ASTROSAT CZTI

Data Quality Report

Orbit 36801

Creation date: 2024-06-27T21:31:51.866053
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_075T01_9000005244_36801cztM0_level2.evt modeM0/AS1A11_075T01_9000005244_36801cztM0_level2_quad_clean.evt
Size (bytes)1,949,584,320158,261,760
Size1.8 GB 150.9 MB
Events in quadrant A6,917,0971,048,855
Events in quadrant B32,812,450682,985
Events in quadrant C9,285,2001,059,195
Events in quadrant D9,048,834993,005

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02980
B02980
C02980
D02980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0297674
B01074403
C0368723
D03751011

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0510
B0510
C0510
D0510

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14570170.116678%
B145701137278.050789%
C145705473.754290%
D145695323.651589%

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 19678 14573 3 3 0.02% 0.02%
B 19677 14569 11053 11053 56.17% 75.87%
C 19678 14573 484 484 2.46% 3.32%
D 19677 14571 464 464 2.36% 3.18%

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 10 83 508488 1551.21 1636 1603 326.8
A 10 255 28974 83.76 1636 1603 326.8
A 13 6 27915 80.52 1636 1603 326.8
B 12 1 27764300 150530.35 992 969 184.4
B 4 171 208208 1123.63 992 969 184.4
B 0 190 189111 1020.09 992 969 184.4
C 0 207 1510301 4243.91 1557 1568 355.5
C 1 23 935648 2627.47 1557 1568 355.5
C 15 214 616257 1729.05 1557 1568 355.5
D 13 249 1308476 3437.25 1569 1526 380.2
D 1 20 442549 1159.88 1569 1526 380.2
D 10 203 370107 969.36 1569 1526 380.2

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