1631 1591 395.9

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